⚙️ Sundance® / Jacuzzi® 6600-390 880 NT System Spa Circuit Board (2-Pump with PermaClear®)

The current OEM replacement PCB for 2008+ Sundance® / Jacuzzi® 880 NT System hot tubs with PermaClear® sanitation and 2-pump configuration.

📋 Product Overview

The Sundance® / Jacuzzi® 6600-390 is the current OEM main circuit board for 2008+ Sundance® 880 NT Systems with a 2-pump configuration and PermaClear® sanitation. This board was introduced as the successor to the earlier 6600-164 and 6600-176 boards, and today it is the correct replacement for every 880 NT 2-pump spa across a long production run — Optima® and Cameo® starting early 2008, plus Majesta®, Altamar®, Marin®, and Capri® starting approximately May 2009, continuing through the 2014–2015 model years. Factory-supplied with IC Processor Revision 1.1A, the 6600-390 delivers updated processor logic that supersedes the earlier 6600-176 (IC Processor Rev. 1.01) and the original 6600-164.

The 880 NT (New Technology) platform is a distinct control architecture from the earlier 880 LCD platform — a critical distinction when ordering replacement parts. The 6600-390 controls two jet pumps, the dedicated 24-hour PermaClear® Hi-Flow circulation pump, the spa heater, ozonator, lighting, and topside communications. The board is engineered for 880 NT-specific topside panels that vary by spa manufacturing date (6600-854 for 2009 – 05/2012, 6600-882 from 06/2012, and 6600-425 for 2013 – 2015), and pairs with the 6600-392 companion board used on 3-pump Maxxus® and Aspen® NT systems.

⚠️ This board is NOT compatible with older (pre-2008) NT system boards. The 6600-390 represents a processor redesign — confirm your spa’s year and original board part number before ordering. ⚠️ This board is 2-Pump only. For 3-Pump Maxxus® or Aspen® NT systems, use the 6600-392 instead. ⚠️ This board is for 880 NT Systems only. For 880 LCD Series spas (which use the 6600-860 trapezoid topside and 6600-098 / 6600-161 / 6600-180 board family), use the 6600-728 (1-speed Pump 1) or 6600-730 (2-speed Pump 1) instead.

✨ Key Features

• ✅ Current OEM Sundance® / Jacuzzi® replacement – factory-new with IC Processor Rev. 1.1A installed
• ✅ Direct replacement for discontinued 6600-164 and 6600-176 – same mounting footprint and harness layout
• ✅ 880 NT System 2-Pump with PermaClear® coverage – Optima®, Cameo®, Majesta®, Altamar®, Marin®, Capri® across 2008 – current production
• ✅ Dedicated PermaClear® Hi-Flow circulation pump control – 24-hour operation with programmable filter cycles
• ✅ 2 jet-pump outputs – standard 880 NT 2-pump configuration
• ✅ Updated processor logic – supersedes IC Processor Rev. 1.01 (6600-176) and the original 6600-164
• ✅ LCD topside communication – supports 6600-854, 6600-882, and 6600-425 880 NT topside panels (match by spa year)
• ✅ Built-in spa lighting control – drives OEM 880 Series lighting
• ✅ Ozonator output – supports factory-installed OEM ozonator
• ✅ Covered by manufacturer’s limited warranty

🔧 Technical Specifications

Specification	Value
OEM Part Number	6600-390
Also Listed As	SD6600-390
Platform	Sundance® 880 NT (New Technology) Control System
Spa Configuration	2-Pump with PermaClear®
Processor	IC Processor Rev. 1.1A
Model Year Coverage	2008+ (Optima® / Cameo® from early 2008; Majesta® / Altamar® / Marin® / Capri® from approx. May 2009)
Pump Outputs	2 jet pumps + PermaClear® Hi-Flow circulation pump
Circulation Pump	PermaClear® Hi-Flow required
Compatible Topsides	6600-854 (2009 – 05/2012), 6600-882 (06/2012+), 6600-425 (2013 – 2015) – select by spa manufacturing year
Companion Board	6600-392 (3-Pump Maxxus® / Aspen® NT variant)
Replaces (Discontinued)	6600-164 (original), 6600-176 (IC Processor Rev. 1.01)
Backwards Compatibility	Not compatible with older (pre-2008) NT system boards
Non-Returnable	✅ Yes — final sale
Warranty	Manufacturer’s limited warranty

📌 Electrical supply voltage is spa-model-specific. Sundance® 880 NT spas typically ship configured for 240 V / 60 Hz service in the US market, but your spa’s specific electrical configuration is listed on the data plate inside the equipment bay. Always verify against your data plate before connecting power. No universal voltage/amperage rating is published for the bare 6600-390 PCB by the manufacturer, because the configuration depends on the spa model’s installed heater, pumps, and service supply.

