⚡ Sundance® / Jacuzzi® 6600-730 850 / J-300 LCD Series Spa Circuit Board (2-Pump, 2-Speed Pump 1 + 1-Speed Pump 2, with PermaClear® & Circulation Pump)

The current OEM replacement PCB for 1997–2005 Sundance® 850 Series and 2006–2009 Jacuzzi® J-400 / J-300 LCD Series hot tubs with PermaClear® ozone sanitation, a dedicated circulation pump, and a 2-Speed Pump 1 + 1-Speed Pump 2 configuration.

📋 Product Overview

The Sundance® / Jacuzzi® 6600-730 is the current OEM main circuit board for Sundance® 850 Series and Jacuzzi® J-400 / J-300 LCD Series hot tubs configured with one 2-speed jet pump (Pump 1) and one 1-speed jet pump (Pump 2), a dedicated circulation pump, and PermaClear® ozone sanitation. This board is the factory-designated current replacement for the discontinued predecessor chain of 6600-028 (original, EPROM Rev 1.28GX+), 6600-056, 6600-092, and 6600-180 (used to replace any of the above when the spa has one 2-speed jet pump and one 1-speed jet pump). The 6600-730 consolidates coverage for all these legacy variants into a single current OEM part.

Coverage spans 1997–2005 Sundance® 850 Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, Majesta® — EXCEPT Maxxus®) along with the Jacuzzi® J-400 Series (J-460, J-465, J-470, J-480) and J-300 LCD Series spas from 2006–2009 that use a 2-speed Pump 1 configuration. The board features the same comprehensive JP19 and JP9 jumper banks found across the Sundance® LCD platform (shared with the 6600-728 1-speed P1 variant and the 6600-392 3-pump Maxxus®/Aspen® board), providing full regional (°F/°C, 50/60 Hz, LED/incandescent) and system-logic configuration (40 A / 50 A / 60 A heater logic, Pump 2 enable, trouble log, ILOC).

⚠️ This board is for 2-SPEED Pump 1 + 1-SPEED Pump 2 only. If your spa has two 1-speed pumps (both Pump 1 and Pump 2 being single-speed), you need the 6600-728 instead — not this board. ⚠️ This is the 850/880 LCD platform board for 2-speed Pump 1 applications. For 880 NT System spas (2008+ Optima®/Cameo®, 2009+ Majesta®/Altamar®/Marin®/Capri® which transitioned to the 880 NT platform), use the 6600-390 (2-pump) or 6600-392 (3-pump Maxxus®/Aspen®) instead. ⚠️ NOT compatible with Sundance® Maxxus® or Aspen® 3-pump spas. Maxxus® and Aspen® require a different 3-pump board — for 2002–2004 850 NT Maxxus® 3-pump, use the 6600-094; for 2005+ 880 NT Maxxus®/Aspen® 3-pump, use the 6600-392.

✨ Key Features

• ✅ Current OEM Sundance® / Jacuzzi® replacement – factory-new, current production revision
• ✅ Consolidates multiple discontinued predecessor boards (6600-028, 6600-056, 6600-092, 6600-180 for 2-speed P1 applications) into a single current OEM part
• ✅ Same physical mounting footprint as predecessor boards — direct drop-in replacement
• ✅ Coverage: 1997–2005 Sundance® 850 Series (except Maxxus®) + 2006–2009 Jacuzzi® J-400 + 2006–2009 Jacuzzi® J-300 LCD (2-speed P1 configurations)
• ✅ 2 jet-pump outputs: Pump 1 = 2-Speed (Low + High), Pump 2 = 1-Speed
• ✅ Dedicated circulation pump control
• ✅ PermaClear® ozone support – drives the factory-installed PermaClear® sanitation system
• ✅ EPROM Rev 1.28GX+ included (on current replacement revision)
• ✅ Dual jumper banks (JP19 + JP9) – full regional and system-logic configuration, shared across the 6600-728/730/392 LCD platform family
• ✅ 60 Hz / 50 Hz selectable via JP19-3
• ✅ °F / °C selectable via JP19-1
• ✅ LED or incandescent lighting selectable via JP19-5
• ✅ Heater logic selectable (40 A / 50 A / 60 A) via JP9-7 and JP9-11
• ✅ Built-in trouble log (JP9-1) and ILOC support (JP9-3)
• ✅ Compatible with Sundance® 6600-860 topside panel (11-button LCD trapezoid)
• ✅ Backed by 6-month manufacturer’s limited warranty

