🔌 Master Spas® MS1500 Replacement Circuit Board — X801096 — Balboa® 54494 — VS501SZ — 8-Pin Phone Cable

Genuine OEM replacement circuit board for Master Spas® MS1500 systems — compatible with Down East Spas®, H2X Swim Spas, Legacy Whirlpool®, Legend Series, and Riviera Spas® — 8-pin phone cable connector, VS501SZ platform.

⚠️ IMPORTANT — PLEASE READ BEFORE ORDERING

• Chip number verification required. The chip designation for this board is MS1500 (full revision: MS1500R1(x)). Locate the chip sticker near the center of your existing board and confirm before ordering. Do not order based on appearance — many boards look identical but carry different chip software.
• Board markings note. This board may be physically marked “V5500Z” and “P/N 22972_E2 COPYRIGHT 2014” on the PCB itself. This is the underlying PCB designation and is not the same as the part number. The correct identifiers are X801096 (Master Spa PN) and 54494 (Balboa PN).
• Control box compatibility note. This board will not fit the NLA (no longer available) X300070 Balboa Equipment MS510 System Control Pack, which has been discontinued. Confirm your existing control box is 54493 before ordering.
• DIP switch and voltage configuration required. This board is not plug-and-play. Correct voltage setup, component wire positioning, and DIP switch settings must be applied. Refer to the wiring schematic on the back of the spa pack cover.
• Non-returnable. All electronics sales are final. Confirm chip number, control box number, and model compatibility before ordering.

📋 Product Overview

The Master Spas® X801096 is the genuine OEM replacement circuit board for MS1500 control systems, manufactured by Balboa Water Group under part number 54494 (also 54494-01). It uses the VS501SZ platform and an 8-pin phone cable topside connector. The board is used across several Master Spas® brand families including Down East Spas®, H2X Swim Spas, Legacy Whirlpool®, Legend Series, and Riviera Spas®, spanning model years 2005 through 2009 depending on the brand.

The control box associated with this board is Balboa number 54493. The physical PCB may carry the marking “V5500Z” with P/N 22972_E2 — this is the PCB plate designation and does not indicate a different product.

💫 Key Features

✅ Genuine OEM replacement circuit board — Balboa-manufactured for Master Spas®
✅ Master Spa Part Number: X801096
✅ Balboa Part Numbers: 54494 / 54494-01 | Control box: 54493
✅ Chip: MS1500 / MS1500R1(x)
✅ Platform: VS501SZ — Balboa Value Series
✅ Connector: 8-pin phone cable (included)
✅ Compatible with Down East Spas®, H2X Swim Spas, Legacy Whirlpool®, Legend Series, and Riviera Spas®
✅ Board dimensions: 11″ L × 5″ H (27.94 cm × 12.7 cm) | Weight: 2.125 lbs. (980 g)
✅ Factory-new — never installed
✅ Manufacturer’s warranty included

🔧 Technical Specifications

Specification	Value
Master Spa Part Number	X801096
Balboa Part Numbers	54494 / 54494-01
Control Box Number	54493
Chip Designation	MS1500 / MS1500R1(x)
Platform	VS501SZ — Balboa Value Series
Connector	8-pin phone cable (included)
Board Dimensions	11.0″ L × 5.0″ H (27.94 cm × 12.7 cm)
Weight	2.125 lbs. (980 g)
PCB Markings (note)	May show V5500Z, P/N 22972_E2 COPYRIGHT 2014 — PCB plate designation only
Board Type	New — genuine OEM
Returns	Non-returnable (all electronics final sale)
Warranty	Manufacturer’s warranty

⚠️ For voltage, amperage, heater output, pump configuration, and breaker specifications, refer to the wiring diagram and rating label on the back of your spa pack cover or the 54493 control box documentation.

🔗 Compatibility Guide

Compatible Spa Brands and Models:

Down East Spas® — 2005–2008:

Model
Westbrook 3
Providence 2
Cape Cod 2
Windsor 2
Exeter 2
Portsmouth 2
East Hampton 2
Exeter 3
Manchester
Cape Cod 3
Cape Cod SE
Exeter SE
Westbrook SE
Windsor 3
Windsor SE
Portsmouth 3
Portsmouth SE
East Hampton SE
Windsor 3 STS
Windsor SE STS
H2X Swim Spa

H2X Swim Spas® — 2008:

Model
H2X Cross Trainer
H2X Swim Spa

Legacy Whirlpool® — 2007–2008:

Model
Intrepid
Inspire
Enterprise

Legend Series Spas — 2007–2008:

Model
LSI 557
LSX 557

Riviera Spas® — 2007–2009:

Model
Cannes
Monaco

⚠️ Always verify the chip number (MS1500 / MS1500R1(x)) on your existing board regardless of spa brand or year. Chip number is the definitive identifier.

⚠️ Control box check: Confirm your existing control box is Balboa 54493. This board will not fit the discontinued X300070 / Balboa MS510 System Control Pack.

