⚡ Sundance® / Sweetwater® / Jacuzzi® LX-15 Spa Circuit Board – 6600-726 (With Circulation Pump)

The current OEM replacement PCB for Sundance®, Sweetwater®, Jacuzzi® J-300 LED, Jacuzzi® J-200 LED, and J-LX® / J-LXL® spa systems equipped with a 24-hour circulation pump.

🔌 Product Overview

The Sundance® 6600-726 is the current OEM replacement circuit board for Sundance® Spas, Sweetwater® Spas, and Jacuzzi® Hot Tubs built on the LX-15 control platform WITH a dedicated 24-hour circulation pump. Shipping with Micro Chip 3.61A (Revision 3.61+ family), this board directly replaces a long chain of legacy OEM part numbers — 6600-088, 6600-288, 6600-046 (with circulation-pump EPROM), and 6000-167 — and provides updated processor logic for circulation-pump spas across two decades of Sundance® production.

This PCB controls the heater, jet pumps, 24-hour circulation pump, spa lighting, and ozonator, with LX-15-specific jumper configuration for 1-pump or 2-pump operation and 15 A or 50 A pump amperage logic. It covers an exceptionally broad range of Sundance® 680 and 780 Series spas (Palermo®, Bahia®, Cayman®, Burlington®, Hartford®, Hawthorne®, Hamilton®, CHELSEE®, Certa®, Camden®), Jacuzzi® J-200 LED and J-300 LED series with circulation pumps, and J-LX® / J-LXL® 2014+ spas. Known informally as the “2-Pump 4-Relay 3.61 Circuit Board,” the 6600-726 is the modern, microprocessor-based board that Sundance® ships for every circ-pump LX-15 spa in the active replacement program.

⚠️ This board operates ONLY with a circulation pump. Spas without a dedicated 24-hour circ pump must use the companion 6600-720 instead (the chip-family counterpart with Rev. 5.60A logic for non-circ operation).

✨ Key Features

• ✅ Current OEM Sundance® replacement – factory-new with Micro Chip 3.61A pre-installed
• ✅ Exceptionally wide replacement coverage – direct drop-in for 6600-088, 6600-288, 6600-046 (with circ pump EPROM), and 6000-167
• ✅ LX-15 platform WITH circulation pump – 1-pump or 2-pump configurations
• ✅ Multi-brand, multi-series compatibility – Sundance® 680/780, Sweetwater®, Jacuzzi® J-200 LED, J-300 LED, J-LX® / J-LXL®
• ✅ 24-hour circulation pump control – programmable filter cycles (4-hour increments: C1 = 4 hours, C2 = 8 hours, etc.)
• ✅ Jumper-configurable pump count – 1-pump or 2-pump operation
• ✅ Jumper-configurable pump amperage logic – 15 A or 50 A
• ✅ °F / °C display toggle – jumper-selectable (factory default = °F for US market)
• ✅ 4 large power relays – robust pump/heater switching
• ✅ Backward-compatible with Rev. 3.56, 3.57, 3.54 chips – chip family replaces earlier revisions
• ✅ Non-returnable – spa circuit boards are final sale
• ✅ Covered by manufacturer’s limited warranty

🔧 Technical Specifications

Specification	Value
OEM Part Number	6600-726
Also Listed As	SUN6600-726, JAC6600-726, SD6600-726
Platform	Sundance® LX-15 / Sweetwater® control system
Circuit Board Type	Main PCB – with circulation pump
Current Micro Chip	3.61A (Revision 3.61+ family)
Chip Family Coverage	Supersedes Rev. 3.57, 3.56, 3.54 and earlier 3.x chips
Pump Support	1-pump or 2-pump (jumper-selectable)
Circulation Pump	✅ Required – 24-hour circ operation
Pump Amperage Logic	15 A or 50 A (jumper-selectable)
Relay Configuration	4 large power relays
Display Scale	°F / °C (jumper-selectable)
Compatible Topsides	Sundance® 6600-880 (primary); also 2600-322, 6600-633, 6600-832 (depending on spa model)
Circ Pump Programming	4-hour increments via topside panel (C1 = 4 hours, C2 = 8 hours, etc.)
Non-Returnable	✅ Yes — final sale
Warranty	Manufacturer’s limited warranty

📌 Electrical supply voltage is spa-model-specific. The 6600-726 is installed in a wide range of Sundance®, Sweetwater®, and Jacuzzi® spas that ship with varying electrical configurations — some are 120 V convertible, most North American 2-pump models are 240 V / 60 Hz, and J-300 LED spas typically require 240 V service. Always verify against your spa’s data plate before connecting power. No universal voltage/amperage rating is published for the bare 6600-726 PCB because the configuration depends on your specific spa’s heater, pumps, and service supply.