🔧 Technical Specifications

Specification	Value
OEM Part Number	6600-730
Also Listed As	SD6600-730, SUN6600-730, PCB03766, 6600-730A
Platform	Sundance® 850 / 880 LCD / Jacuzzi® J-400 / J-300 LCD (60 Hz US / North American — also 50 Hz jumper-selectable)
Pump Configuration	Pump 1 = 2-Speed (Low + High), Pump 2 = 1-Speed + circulation pump
Sanitation System	PermaClear® ozone (supported — required for ozone-equipped spas)
Factory EPROM	Rev 1.28GX+ (current replacement revision)
Production Years Covered	1997–2005 Sundance® 850 Series; 2006–2009 Jacuzzi® J-400; 2006–2009 Jacuzzi® J-300 LCD (2-speed P1 configurations)
Replaces (Discontinued)	6600-028 (1997–2005 850 systems with EPROM 1.28GX+ series), 6600-056, 6600-092, 6600-180 (when spa has 2-speed P1 + 1-speed P2)
Same-PCB siblings (different EPROMs)	6600-017, 6600-018, 6600-023, 6600-028 (noted by authorized distributors as “same boards with different EPROMs” — 6600-730 is the current replacement for 6600-028 variants with 2-speed P1)
Companion Board (1-Speed P1 variant)	6600-728 (880 / J-400 / J-300 LCD, Pump 1 = 1-Speed, Pump 2 = 1-Speed)
Companion Board (880 NT 2-pump)	6600-390 (different platform — 2008+ 880 NT)
Companion Board (850 NT Maxxus® 3-pump)	6600-094 (2002–2004 850 NT Maxxus® 3-pump)
Companion Board (880 NT 3-pump)	6600-392 (2005+ 880 NT Maxxus®/Aspen® 3-pump)
Compatible Topside (Sundance)	6600-860 (11-button LCD trapezoid, 2001+ 850/880 LCD)
Non-Returnable	✅ Yes — final sale
Warranty	6-month manufacturer’s limited warranty

📌 Electrical supply voltage is spa-model-specific. Sundance® 850 Series spas typically ship configured for 240 V / 60 Hz service in the US market. The 6600-730 itself is 50/60 Hz jumper-selectable via JP19-3 for potential export configurations, but always verify against your spa’s data plate before connecting power. No universal voltage/amperage rating is published for the bare 6600-730 PCB by the manufacturer — the configuration depends on the specific spa model’s installed heater, pumps, and service supply.

🔗 Compatibility Guide

Covered Sundance® 850 Series Models (2-Speed P1 + 1-Speed P2)

Model	Years	Notes
♨️ Altamar®	1997–2005 (850 Series, 2-speed P1 + 1-speed P2 configuration)	Pre-waterfall era; transitioned to 880 NT platform for 2009+
♨️ Cameo®	1997–2005 (850 Series)	Transitioned to 880 LCD for 2005+ and 880 NT for 2008+
♨️ Capri®	1997–2005 (850 Series)	Transitioned to 880 LCD for 2005+ and 880 NT for ~April 2009
♨️ Marin®	1997–2005 (850 Series)	Extended coverage through Marin® 2002–2006 per some retailer listings
♨️ Optima®	1997–2005 (850 Series)	Transitioned to 880 LCD for 2005+ and 880 NT for 2008+
♨️ Majesta®	1997–2005 (850 Series)	Transitioned to 880 NT for ~April 2009

⚠️ Sundance® Maxxus® is EXCLUDED from 6600-730 coverage. Maxxus® 3-pump systems require a different board (6600-094 for 2002–2004 850 NT Maxxus® / 6600-392 for 2005+ 880 NT Maxxus®/Aspen®).

Covered Jacuzzi® J-400 Series Models (2006–2009, 2-Speed P1 Configurations)

Model	Years	Notes
♨️ J-460	2006–2009	2-speed P1 + 1-speed P2 configuration
♨️ J-465	2006–2009	2-speed P1 + 1-speed P2 configuration
♨️ J-470	2006–2009	2-speed P1 + 1-speed P2 configuration
♨️ J-480	2006–2009	2-speed P1 + 1-speed P2 configuration

Covered Jacuzzi® J-300 LCD Series Models (2-Speed P1 Configurations)

Platform	Years	Notes
♨️ J-300 LCD Series 2-Pump 2-Speed P1	2006–2009	J-300 LCD Display spas with 2-speed Pump 1 + 1-speed Pump 2

📌 Jacuzzi® J-400 and J-300 LCD note: Both the 6600-730 (this board) and the 6600-728 cover the Jacuzzi® J-400 and J-300 LCD Series from 2006–2009. The difference is Pump 1 speed: use the 6600-730 if Pump 1 is 2-speed; use the 6600-728 if Pump 1 is 1-speed. Verify your existing pump configuration before ordering.