How to Confirm Compatibility:

1. Locate the chip sticker near the center of the existing board — confirm it reads MS1500 or MS1500R1(x)
2. Confirm control box number is 54493
3. Confirm 8-pin phone cable topside connection

Replaces These Part Numbers:

Part / Chip Number	Notes
X801096	Master Spa PN — this board
54494	Balboa board PN
54494-01	Balboa board PN (revision)
54493	Also referenced (AKA — control box PN)
MS1500R1(x)	Full chip revision designation
MS1500 / MS510	Chip designation variants

🛠️ Installation Requirements

Pre-Installation Checklist:

• [ ] Confirm chip reads MS1500 or MS1500R1(x) on existing board
• [ ] Confirm control box number is 54493 (this board does not fit X300070/MS510 box)
• [ ] Confirm 8-pin phone cable topside connection
• [ ] Obtain the wiring schematic from the back of the spa pack cover before starting
• [ ] Photograph all wiring connections and DIP switch positions before removal
• [ ] Disconnect all power at GFCI breaker or service disconnect
• [ ] Allow capacitors to discharge before handling the board

Electrical Requirements:

Requirement	Specification
GFCI	Class A GFCI required — NEC Article 680
Ground & Bonding	Required — NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Within line of sight of spa, at least 5 ft away
Voltage	Refer to spa pack wiring diagram and rating label
Wire Type	Copper conductors only

⚠️ Safety Warnings

• ⚠️ ALWAYS disconnect all power before circuit board work
• ⚠️ Licensed electrician installation required; NEC Article 680 compliance mandatory
• ⚠️ GFCI required; grounding and bonding required per NEC Article 680
• ⚠️ Do not order based on appearance — confirm chip reads MS1500 or MS1500R1(x)
• ⚠️ Will NOT fit discontinued X300070 / MS510 System Control Pack — confirm box is 54493
• ⚠️ PCB may show V5500Z marking — this is normal and does not indicate a wrong board
• ⚠️ DIP switch and voltage configuration required — refer to wiring schematic on spa pack cover
• ⚠️ Damage from incorrect installation is NOT covered under warranty

❓ Frequently Asked Questions

Q: My board says “V5500Z” on it — is that the same as this board? A: Yes. This board (X801096 / 54494) may physically display the marking “V5500Z” and “P/N 22972_E2 COPYRIGHT 2014” on the PCB. This is the underlying PCB plate designation — it is normal and does not indicate a different product. The correct identifying numbers are X801096 (Master Spa PN), 54494 (Balboa PN), and MS1500 (chip). Confirm by locating the chip sticker near the center of the board.

Q: What is the difference between chip numbers MS1500 and MS510? A: Both refer to the same board family for this product (X801096). Superior Pool and Spa lists the chip as “MS1500 / MS510.” For ordering purposes, if your board shows MS1500R1(x) or MS510, the X801096 is your replacement. Confirm by checking the Balboa number 54494 or 54494-01 that may also appear on your existing board.

Q: Will this board fit my X300070 spa pack? A: No. The X300070 (Balboa MS510 System Control Pack) has been discontinued and this board (X801096) is not compatible with that control box. The correct control box for this board is Balboa 54493.

Q: Which Down East Spas models does this board cover? A: This board covers Down East Spas from 2005 through 2008 including Westbrook 3, Providence 2, Cape Cod 2, Windsor 2, Exeter 2, Portsmouth 2, East Hampton 2, Exeter 3, Manchester, Cape Cod 3, Cape Cod SE, Exeter SE, Westbrook SE, Windsor 3, Windsor SE, Portsmouth 3, Portsmouth SE, East Hampton SE, Windsor 3 STS, Windsor SE STS, and H2X Swim Spa. Always verify by chip number regardless of model.

✅ Why Choose the Master Spas® X801096 (Balboa® 54494)

✅ Genuine OEM circuit board — Balboa-manufactured for Master Spas
✅ VS501SZ platform — well-documented Balboa Value Series architecture
✅ 8-pin phone cable included
✅ Broad multi-brand compatibility — Down East, H2X, Legacy Whirlpool, Legend Series, Riviera
✅ Factory-new — never installed
✅ Manufacturer’s warranty included

🤝 Why Buy from Parts4Tubs

✅ Fast US shipping
✅ Chip number, control box, and compatibility verification — contact us before ordering if unsure
✅ Competitive pricing

⚡ Summary

The Master Spas® X801096 (Balboa® 54494/54494-01, chip MS1500R1(x), control box 54493) is the OEM replacement circuit board for MS1500 VS501SZ systems used across Down East Spas® (2005–2008), H2X Swim Spas (2008), Legacy Whirlpool® (2007–2008), Legend Series (2007–2008), and Riviera Spas® (2007–2009). The 8-pin phone cable is included. The board measures 11″ L × 5″ H and weighs 2.125 lbs. Note: the physical PCB may display the marking V5500Z (P/N 22972_E2) — this is normal. This board does not fit the discontinued X300070 / MS510 control pack; confirm control box is 54493 before ordering. Non-returnable; manufacturer’s warranty included.

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.