🔗 Compatibility Guide

Legacy OEM Boards Replaced by the 6600-726

Legacy OEM PN	Platform / Chip	Status
6600-088	Original LX-15 circ-pump board, Rev 3.54	Discontinued – replaced by 6600-726
6600-288	2nd-generation circ-pump board, Rev 3.56/3.57	Discontinued – replaced by 6600-726
6600-046	LX-15 circ-pump variant (with circ pump EPROM)	Discontinued – replaced by 6600-726
6000-167	J-LX® / J-LXL® / J-200 circ-pump board, Rev 3.60	Discontinued – replaced by 6600-726

📌 Chip-family quick check: If your existing board has a software chip labeled beginning with “3” (e.g., 3.26, 3.54, 3.56, 3.57, 3.60, 3.61), the 6600-726 is the correct replacement. If your chip label begins with “5” (e.g., 5.03, 5.54, 5.59, 5.60), your spa does NOT have a circulation pump — order the 6600-720 instead.

Compatible Sundance® / Sweetwater® Spa Models (With Circulation Pump)

Series / Model	Years	Notes
♨️ Sweetwater® Palermo®, Bahia®, Cayman®	2003 – 2005	With circ pump
♨️ Sundance® 780 Palermo®, Bahia®, Cayman®	2005 – 2006	780 Series, with circ pump
♨️ Sundance® 780 Hamilton®, CHELSEE®, Certa®, Camden®	2007+	1-pump with circ
♨️ Sundance® 680 Hartford®, Hawthorne®	2007+	With circ pump configuration
♨️ Sundance® 680 Burlington® (1-pump)	2008+	With circ pump
♨️ Sundance® 680 Burlington® (1-pump, intermediate)	01/2012 – 03/2012	Replaced a 6000-167 board

Compatible Jacuzzi® J-200 LED Models (With Circulation Pump)

Model	Years	Notes
♨️ J-230	2008 – 2011	With circulation pump
♨️ J-270, J-280	2007 – 2012	With circulation pump
♨️ J-280, J-270, J-230	2012	All with circ pump (final year on this platform)

Compatible Jacuzzi® J-300 LED Models (With Circulation Pump)

Model	Years	Notes
♨️ J-335, J-345	2002 – 2006	With circ pump
♨️ J-325	2002 – 2003, 2005 – 2006	With circ pump
♨️ J-325 (240 V model)	2007	With circ pump
♨️ J-365, J-355, J-345, J-335	2007 – 2013	2-pump with circ pump
♨️ J-375	2008 – 2011	2-pump with circ pump
♨️ J-375, J-365, J-355, J-345, J-335	2012 – 2013	2-pump with circ pump
♨️ J-320, J-330, J-340	Older J-300	Also compatible (per OEM listing)

Compatible Jacuzzi® J-LX® / J-LXL® Series

Model	Years	Notes
♨️ All J-LX® and J-LXL® Models	2014+	North American 60Hz AND Export 50Hz per OEM documentation

Not Compatible — Use a Different Board

Spa Configuration	Correct Replacement
❌ Spa WITHOUT a circulation pump (chip label begins with “5”)	6600-720 (no-circ variant)
❌ 2014-2015 J-300 LED (CLEARRAY® on-demand models)	6600-296 (1-pump) / 6600-297 (2-pump)
❌ 2016+ J-300 Series	6600-784 (2-pump) / 6600-786 (1-pump)
❌ 2018+ J-100 / J-200 models	6600-268 (microprocessor-based J-100/J-200 current board)
❌ Sundance® 880 LCD Series with PermaClear® circ pump	6600-728 (1-speed P1) or 6600-730 (2-speed P1)
❌ Sundance® 880 NT Systems	6600-390 (2-pump) or 6600-392 (3-pump Maxxus/Aspen)