Boards Replaced by the 6600-730

Discontinued OEM	Production Era	Notes	Status
6600-028	1997–2005 (original)	850 systems, 1 and 2-pump with PermaClear® (EPROM Rev 1.28GX+)	Discontinued → 6600-730
6600-056	Intermediate revision	850 LCD 2-speed P1 variant	Discontinued → 6600-730
6600-092	Later revision	850 LCD 2-speed P1 variant	Discontinued → 6600-730
6600-180	Intermediate replacement	When used to replace 6600-028/056/092 on spas with 2-speed P1 + 1-speed P2	Discontinued → 6600-730
PCB03766	Distributor alternate PN	Same as 6600-730	Current → 6600-730
6600-730A	Distributor variant listing	Same current OEM as 6600-730	Current → 6600-730

💡 Same-PCB-different-EPROM note: Authorized distributors note that 6600-017, 6600-018, 6600-023, 6600-028 are the same physical PCB with different EPROMs installed. The 6600-730 is the current-OEM successor for the 6600-028 variant (1997–2005 850 LCD Series with PermaClear® and 2-speed P1). The 6600-017/018/023 variants (non-PermaClear® Original 850 Series configurations) are covered by a separate catalog entry.

Companion Boards on Same 850/880 LCD Platform (Pump Configuration Matrix)

Part Number	Pump Configuration	Coverage	Notes
6600-730 (THIS BOARD)	Pump 1 = 2-Speed, Pump 2 = 1-Speed	850 / 880 LCD / J-400 / J-300 LCD (2-speed P1 variant)	Current OEM
6600-728	Pump 1 = 1-Speed, Pump 2 = 1-Speed	880 / J-400 / J-300 LCD (2 × 1-speed variant)	Current OEM
6600-392	3-Pump	880 NT Maxxus®/Aspen®	Current OEM
6600-094	3-Pump	850 NT Maxxus® 2002–2004	Current OEM

Compatible Topside Panel

Topside PN	Platform	Description
Sundance® 6600-860	850/880 LCD Series	11-button trapezoid LCD topside — used across 2001+ 850/880 LCD spas (explicitly compatible with 6600-728, 6600-180, 6600-098, 6600-161, 6600-730, 6600-028, 6600-056, 6600-092 circuit boards)

NOT Compatible — Use a Different Board

Your spa	Correct Replacement
❌ Both pumps are 1-speed (Pump 1 and Pump 2 both single-speed)	6600-728
❌ Sundance® 850 NT Maxxus® 3-pump (2002–2004)	6600-094
❌ Sundance® 880 NT Maxxus® or Aspen® 3-pump (2005+)	6600-392
❌ 2008+ Sundance® 880 NT System 2-pump (uses 6600-854 / 6600-882 / 6600-425 topside, NOT 6600-860)	6600-390
❌ Pre-1997 Sundance® 800 Series	Different legacy board — contact Parts4Tubs for identification
❌ Original 850 Series WITHOUT PermaClear® (6600-017/018 family)	6600-018 (850 Series no-circ without PermaClear®)
❌ 2014–2015 Jacuzzi® J-300 LED Series (distinct from J-300 LCD)	6600-297 (2-pump) or 6600-296 (1-pump)
❌ 2016+ J-300 Series	6600-784 (2-pump) or 6600-786 (1-pump)
❌ Jacuzzi® J-400 Mid 12/2009+ (post-LCD platform)	J-1000 load box or platform-specific successor
❌ Sundance® 680 / 780 Series (LX-15 / Sweetwater platform)	6600-720 (no circ) or 6600-726 (with circ)

🎛️ Board Functions & Controls

Jumper Bank JP19 — Regional / Display Configuration

Jumper	Function	ON	OFF
JP19-1	Temperature display	Celsius (°C)	Fahrenheit (°F) — US default
JP19-3	Supply frequency	50 Hz (Export)	60 Hz (US / North American default)
JP19-5	Lighting type	LED	Incandescent
JP19-7	NOT USED	—	—
JP19-9	NOT USED	—	—
JP19-11	NOT USED	—	—

Jumper Bank JP9 — System Logic Configuration

Jumper	Function	ON	OFF
JP9-1	Trouble Log	Enabled	Disabled
JP9-3	ILOC (Interlock)	Enabled	Disabled
JP9-5	NOT USED	—	—
JP9-7	60 A Logic	Allows 2 Pumps on with Heater	OFF = 50 A Logic (forces Heater OFF when more than 1 Pump is ON)
JP9-9	Pump 2 enable (on 6600-728 and 6600-730)	Pump 2 enabled (2 Pump Logic)	Pump 2 disabled (1 Pump Logic)
JP9-11	40 A Logic	Forces Heater OFF with any Pump in Hi	Disabled
JP9-13	Blower + Pump logic	Only 1 Pump with Blower operates at a time	Blower, Pump 1, Pump 2 can operate simultaneously
JP9-15	Factory Reset	Recall All Factory Settings (momentary use only)	Must remain OFF during normal operation

📌 Important JP9-7 / JP9-11 note — Heater logic by service size:

Service Size	JP9-7	JP9-11	Behavior
60 A service	ON	OFF	Allows 2 pumps on with heater (most powerful configuration)
50 A service	OFF	OFF	Forces heater OFF when more than 1 pump is ON
40 A service	OFF	ON	Forces heater OFF with ANY pump in high speed

Mis-setting these jumpers can cause nuisance breaker tripping or heater inefficiency. Verify your spa’s data plate service rating before setting JP9-7 and JP9-11.