🔗 Compatibility Guide

Covered Sundance® 880 NT System Models (2-Pump with PermaClear®)

Model	Manufacturing Start	Notes
♨️ Optima®	Early 2008+	2-Pump 880 NT with PermaClear®
♨️ Cameo®	Early 2008+	2-Pump 880 NT with PermaClear®
♨️ Majesta®	Approximately May 2009+	2-Pump 880 NT with PermaClear®
♨️ Altamar®	Approximately May 2009+	2-Pump 880 NT with PermaClear®
♨️ Marin®	Approximately May 2009+	2-Pump 880 NT with PermaClear®
♨️ Capri®	Approximately May 2009+	2-Pump 880 NT with PermaClear®

Boards Replaced by the 6600-390

Discontinued OEM	Processor Revision	Status
6600-164	Original	Discontinued — replaced by 6600-176 approximately May 2012
6600-176	IC Processor Rev. 1.01	Discontinued — replaced by 6600-390

Matching Topside Panels (by Spa Manufacturing Year)

Topside PN	Years	Description
6600-854	2009 – 05/2012	880 Series 2-Pump 12-button LED trapezoid topside, 12.5″ × 4.75″ — used on Aspen® 2012, Marin® 2010-2012, Majesta®/Altamar®/Cameo®/Optima®/Maxxus® 2009-2012
6600-882	06/2012+	Intermediate 880 Series topside introduced June 2012
6600-425	2013 – 2015	880 Series 2 or 3 Pump LCD topside with 7′ cord — used on Aspen®, Marin®, Majesta®, Altamar®, Cameo®, Optima®, Maxxus® 2013-2015

⚠️ Match the topside panel to your spa’s manufacturing year. The topside harness and connector configuration changed between revisions — double-check your existing panel’s part number and connector types before ordering a replacement topside alongside the 6600-390 board.

Companion Board for 3-Pump Configurations

Part Number	Description
6600-392	880 NT System 3-Pump with PermaClear® — Maxxus® and Aspen® models (IC Processor Rev. 3.1A); replaces discontinued 6600-155, 6600-160, 6600-398

NOT Compatible — Use a Different Board

Your spa	Correct Replacement
❌ Sundance® 880 LCD Series (uses 6600-860 trapezoid topside, LCD display)	6600-728 (1-speed Pump 1) or 6600-730 (2-speed Pump 1, 850/880 LCD)
❌ Sundance® 880 NT Maxxus® / Aspen® 3-Pump	6600-392
❌ Pre-2008 NT system boards	The 6600-390 is not backward-compatible with pre-2008 NT boards – contact Parts4Tubs to identify the correct legacy replacement
❌ Sundance® 680 / 780 Series (LX-15 / Sweetwater platform)	6600-720 (no circ) or 6600-726 (with circ)
❌ Jacuzzi® J-400 LCD Series	6600-728 (2006 – Mid 12/2009) or J-1000 load box (Mid 12/2009+)
❌ Jacuzzi® J-300 LED 2014-2015	6600-297 (2-pump) or 6600-296 (1-pump)

🎛️ Board Functions & Controls

Controlled Outputs

Output	Function
Pump 1	Primary jet pump (per 880 NT factory configuration)
Pump 2	Secondary jet pump (per 880 NT factory configuration)
Circulation Pump	PermaClear® Hi-Flow 24-hour circ pump
Heater	880 NT flow-through heater (per spa model’s installed heater)
Ozonator	Supported (per spa’s factory configuration)
Spa Lighting	Factory OEM 880 Series LED / incandescent lighting
Topside Interface	880 NT topside communication (panel varies by year)

Platform Notes

The 880 NT platform is a purpose-built Sundance® architecture distinct from the 880 LCD platform used on 2005 – Mid 12/2009 Altamar®, Cameo®, Capri®, Marin®, Optima®, and Majesta® spas. The two platforms are not interchangeable:

• 880 LCD platform: 6600-098 / 6600-161 / 6600-180 → current 6600-728 (1-speed P1) or 6600-730 (2-speed P1), paired with 6600-860 trapezoid LCD topside
• 880 NT platform (this board): 6600-164 / 6600-176 → current 6600-390 (2-pump) or 6600-392 (3-pump Maxxus/Aspen), paired with 6600-854 / 6600-882 / 6600-425 topsides

If you are not sure which platform your 880 Series spa uses, compare your topside panel shape and your existing board’s part number against the compatibility guide above, or contact Parts4Tubs for help.