Compatible Topside Control Panels

Part Number	Description
Sundance® 6600-880	Primary topside pairing for 6600-726 — 780 Series 2-Pump 6-button oval panel (2007+ Hamilton, CHELSEE, Certa, Camden)
2600-322	J-300 Oval Keypad (alternate)
6600-633	680 Series 2006-2007 2-Pump topside (Burlington) / 780 Series 2005-2006 (Palermo, Bahia)
6600-832	Sweetwater LX-15 2-Pump (Palermo, Bahia 2000-2002)

⚠️ Verify your topside panel part number before ordering. The 6600-726 board is compatible with multiple topside models depending on your spa’s year and model. Match your existing topside if you are keeping it; contact Parts4Tubs if you need to replace both.

🎛️ Board Functions & Controls

Jumper Settings

Jumper	Function	ON	OFF
Jumper 1	Pump amperage logic	15 A	50 A
Jumper 2	Pump count	2 pumps	1 pump
Jumper 3	Used in conjunction with Jumper 2	—	—
Jumper 4	Temperature display scale	Celsius (°C)	Fahrenheit (°F) — US default

📌 Jumper 1 usage: Set based on your spa’s specific pump amperage. This selects the internal pump-relay current-handling logic — not the spa’s main service amperage.

📌 Jumpers 2 and 3: Configure the board to match the physical pump count in your spa. Incorrect jumper setting will cause pump outputs to be misread by the topside panel.

Controlled Outputs

Output	Function
Pump 1	Primary jet pump (per spa configuration)
Pump 2	Secondary jet pump (when Jumper 2 is ON)
Circulation Pump	✅ 24-hour circulation pump (programmable in 4-hour increments)
Heater	Spa-specific flow-through heater (per spa’s factory configuration)
Light	LED or incandescent (per spa configuration)
Ozonator	Supported (per spa’s factory configuration)

Circulation Pump Programming

The 6600-726 supports programmable circulation-pump runtime via the topside panel:

Setting	Approximate Runtime
C1	4 hours per day
C2	8 hours per day
C3, C4	Additional 4-hour increments (consult manual for exact values)

How to program circ pump runtime: Press and hold Jet 1 and the minus (−) key for 3 seconds. The display will show C1, C2, C3, or C4. Use the plus (+) or minus (−) key to select your desired runtime.

Factory Defaults (Chip Rev. 3.61A)

Feature	Setting
Circulation Pump	Programmable (4-hour increments)
Temperature Units	°F (Jumper 4 OFF)

🛠️ Installation Requirements

⚠️ IMPORTANT: Spa 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 chip revision begins with “3” (3.54, 3.56, 3.57, 3.60, or 3.61) — if it begins with “5”, you need the 6600-720 instead
• [ ] Confirm your spa has a 24-hour circulation pump (a small dedicated circ pump, NOT the main 2-speed jet pump)
• [ ] Note your existing board’s part number (6600-088, 6600-288, 6600-046, or 6000-167)
• [ ] Note your existing topside panel part number (6600-880, 2600-322, 6600-633, 6600-832, or other)
• [ ] 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 and connector position before removing the old board
• [ ] Inspect the temperature / hi-limit sensors and circulation pump for wear — replace at the same time if needed

Electrical Requirements (US)

Requirement	Specification
Supply Voltage	Per spa data plate (120 V or 240 V — varies by model and configuration)
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: Before removing the old board, label every wire and harness with its position. The 6600-726 shares the same general footprint as the boards it replaces, but specific connector positions may differ slightly between revisions. Photograph both sides of the old board for reference.