📌 JP9-15 warning: The factory reset jumper is for momentary use only during initial setup or troubleshooting. Leaving it in the ON position during normal operation will cause the board to repeatedly reload factory settings on every power cycle. Always return this jumper to OFF after use.

📌 JP9-9 shared-jumper note: Per the documented jumper reference, JP9-9 enables “Pump 2 on -728/-730 pcb’s and Pump 3 on -392 pcb”. On the 6600-730 (this board), JP9-9 ON enables Pump 2. This convention is shared across the 6600-728, 6600-730, and 6600-392 boards with different pump-number semantics per board.

Pump 1 Speed Selection

Pump 1 on the 6600-730 is 2-speed by design — the board has the hardware to drive both low-speed (circulation/filter) and high-speed (jet) modes for Pump 1. The 2-speed operation is controlled by the topside panel’s Jets 1 button (typically: first press = Low, second press = High, third press = Off).

If your spa has a 1-speed Pump 1 configuration, the 6600-730 is NOT the correct board — use the 6600-728 instead.

Controlled Outputs

Output	Function
Pump 1	Primary jet pump — 2-Speed (Low / High, per 850/880 LCD factory configuration)
Pump 2	Secondary jet pump — 1-Speed (enabled via JP9-9 ON = 2 Pump Logic)
Circulation Pump	Dedicated 24-hour circ pump
Heater	Flow-through heater (per spa’s factory configuration, logic-switched per JP9-7/JP9-11)
PermaClear® Ozone	Supported
Blower	Supported (interacts with Pump logic per JP9-13)
Spa Lighting	LED or incandescent (selectable via JP19-5)
Topside Interface	Sundance® 6600-860

🛠️ Installation Requirements

⚠️ IMPORTANT: Hot tub circuit board installation must be performed by a licensed electrician in compliance with NEC (National Electrical Code) Article 680 and all local codes. A permit may be required in your jurisdiction.

Pre-Installation Checklist

• [ ] Confirm your spa is a Sundance® 850 Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, or Majesta® — 1997–2005, NOT Maxxus®) OR a Jacuzzi® J-460/J-465/J-470/J-480 (2006–2009) OR a Jacuzzi® J-300 LCD Series (2006–2009)
• [ ] Confirm your spa has Pump 1 = 2-Speed AND Pump 2 = 1-Speed. If Pump 1 is 1-speed, you need the 6600-728 instead.
• [ ] Confirm your spa has PermaClear® ozone sanitation and a dedicated circulation pump
• [ ] Note your existing board’s part number (6600-028, 6600-056, 6600-092, 6600-180, or 6600-730)
• [ ] Confirm your existing topside is the Sundance® 6600-860 (11-button LCD trapezoid)
• [ ] Identify your spa’s electrical service rating (40 A / 50 A / 60 A) — this determines JP9-7 / JP9-11 jumper settings
• [ ] Disconnect all power at the main breaker and the external GFCI disconnect box
• [ ] Wait at least 5 minutes for capacitors to fully discharge
• [ ] Photograph every wire, harness, and connector position before removing the old board
• [ ] Photograph both jumper banks (JP19 and JP9) on the old board if visible — this preserves your current configuration for transfer to the new board
• [ ] Inspect the temperature / hi-limit sensor assembly and circulation pump for wear

Electrical Requirements (US)

Requirement	Specification
Supply Voltage	Per spa data plate (typically 240 V / 60 Hz for US 850 LCD / J-400 / J-300 LCD models)
Frequency	60 Hz (US standard — verify JP19-3 is OFF)
GFCI Protection	Required (NEC Article 680)
Ground / Bonding	Mandatory equipment grounding and bonding per NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Required within line of sight of spa (per NEC)
Wire Gauge	Per spa data plate and NEC ampacity tables

💡 Installation tip: The 6600-730 is visually and physically very similar to its 1-speed-P1 sibling (6600-728) — same mounting footprint, same jumper banks. The key internal difference is the Pump 1 relay configuration for 2-speed operation. When transferring Pump 1 wiring from your old board, carefully label the Low-speed and High-speed connections — installing them reversed will cause the pump to run in the wrong speed mode for each button press on the topside.

