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240V: check Pin1 to Pin 3. 120V: check Pin 2 to Pin 3. Jumper Fireman’s Switch at Terminal Board and depress “POOL” or “SPA” ON button on membrane pad. Does “SPA” or “POOL” LED come “on”? Leaving jumper in place, check for 24 VAC between Fireman’s Switch terminals and ground. Jumper pins 9 and 8 on J6 of Control Board. Does “SPA” LED come on? Jumper pins 9 and 7 on J6 of Control Board. Does “POOL” LED come on? Check for Line Voltage between L1 and L2 terminals on Terminal Board. NO YES NO NO YES YES YES YES YES NO NO YES NO Check that correct 12-pin plug is installed (red is 240V, black is 120V) If plug is not installed: Install correct plug. 240V plug in 120V circuit: Replace with correct plug. 120V plug in 240V circuit: Replace trans- former, control board, and ignition control module (see “HEATER WILL NOT FIRE-C and -D”, Pages 26 and 27). Check fuse and all other 24V components for damage. Remove jumper. Check ribbon cable connection between Membrane Pad and J6 on Control Board. Depress “POOL” or “SPA” On pad again. Does “POOL” or “SPA” LED come on? NO Page 25 24 Heater Will Not Fire - B Start Is red “SERVICE HEATER” LED “on” YES NO YES NO NO Is red “SERVICE SYSTEM” LED on? Verify that pump is on, filter is not blocked, and the water flow is above the minimum requirement. Check that water pressure is within the adjustment range of the Pressure Switch (0-5 psig) Verify that switch wiring is OK and sensing tube is not blocked, and replace water Pressure Switch. 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. YES YES YES NO NO CONTINUE Increase POOL/SPA temperature setting on Membrane Pad above actual water temperature. Heater should fire on demand for heat. If not, and no other red LED’s light, replace Control Board. Service pump/filter and eliminate other flow obstructions. Heater should fire on call for heat. Re-verify that water flow is above minimum requirement. Minimum Flow Requirements Model Flow 200 20 GPM (76 LPM) 333 30 GPM (114 LPM) 400 40 GPM (151 LPM) 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 Model Flow 200 20 GPM (76 LPM) 333 30 GPM (114 LPM) 400 40 GPM (151 LPM) Check whether any of the red diagnostic LED’s on back YES of board (AGS, AFS, SFS, HLS or PS) are “on” NO Go to “Diagnostic LED’s”, (Pages 28 and 29) GO TO “HEATER WILL NOT FIRE - C” Page 26 25 Heater Will Not Fire - C Start Go to “INITIAL TROUBLESHOOTING” Continue to observe heater for several minutes. Cycle heater on and off several times. Observe for delayed or rough ignition, poor combus- tion, premature extinction of flame, evidence of boiling, or operation of any diagnostic LED. Go to pertinent trou- bleshooting section if any Turn off power to heater for 5 seconds, and turn back on. Make sure tempera- ture setting is above water temperature. Wait one minute. Does heater fire and stay on? NO YES YESNO Is “SERVICE HEATER” LED “on”? If any red diagnostic LED’s (AGS, AFS, SFS, HLS, PS, or THERMISTOR) come “on”, go to to Pages 28 and 29. malfunction is observed. CONTINUE Replace Gas Valve with identical part. Fix wiring between TH and GND terminals of Ignition Control Module and Control Board. Replace Control Board. Fix wiring between GAS ter- minals on Control Board and Gas Valve. Verify that gas supply is open all the way to Gas Valve, and Gas Valve knob is at “on” position. Check for 24 VAC to Gas Valve terminals during ignition try. (Voltage appears about 24 seconds after call for heat). SEE NOTE 2. Did Blower come on? Verify that gas is flow- ing to burner during ignition try. Observe gas meter for move- ment during ignition try (wait for about 30 seconds after calling for heat). Check for 24 VAC between TH and GND terminals on Ignition Control Module. SEE NOTE 1. Check for 24 VAC between TH and GND terminals on Control Board. SEE NOTE 1. Check for 24 VAC between GAS termi- nals on Control Board. SEE NOTE 2. YES NO NO YES NO NO NO YES YES YES YES Go to “BURNER TROUBLESHOOTING” (Page 30) Go to “HEATER WILL NOT FIRE-D” (Page 27) Check for 24 VAC between VAL and GND terminals on Ignition Control Module. SEE NOTE 2. Check for 24 VAC between VAL and GND terminals on Control Board. SEE NOTE 2. Did burner fire at all? Replace Ignition Control Module. NO YES Fix wiring between VAL and GND terminals of Ignition Control Module and Control Board. NO YES NO NO Replace Control Board. YES Replace Control Board. NOTE 1: Voltage appears immediately after call for heat, and may be on for only about 30 seconds. NOTE 2: Voltage appears about 24 seconds after call for heat, and may be on for only about 7 seconds. 26 Heater Will Not Fire - D IMPORTANT! READ ME FIRST!! IMPORTANT! READ ME FIRST!! meter will read either 0 VAC or 240 VAC. If your ICM is If your heater is corre...

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