🛠️ Installation Requirements

Pre-Installation Checklist

• [ ] Confirm your spa is a Sundance® 880 NT System (not 880 LCD) — your existing board should be labeled 6600-164 or 6600-176 if it is NT
• [ ] Confirm your spa has a 2-pump configuration (for 3-pump Maxxus®/Aspen® use 6600-392)
• [ ] Confirm your spa has the PermaClear® Hi-Flow circulation pump
• [ ] Note your existing board’s part number and your topside panel’s part number
• [ ] 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
• [ ] Inspect the temperature and hi-limit sensors — replace if aging or corroded
• [ ] Inspect the PermaClear® Hi-Flow circulation pump for wear

Electrical Requirements (US)

Requirement	Specification
Supply Voltage	Per spa data plate (typically 240 V / 60 Hz for US 880 NT models)
Frequency	60 Hz (US standard)
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 880 NT platform’s topside communication is year-specific. If you are replacing a board in a 2013–2015 spa, your topside should be the 6600-425 (LCD with 7′ cord). For 2009 – 05/2012 spas, the topside is the 6600-854 (12-button LED trapezoid). If you are not sure, photograph both sides of your existing topside panel’s connectors before removing it.

⚠️ 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
• ⚠️ Do NOT install the 6600-390 on a 3-pump Maxxus® or Aspen® spa — use the 6600-392 instead
• ⚠️ Do NOT install the 6600-390 on an 880 LCD Series spa — the LCD platform uses the 6600-728 / 6600-730 boards and the 6600-860 trapezoid topside
• ⚠️ Do NOT pair this board with a pre-2008 NT topside or pre-2008 NT board — processor logic is incompatible

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 the PermaClear® circulation pump starts and runs continuously
• ⚠️ Test the hi-limit function and GFCI trip before allowing bathers in the spa
• ⚠️ Monitor for error codes during the first 24 hours of operation

🔍 Error Codes & Troubleshooting

Common Sundance® 880 NT 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 PermaClear® circulation flow; check thermostat
Sn1	Hi-limit sensor malfunction	Check sensor connection; reset spa; replace sensor if out of spec
Sn3	Heater deactivated	Inspect heater breaker; test heater element continuity
TH1 / TH2 / TH3	Temperature probe failure	Test sensor resistance; replace temperature sensor if out of spec
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

⚠️ Fault-code behavior may vary slightly based on specific 880 NT model year and topside firmware revision. Consult your spa’s owner’s manual for model-specific diagnostics.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ 2008+ Optima® or Cameo® 2-pump with PermaClear® replacing 6600-164 or 6600-176	✅ Direct OEM replacement	Pair with correct topside by year (6600-854 / 6600-882 / 6600-425)
♨️ 2009+ Majesta®, Altamar®, Marin®, or Capri® 2-pump with PermaClear®	✅ Direct OEM replacement	Same chip family; same topside matching
♨️ 2013 – 2015 Sundance® 880 NT 2-pump	✅ Direct OEM replacement	Pair with 6600-425 topside if replacing panel
🛁 3-pump Maxxus® or Aspen®	❌ Not compatible	Use 6600-392 instead
🛁 Sundance® 880 LCD Series (2005 – Mid 12/2009)	❌ Not compatible	Use 6600-728 (1-speed P1) or 6600-730 (2-speed P1)
🛁 Pre-2008 880 NT Systems	❌ Not compatible	Contact Parts4Tubs for legacy board identification

🤔 Frequently Asked Questions

Q: How do I know if my spa is an 880 NT System or an 880 LCD Series? A: Look at your existing board’s part number and your topside panel:

• 880 NT: Board is labeled 6600-164 or 6600-176. Topside is typically the 12-button LED trapezoid 6600-854, the 6600-882, or the 6600-425 LCD panel.
• 880 LCD: Board is labeled 6600-098, 6600-161, or 6600-180. Topside is the 11-button 6600-860 trapezoid LCD panel.

If you are not sure, contact Parts4Tubs with clear photos of your existing board label and topside panel.

Q: My existing board is a 6600-176 with IC Processor Rev. 1.01. Will the 6600-390 work? A: Yes. The 6600-390 (IC Processor Rev. 1.1A) is the current OEM replacement for the 6600-176, and before that the 6600-164. It shares the same 880 NT platform, same topside compatibility, and same mounting footprint. The newer processor revision supersedes the 1.01 revision.

Q: My spa is a 2010 Marin® 2-pump with PermaClear®. Is this the right board? A: Yes. The 6600-390 covers all 2-pump 880 NT Marin® spas starting approximately May 2009 (when Marin® transitioned to the 880 NT platform). Pair with the 6600-854 topside if your existing topside is original.