⚠️ Safety Warnings

Electrical Safety

• ⚠️ ALWAYS disconnect power at both the main breaker and the exterior GFCI disconnect box before any work
• ⚠️ Licensed electrician only — NEC Article 680 and most US local codes require it
• ⚠️ Verify GFCI protection is installed and tested
• ⚠️ Equipment grounding and bonding must comply with NEC Article 680
• ⚠️ Never operate the spa with the electrical compartment cover removed

Jumper Configuration Safety

• ⚠️ Verify JP9-7 / JP9-11 heater logic matches your spa’s service rating — 60 A, 50 A, or 40 A. Incorrect settings can cause nuisance breaker tripping or inefficient heating.
• ⚠️ Verify JP19-3 is OFF for US 60 Hz operation before energizing
• ⚠️ JP9-15 must remain OFF after factory reset use — leaving it ON causes repeated factory resets on every power cycle
• ⚠️ Verify JP19-1 matches your regional preference (OFF for °F in US default)
• ⚠️ Verify JP9-9 is ON to enable Pump 2 operation

Platform / Pump Configuration Safety

• ⚠️ Do NOT install the 6600-730 on a spa with two 1-speed pumps — use the 6600-728 instead
• ⚠️ Do NOT install the 6600-730 on a Sundance® Maxxus® or Aspen® 3-pump spa — Maxxus® and Aspen® are explicitly excluded from 6600-730 coverage. Use the 6600-094 (850 NT Maxxus 2002–2004) or 6600-392 (880 NT Maxxus/Aspen 2005+) instead.
• ⚠️ Do NOT install the 6600-730 on an 880 NT System spa (different topside family: 6600-854 / 6600-882 / 6600-425) — use the 6600-390 (2-pump) or 6600-392 (3-pump) instead
• ⚠️ Do NOT install the 6600-730 on an Original 850 Series spa without PermaClear® — the 6600-017/018 family covers no-PermaClear® configurations
• ⚠️ Do NOT pair this board with any topside other than the Sundance® 6600-860 — the LCD topside is the correct match for the 6600-730 Sundance® 850 LCD platform

Water & Electrical Safety

• ⚠️ Ensure no water ingress into the control box during installation
• ⚠️ Inspect all gaskets and seals; replace if damaged
• ⚠️ Never touch any electrical component with wet hands

Post-Installation

• ⚠️ Verify the topside panel displays correctly on first power-up
• ⚠️ Confirm Pump 1 operates at both Low AND High speeds (this is the primary functional test for the 2-speed P1 configuration)
• ⚠️ Confirm Pump 2 operates at its single speed
• ⚠️ Confirm the circulation pump starts and runs continuously
• ⚠️ Verify the PermaClear® ozone module activates during filter cycles
• ⚠️ Test the hi-limit function and GFCI trip before allowing bathers in the spa
• ⚠️ Monitor for fault codes during the first 24 hours of operation

🔍 Error Codes & Troubleshooting

Common Sundance® 850/880 LCD / Jacuzzi® J-400 LCD Platform Codes

Code	Meaning	Basic Troubleshooting
FLO	Pressure / flow switch fault	Clean filter; check plumbing blockages; inspect flow switch
OH / OHH / OHS	Overheating detected	Allow water to cool; verify circulation pump flow; check temperature sensor
Sn1	Hi-limit sensor malfunction	Check sensor connection; reset spa; replace sensor if faulty
Sn3	Heater deactivated	Inspect heater breaker; test heater element continuity; verify JP9-7/JP9-11 logic matches service
TH1 / TH2 / TH3	Temperature probe failure	Test sensor resistance; replace temperature sensor
ICE	Freeze-risk condition detected	Verify heater function; raise setpoint; check ambient temperature
Cool	Water temperature more than 20°F below setpoint	Verify heater operation; confirm heater breaker
HFL	Heater flow / sensor discrepancy	Clean filter; verify circ flow; inspect temperature sensors
Pump 1 Low-speed not running	Wiring reversed between Low/High connections, or Pump 1 motor internal fault	Verify Pump 1 Low and High wiring on board; test pump motor
Pump 2 not responding	JP9-9 mis-configured or topside command issue	Verify JP9-9 = ON (2 Pump Logic); verify topside button response

Trouble Log

The 6600-730 includes a built-in trouble log (enabled via JP9-1 = ON). When enabled, the board logs fault events that can be retrieved through the topside panel’s diagnostic menu.

