Part Number: 6600-848
Brand: Sundance Spas
Sundance® 780™ Series 2‑Pump Main Circuit Board – 04/2017 to 05/23/2018)
⚠️ IMPORTANT DISCLAIMER – PLEASE READ BEFORE PURCHASING
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There are no refunds or returns on electronic spa parts, including control panels and keypads.
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Please verify compatibility with your hot tub model before ordering.
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All electronic components are covered under the original manufacturer’s warranty.
Overview
Part 6600‑848 is the OEM main 2‑pump system control board used in Sundance® 780 Series spas manufactured between April 2017 and May 23, 2018. This PCB manages all major spa functions including pump control, heater logic, lighting, filtration cycles, and ClearRay® UV readiness.
The 6600‑848 board is the direct predecessor to the later 6600‑404 board (05/24/2018–10/2023). It is engineered specifically for the Sundance® 780 ENC control platform used during this production window.
Compatible Spa Models & Years
✔ Sundance® 780™ Series (2‑Pump Models)
Production Window: 04/2017 – 05/23/2018
| Model |
Notes |
| Hamilton |
2‑Pump |
| Chelsee |
2‑Pump |
| Hanover |
2‑Pump |
| Bristol |
2‑Pump |
| Montclair |
2‑Pump |
✖ NOT compatible with
- Pre‑2017 780 Series boards
- Post‑05/2018 boards (these use 6600‑404 instead)
- 1‑pump 780 Series spas (use 6600‑846 instead)
- 880 / 980 / 680 boards
Technical Details
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System Type: Sundance® 780 ENC
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Pump Configuration:
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Pump 1: 2‑speed
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Pump 2: 1‑speed
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Supported Features:
- 5.5 kW heater logic
- Circulation pump control
- LED lighting control
- ClearRay® UV indicator logic
- Filtration & timer control
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Voltage: 240V
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Topside Compatibility: 780 Series touchscreen / LCD panel (2017–2018 hardware)
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Firmware: 780 2‑Pump ENC logic (2017 revision)
Purpose & Performance
The 6600‑848 control board manages all major functions in the 780 2‑pump system, including:
- High‑output dual‑pump hydrotherapy
- Smart Logic‑based filtration
- Heater safety sequencing
- UV/ClearRay® system readiness
- Water temperature regulation
- Lighting and accessory control
Replacing this board resolves common issues including:
- FLO / OH / ILOC logic faults
- Heater not activating
- Topside unresponsive
- Pump start-up failure
- Incorrect filtration timing
Related / Successor Parts
| Part Number |
Description |
| 6600‑404 |
Successor board (05/24/2018–10/2023) |
| 6600‑846 |
780 1‑Pump board for the same generation |
| ClearRay® module |
UV system this board interfaces with |
| Temp/Hi‑Limit sensors |
6600‑167 / 6600‑110 (compatible sensor family) |
Ordering Notes
- Only for 2‑pump 780 Series spas-built April 2017 – May 23, 2018
- Will NOT retrofit into pre‑2017 or post‑2018 spas
- Ensure your spa serial number falls within the matching date code
- All electronics follow Sundance/Jacuzzi non‑returnable policy, Manufacturer's warranty will apply