Q: Do I also need a new topside panel? A: Only if your existing topside is damaged or you are upgrading. The 6600-390 is compatible with the 880 NT topside family across the 2009–2015 production run, but the specific topside model varies by your spa’s manufacturing year — 6600-854 for 2009 – 05/2012 spas, 6600-882 for 06/2012+, and 6600-425 for 2013 – 2015. Match your existing topside part number if you are keeping it, or contact Parts4Tubs if you need to replace both.

Q: I have a 3-pump Maxxus® spa. Is this the right board? A: No. The 6600-390 is 2-pump only. 3-pump Maxxus® and Aspen® 880 NT spas use the 6600-392 board instead, which shares the same NT platform architecture but has additional pump-output hardware and different processor logic (IC Processor Rev. 3.1A).

Q: My spa is a 2007 Cameo®. Will this board work? A: Probably not. The 6600-390 is specified for 2008+ NT systems, and Cameo® transitioned to the 880 NT platform in early 2008. Pre-2008 Cameo® models used the older 880 LCD platform (6600-098 / 6600-161 / 6600-180), which requires the 6600-728 replacement. Contact Parts4Tubs with your spa’s serial number and board part number to confirm.

Q: What processor revision is installed on the 6600-390? A: The 6600-390 ships with IC Processor Revision 1.1A pre-installed.

Q: Is this board compatible with 2014-2015 880 NT spas? A: Yes. The 6600-390 is the current OEM replacement board for all 2014-2015 880 NT 2-pump spas with PermaClear®, paired with the 6600-425 topside panel.

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. Improper installation can cause fire, electrocution, or equipment damage.

Q: Is this an OEM or aftermarket board? A: The 6600-390 is the genuine OEM Sundance® / Jacuzzi® replacement board, factory-new with the latest IC Processor Rev. 1.1A pre-installed.

Q: Is the board returnable if I order the wrong one? A: No. Per manufacturer policy, spa circuit boards are final sale and cannot be returned once purchased — regardless of whether the board has been installed. Confirming your spa’s platform (NT vs LCD), model, year, pump count, and PermaClear® circulation pump presence before ordering is essential.

✅ Why Choose the 6600-390

• ✅ Genuine OEM Sundance® / Jacuzzi® replacement – factory-new with IC Processor Rev. 1.1A
• ✅ Replaces the full legacy NT chain (6600-164 → 6600-176 → 6600-390) in one current part
• ✅ Updated processor logic supersedes earlier 1.01 revision
• ✅ Direct-fit mounting – same footprint as the boards it replaces
• ✅ Full PermaClear® 24-hour circulation pump support
• ✅ Broad model-year compatibility across the Optima®, Cameo®, Majesta®, Altamar®, Marin®, and Capri® 2-pump 880 NT production run
• ✅ Backed by the Sundance® / Jacuzzi® manufacturer’s limited warranty

🇺🇸 Why Buy From Parts4Tubs

• ✅ US-based company with local support for Sundance® and Jacuzzi® spa owners
• ✅ Fast US shipping
• ✅ Expert help identifying whether your 880 Series spa is NT or LCD platform, and whether you need the 6600-390 (NT 2-pump), 6600-392 (NT 3-pump Maxxus®/Aspen®), 6600-728 (LCD 1-speed P1), or 6600-730 (LCD 2-speed P1)
• ✅ Competitive pricing on current OEM boards
• ✅ Full manufacturer warranty support
• ✅ Matching companion parts in stock — 6600-854 / 6600-882 / 6600-425 topside panels, temperature sensors, PermaClear® Hi-Flow circulation pumps, and related 880 NT service parts
• ✅ Help coordinating board + topside replacement when upgrading from older 6600-164 / 6600-176 systems

⭐ Summary

The Sundance® / Jacuzzi® 6600-390 is the current OEM replacement circuit board for 2008+ Sundance® 880 NT System 2-Pump spas with PermaClear® — covering Optima® and Cameo® from early 2008 and Majesta®, Altamar®, Marin®, and Capri® from approximately May 2009 through current production, including 2014–2015 models. Factory-fitted with IC Processor Revision 1.1A, this board directly replaces the discontinued 6600-164 and 6600-176 boards and pairs with 880 NT-family topside panels that vary by year (6600-854 for 2009 – 05/2012, 6600-882 for 06/2012+, 6600-425 for 2013 – 2015). For 3-Pump Maxxus® or Aspen® NT systems, use the 6600-392 instead. For 880 LCD Series spas (pre-2008 NT platform), use the 6600-728 or 6600-730. Not backward-compatible with pre-2008 NT system boards. Non-returnable; confirm your platform, year, pump count, and topside before ordering.

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.