⚠️ Fault code behavior may vary based on specific Sundance® 850 or Jacuzzi® J-400 / J-300 LCD model year and topside firmware revision.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ 1997–2005 Sundance® 850 Altamar®, Cameo®, Capri®, Marin®, Optima®, or Majesta® with 2-speed P1 + 1-speed P2	✅ Direct OEM replacement	Configure jumpers per spa service size; Maxxus® excluded
♨️ 2006–2009 Jacuzzi® J-460, J-465, J-470, J-480 with 2-speed P1 configuration	✅ Direct OEM replacement	Pair with Sundance® 6600-860 or Jacuzzi® LCD topside
♨️ 2006–2009 Jacuzzi® J-300 LCD with 2-speed P1 configuration	✅ Direct OEM replacement	J-300 LCD Display platform
♨️ Spa with discontinued 6600-028, 6600-056, or 6600-092 board (2-speed P1 variant)	✅ OEM upgrade replacement	Current revision with EPROM Rev 1.28GX+
♨️ Spa with 6600-180 board that originally replaced a 6600-028/056/092 (on 2-speed P1 spa)	✅ OEM upgrade replacement	Current-generation replacement
🛁 Spa with two 1-speed pumps	❌ Not compatible	Use 6600-728
🛁 Sundance® Maxxus® or Aspen® 3-pump	❌ Not compatible	Use 6600-094 (850 NT Maxxus 2002–2004) or 6600-392 (880 NT Maxxus/Aspen 2005+)
🛁 880 NT System (post-2008 platform)	❌ Not compatible	Use 6600-390 (2-pump) or 6600-392 (3-pump)
🛁 Original 850 Series without PermaClear®	❌ Not compatible	Use 6600-018

🤔 Frequently Asked Questions

Q: How do I know if I need the 6600-730 or the 6600-728? A: The decisive factor is Pump 1 speed:

• 6600-730 (this board): Pump 1 = 2-Speed + Pump 2 = 1-Speed
• 6600-728: Pump 1 = 1-Speed + Pump 2 = 1-Speed

Multiple authorized distributors summarize the rule as: “If 850 Series (1999–2005) or if Pump 1 is 2-speed, use 6600-730. If 880 Series (2005–2010) or if Pump 1 is 1-speed, use 6600-728.” The easiest way to verify is to check your topside panel — when you press the Jets 1 button, does it cycle through Low speed → High speed → Off (2-speed = 6600-730), or just On → Off (1-speed = 6600-728)?

Q: My spa is a 2003 Sundance® Optima®. Is this the right board? A: Most likely yes, if Pump 1 is 2-speed and your existing board is a 6600-028, 6600-056, 6600-092, or 6600-180. 2003 Optima® is within the 1997–2005 850 Series coverage for the 6600-730. Verify the 2-speed P1 configuration before ordering.

Q: My existing board is a 6600-028 with EPROM Rev 1.28GX. Will the 6600-730 work? A: Yes. The 6600-028 is discontinued and the 6600-730 is the factory-designated current replacement, shipped with EPROM Rev 1.28GX+. The new board has the same mounting footprint. You may need to configure the JP19 and JP9 jumpers on the new board to match your spa’s operating logic — see the Board Functions section above.

Q: My board label says 6600-017, 6600-018, or 6600-023. Can I use the 6600-730? A: Probably not directly. Per authorized distributors: “6600-017, 6600-018, 6600-023, 6600-028 are the same boards with different EPROMs.” However, the 6600-730 is specifically designed as the current replacement for the 6600-028 EPROM/configuration (1997–2005 850 Series with PermaClear® and 2-speed P1). The 6600-017/018/023 variants are Original 850 Series configurations that may have different chip codes and may not have PermaClear®. Contact Parts4Tubs with your specific board’s full label and spa model before ordering — for no-PermaClear® configurations, the 6600-018 catalog entry is typically the correct current replacement, not the 6600-730.

Q: My Sundance® spa is a Maxxus®. Is this the right board? A: No. Maxxus® is EXPLICITLY EXCLUDED from 6600-730 coverage (authorized distributor documentation: “for all Sundance Spas models except Maxxus”). Maxxus® is a 3-pump spa and requires a 3-pump board:

• 2002–2004 850 NT Maxxus®: Use 6600-094 (Maxxus® 850 NT 3-pump)
• 2005+ 880 NT Maxxus® or Aspen®: Use 6600-392 (Maxxus®/Aspen® 880 NT 3-pump)

Q: My existing board is a 6600-180. Is that the same as the 6600-730? A: Not exactly. The 6600-180 was a board Sundance® used to replace any of the older boards (6600-028, 6600-056, 6600-092 for 2-speed P1 spas OR 6600-098, 6600-161 for 2 × 1-speed spas). Because the 6600-180 served both pump configurations, knowing which configuration your specific 6600-180 was installed on determines the current replacement:

• If your 6600-180 was on a spa with 2-speed P1 + 1-speed P2 → use the 6600-730 (this board)
• If your 6600-180 was on a spa with two 1-speed pumps → use the 6600-728

Check your spa’s pump configuration (not just the existing board part number) to determine the correct current replacement.