⚠️ 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 local codes require it
• ⚠️ Verify GFCI protection is installed and tested
• ⚠️ Equipment grounding and bonding must comply with NEC
• ⚠️ Never operate the spa with the electrical compartment cover removed
• ⚠️ Do NOT use this board on a spa without a 24-hour circulation pump — order 6600-720 instead
• ⚠️ Verify jumper settings match your spa’s pump count and amperage before powering on

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 Jumper 4 is OFF for °F display (US standard)
• ⚠️ Verify Jumper 1 matches your spa’s pump amperage requirement
• ⚠️ Confirm the circulation pump starts and operates on its programmed schedule
• ⚠️ Test the hi-limit function and GFCI trip before allowing bathers in the spa
• ⚠️ Monitor the topside panel for any fault codes during the first 24 hours of operation

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🔍 Error Codes & Troubleshooting

Common Indicator Codes (Sundance® LX-15 Circ-Pump Platform)

Code	Meaning	Basic Troubleshooting
FLO	Pressure / flow switch fault	Clean filter; check plumbing blockages; inspect flow switch
OH / OHS	Overheating detected	Allow water to cool; verify circulation pump flow; check thermostat
Sn1	Hi-limit sensor malfunction	Check sensor connection; reset spa; replace sensor if faulty
Sn3	Heater deactivated	Inspect heater breaker; test heater element continuity
ICE	Freeze-risk condition	Verify heater function; raise setpoint; insulate equipment
Cool	Water temperature more than 20°F below setpoint	Verify heater operation; confirm heater breaker

⚠️ Fault code behavior may vary slightly depending on the specific Sundance® / Sweetwater® / Jacuzzi® spa model and its topside panel firmware. Consult your spa’s owner’s manual for model-specific diagnostics.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Sundance® 680 / 780 Series circ-pump spa replacing a 6600-088, 6600-288, or 6600-046	✅ Direct OEM replacement	Same mounting footprint; Chip 3.61A
♨️ Sweetwater® Palermo® / Bahia® / Cayman® (2003–2006) with circ pump	✅ Direct OEM replacement	Common circ-pump Sweetwater platform
♨️ Jacuzzi® J-200 LED with circ pump (J-230, J-270, J-280)	✅ Direct OEM replacement	2007-2012 circ-pump configurations
♨️ Jacuzzi® J-300 LED with circ pump (2002 – 2013 J-325 through J-385)	✅ Direct OEM replacement	Multiple J-300 generations covered
♨️ Jacuzzi® J-LX® / J-LXL® (2014+)	✅ Direct OEM replacement	Replaced 6000-167 in the summer of 2013
🛁 Spa without 24-hour circulation pump	❌ Not compatible	Use 6600-720 instead
🛁 2014+ J-300 LED with CLEARRAY® on-demand	❌ Not compatible	Use 6600-296 / 6600-297 instead
🛁 2018+ J-100 / J-200 spa	❌ Not compatible	Use 6600-268

🤔 Frequently Asked Questions

Q: How do I tell if I need the 6600-726 (with circ) or the 6600-720 (no circ)? A: Look at the software chip label on your existing board. If it begins with a “3” (e.g., 3.54, 3.56, 3.57, 3.60, 3.61), you have a circulation-pump system and the 6600-726 is correct. If it begins with a “5” (e.g., 5.03, 5.54, 5.59, 5.60), you have a non-circulation-pump system and need the 6600-720 instead. You can also check whether your spa has a separate small circulation pump running 24 hours — this is different from your main 2-speed jet pump.

Q: My existing board is a 6600-288 with Chip Rev 3.57. Will the 6600-726 replace it? A: Yes. The 6600-726 (Chip 3.61A) is the current OEM replacement for the 6600-288 (Chip 3.57). It ships with the updated Micro Chip and is backwards compatible with your existing 3.57 configuration.

Q: My spa is a 2012 Jacuzzi® J-375 with a circulation pump. Is this the right board? A: Yes. The 6600-726 covers all 2012-2013 2-Pump J-375, J-365, J-355, J-345, and J-335 models with circulation pumps. It replaced the earlier 6000-167 board for these models in the summer of 2013.

Q: My J-LX or J-LXL spa has a 6000-167 board. Will the 6600-726 work? A: Yes. The 6600-726 is the current OEM replacement for the 6000-167 on all 2014+ J-LX® and J-LXL® models (both North American 60Hz and Export 50Hz configurations). The two boards are the same physical board with different microchips — the 6600-726 ships with the current Micro Chip 3.61A.

Q: What if my board is labeled 6600-088? A: The 6600-088 was the original LX-15 circ-pump board with Chip Rev 3.54. It has been discontinued and the 6600-726 is the current OEM replacement. The 6600-726 fits the same mounting footprint and is backwards compatible.

