Heater Will Not Fire - B
Start
Is red “SERVICE HEATER” LED “on”
YES
NO
Is red “SERVICE SYSTEM” LED on?
YES
Verify that pump is on, filter is not blocked, and the water flow is above the minimum requirement.
YES
NO
NO
Increase POOL/SPA tempera- ture setting on Membrane Pad above actual water tem- perature. Heater should fire on demand for heat. If not, and no other red LED’s light, replace Control Board.
Service pump/filter and elimi-
CONTINUE |
With pump running, adjust Water Pressure Switch to lower pressure until ‘SER- VICE SYSTEM” LED goes out. Then verify that “SER- VICE SYSTEM” LED goes on with pump off.
NO
Check that water pressure is within the adjustment range of the Pressure Switch
YES
Verify that switch wiring is OK and sensing tube is not blocked, and replace water Pressure Switch.
YES
NO
nate other flow obstructions.
Heater should fire on call for heat.
Minimum Flow Requirements
ModelFlow
20020 GPM
33330 GPM
40040 GPM
If water pressure is outside of adjustment range that will open switch with pump off and close switch with pump on, replace with flow switch set above minimum flow requirement.
Minimum Flow Requirements
ModelFlow
20020 GPM
33330 GPM
40040 GPM
Check whether any of the red diagnostic LED’s on back of board (AGS, AFS, SFS, HLS or PS) are “on”
NO
GO TO
“HEATER WILL NOT FIRE - C”
Page 26
YES
Go to “Diagnostic LED’s”, (Pages 28 and 29)
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