Q: What topside panel works with this board? A: The Sundance® 6600-860 (11-button LCD trapezoid topside) is the matching panel for the 6600-730. This topside is explicitly compatible with the entire 850/880 LCD platform board family (6600-728, 6600-180, 6600-098, 6600-161, 6600-730, 6600-028, 6600-056, 6600-092). If your existing topside is functional, retain it.

Q: What jumper setting do I use for JP9-7 and JP9-11? A: These depend on your spa’s electrical service size (shown on the data plate):

• 60 A service: JP9-7 = ON, JP9-11 = OFF — allows 2 pumps on with heater
• 50 A service: JP9-7 = OFF, JP9-11 = OFF — forces heater off when more than 1 pump is on
• 40 A service: JP9-7 = OFF, JP9-11 = ON — forces heater off with any pump on high speed

Setting the wrong logic can cause nuisance breaker tripping or insufficient heating.

Q: Can I install the 6600-730 on an 880 NT Optima® from 2010? A: No. A 2010 Optima® is on the 880 NT platform (not the 850/880 LCD platform). The 880 NT platform uses the 6600-390 (2-pump) or 6600-392 (3-pump) with different topsides (6600-854 / 6600-882 / 6600-425). Compare your existing board’s part number (should be 6600-164 or 6600-176 for NT) and topside before ordering.

Q: Is this board also sold as PCB03766 or 6600-730A? A: Yes. PCB03766 and 6600-730A are distributor-variant listings for the same current 6600-730 OEM product. SD6600-730 and SUN6600-730 are also used as distributor-format prefixes.

Q: Do I need a licensed electrician to install this? A: Yes. NEC Article 680 and most US local jurisdictions require a licensed electrician for all hot tub electrical work, and a permit may be required.

Q: Is this an OEM or aftermarket board? A: The 6600-730 is the genuine OEM Sundance® / Jacuzzi® replacement board, factory-new with EPROM Rev 1.28GX+ pre-installed.

Q: What warranty is included? A: The board carries the manufacturer’s 6-month limited warranty. Contact Parts4Tubs for full warranty terms.

✅ Why Choose the 6600-730

• ✅ Genuine OEM Sundance® / Jacuzzi® replacement – factory-new with EPROM Rev 1.28GX+
• ✅ Consolidates the discontinued 6600-028 / 6600-056 / 6600-092 / 6600-180 (2-speed P1) chain into one current part
• ✅ Same physical footprint as predecessors — direct drop-in
• ✅ Comprehensive JP19 + JP9 jumper banks for full regional and system-logic customization
• ✅ Full PermaClear® ozone and circulation pump support
• ✅ Broad model-year compatibility across Sundance® 850 LCD (1997–2005) and Jacuzzi® J-400 / J-300 LCD Series (2006–2009)
• ✅ 2-speed Pump 1 + 1-speed Pump 2 configuration
• ✅ Backed by the Sundance® / Jacuzzi® 6-month manufacturer’s limited warranty

🇺🇸 Why Buy From Parts4Tubs

• ✅ Fast US shipping
• ✅ Expert pump-speed disambiguation help — the #1 ordering confusion for the 6600-730 is between 2-speed Pump 1 (this board) and 1-speed Pump 1 (uses 6600-728). Send us photos of your existing board and topside and a description of how your Jets 1 button behaves (Low → High → Off = 2-speed, correct for this board), and we’ll confirm the correct current replacement before you order.
• ✅ Expert platform disambiguation — 850/880 LCD (this board) vs 880 NT (uses 6600-390/392) — same model names (Optima®, Cameo®, Altamar®) span BOTH platforms
• ✅ Legacy chain expertise — we handle the 6600-028 → 6600-056 → 6600-092 → 6600-180 → 6600-730 transition, including the same-PCB-different-EPROM relationships in the 6600-017/018/023/028 family
• ✅ Competitive pricing on current OEM boards
• ✅ Full manufacturer warranty support
• ✅ Matching companion parts in stock — 6600-860 Sundance® topside panel, temperature and hi-limit sensors, circulation pumps, PermaClear® UV lamps, and related 850/880 LCD / J-400 LCD service parts
• ✅ Platform-history expertise across seven generations of Sundance® 850/880 circuit boards (Original 850 Series → 850 NT → 850/880 LCD → 880 NT → 880 SunTouch™ → Post-SunTouch™, plus parallel LX-15 / Sweetwater and Jacuzzi® J-Series platforms)