Q: Can I keep my existing topside panel? A: In most cases, yes. The 6600-726 is compatible with the Sundance® 6600-880 primary topside, and also with 2600-322, 6600-633, and 6600-832 depending on your spa’s model. If your existing topside is one of these, it should continue to work. Contact Parts4Tubs with your topside part number if you are unsure.

Q: How do I program the circulation pump runtime? A: Press and hold the Jet 1 button and the minus (−) button together for 3 seconds. The display will show C1, C2, C3, or C4. Use the plus/minus keys to select your desired runtime. C1 is approximately 4 hours per day, C2 is approximately 8 hours per day, and so on in 4-hour increments.

Q: Is the 6600-726 the same board as the “6600-288” I keep seeing referenced? A: Yes — functionally the 6600-726 is the current OEM successor to the 6600-288. Sundance® transitioned to the new part number along with the updated Chip 3.61A. Older documentation may refer to “6600-288” or “JAC6600-726” — all point to the same current board.

Q: Does this board work with Jacuzzi® J-320, J-330, or J-340? A: Yes. The 6600-726 is listed as the replacement board for the older J-320 / J-330 / J-340 Jacuzzi® models with circulation pumps.

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 6600-726 is the genuine OEM Sundance® / Jacuzzi® replacement board, shipped directly from the manufacturer with the latest Micro Chip 3.61A installed.

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

✅ Why Choose the 6600-726

• ✅ Genuine OEM Sundance® / Jacuzzi® replacement – factory-new with Micro Chip 3.61A
• ✅ Covers an exceptionally wide chain of legacy part numbers in one current part (6600-088, 6600-288, 6600-046, 6000-167)
• ✅ 4 large power relays for robust pump and heater switching
• ✅ Direct-fit mounting footprint – same as the boards it replaces
• ✅ Jumper-configurable for 1-pump or 2-pump, 15 A or 50 A pump logic
• ✅ Programmable circulation pump runtime in 4-hour increments
• ✅ Backed by Sundance®’s manufacturer’s limited warranty
• ✅ Spans two decades of Sundance®, Sweetwater®, and Jacuzzi® production

🇺🇸 Why Buy From Parts4Tubs

• ✅ US-based company with local support for Sundance®, Sweetwater®, Jacuzzi®, J-LX®, and J-LXL® spa owners
• ✅ Fast US shipping
• ✅ Expert help identifying whether you need the 6600-726 (with circ) or 6600-720 (no circ)
• ✅ Competitive pricing on current OEM boards
• ✅ Full manufacturer warranty support
• ✅ Matching topside panels in stock — Sundance® 6600-880, 2600-322, 6600-633, 6600-832, and related LX-15 service parts
• ✅ Help matching legacy OEM part numbers (6600-088, 6600-288, 6600-046, 6000-167) to the correct current 6600-726 replacement

⭐ Summary

The Sundance® 6600-726 is the current OEM replacement circuit board for Sundance® Spas, Sweetwater® Spas, and Jacuzzi® Hot Tubs built on the LX-15 control platform WITH a 24-hour circulation pump. Shipping with Micro Chip 3.61A (Rev. 3.61+ family), it directly replaces the legacy OEM boards 6600-088, 6600-288, 6600-046 (with circ pump EPROM), and 6000-167. Covers a broad range of Sundance® 680/780 Series models (Palermo®, Bahia®, Cayman®, Burlington®, Hartford®, Hawthorne®, Hamilton®, CHELSEE®, Certa®, Camden®), Jacuzzi® J-200 LED circ-pump models (J-230, J-270, J-280), Jacuzzi® J-300 LED spas with circ pumps from 2002-2013 (J-325 through J-385, plus older J-320/J-330/J-340), and all 2014+ J-LX® / J-LXL® models. Features 4 large power relays, jumper-configurable 1-pump or 2-pump operation, 15 A or 50 A pump amperage logic, and programmable circulation-pump runtime in 4-hour increments. For spas WITHOUT a 24-hour circulation pump (chip label starts with “5”), use the 6600-720 instead. Non-returnable; 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.