⭐ Summary

The Sundance® / Jacuzzi® 6600-730 is the current OEM replacement circuit board for 1997–2005 Sundance® 850 Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, Majesta® — excluding Maxxus®) and 2006–2009 Jacuzzi® J-400 Series (J-460, J-465, J-470, J-480) and Jacuzzi® J-300 LCD Series hot tubs with a 2-Speed Pump 1 + 1-Speed Pump 2 configuration, PermaClear® ozone sanitation, and a dedicated circulation pump. It consolidates multiple discontinued predecessor boards — 6600-028 (1997–2005, EPROM Rev 1.28GX+), 6600-056, 6600-092, and the intermediate 6600-180 (for 2-speed P1 applications) — into a single current OEM part, and is also listed as SD6600-730, SUN6600-730, PCB03766, or 6600-730A. Features comprehensive JP19 (regional/display) and JP9 (system logic including 40 A / 50 A / 60 A heater logic) jumper banks shared with the 6600-728 (1-speed P1 sibling) and 6600-392 (3-pump Maxxus®/Aspen® variant). Pair with the Sundance® 6600-860 11-button LCD topside panel. For two 1-speed pumps, use the companion 6600-728; for 880 NT platform spas, use the 6600-390 or 6600-392; for 850 NT Maxxus® 3-pump, use the 6600-094; for 880 NT Maxxus®/Aspen® 3-pump, use the 6600-392. Not compatible with Maxxus®, Aspen®, 880 NT platform, or Original 850 Series without PermaClear®. Non-returnable; 6-month manufacturer’s limited warranty.

Finding and identifying a replacement Hot Tub Circuit Board (PCB)

If you are looking to replace a failed PCB on your Hot Tub’s spa pack, then quite often identifying the part that you need can be the hardest thing.

Firstly, you are looking for a model number on the actual circuit board itself. Having the model or serial of your hot tub is not going to help at this point, you need to find the number on the PCB itself.

Now, with certain brands of PCB, the number of the replacement PCB that you need is not going to match identically the one you are replacing. Why is that I hear you ask?

Well, normally, it is an updated version. This means that it might have updated firmware on the PCB or be a later revision. Normally, this means that the part number would be slightly different. This is usually indicated with a “12345678 -x” at the end of that part number where x indicated a firmware revision.

In some cases, there will be some following letters on the part number of the circuit board, “12345678 -x MAS” this can indicate that the PCB was used for an OEM meaning it was produced for a certain hot tub manufacturer and the letters identify the manufacturer.

This means if you source an original PCB, it will not have the letters, but will in most cases work just fine.

It can be confusing I know!

What if you can’t find a model number?

If you can’t find a model number on the PCB itself, then you need to look for a model number on the spa pack. Normally, there is a sticker on the outside of the spa pack that tells you the current ratings and input voltages etc and this will have a model number.

In general, most spa packs in the USA are manufactured by Balboa, Hydro-Quip, ACC or Gecko. I know I am generalising here, but if you have a spa pack that has the brand of your hot tub on, it will be an OEM so the key is identifying who made the original box.

From there, you can normally find an original PCB that you will be able to switch out.

For example, the Balboa VS (value series) is a very popular spa pack that has been used by multiple hot tub manufacturers under their own brand names. Whatever they have called it, strip it back and it is still a Balboa VS.

Visual Inspection

One of the most important things you can do when you are looking for a replacement is to visually inspect the PCB that you have versus the picture online of the replacement you are considering. They need to look the same even if there are the differences in firmware revisions or OEM part numbers, you should be visually replacing a PCB that looks like the one you have.

Configuring a replacement Hot Tub Circuit Board (PCB)

When you get a new PCB, you are more than likely going to need to configure it. Most PCBs have a number of different modes and setups that the can operate in. For this, you will need to manual or spec sheet to guide you.

For things like DIP switches, most of the time you can copy the settings from your original circuit board. You are looking for things like setting the voltage as a lot of PCBs can be configured to run on both 115V and 230V.

You may need to move jumpers or even wires to configure voltages – the key here is that you read the schematic and don’t expect the PCB to just work out of the box – it usually doesn’t.

Troubleshooting a Hot Tub Circuit Board (PCB)

Here are some common things you will see when you replace a PCB on a hot tub.

You press the buttons on the topside control and they don’t control the right parts (pumps or blower etc) – this is a mode configuration thing and you will either need to change some DIP switches on the PCB or an internal or low level programming mode on the topside control. Check the manual for how to do this.

You turn on the hot tub and it trips the breaker – it is not common for a new PCB to fail out of the box (I have not seen one yet!) However, a common mistake is that the voltage has not been set correctly. If it is set for 115V and then you try and turn it on, the current draw will be a lot more (twice) than expected and the breaker will trip.

To check this, unplug all of your kit – heater, pumps, blower and then turn on the PCB. If it trips with nothing plugged in, usually the voltage is incorrectly set and what is happening is that live current is being sent to the ground – because you have 4 wires into the PCB rather than 3. Current on the ground loop causes the trip. Check the settings to make sure it is configures for 230V.

It might not trip until you physically turn on a pump or a blower. As mentioned, if the pack is set to 115V and your pump is meant for 230V, it will draw twice the current at half the voltage and trip your breaker. Check the manual for info on how to set the voltage.