2 User Manual

3
Troubleshooting
22
Service Manual
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Always
disconnect power to the pool heater before
servicing. Failure to comply could result in
severe personal injury, death, or substantial
property damage.
Never jumper (bypass) any device except for
momentary testing as outlined in the
Troubleshooting chart. Severe personal
injury, death, or substantial property damage
can result.
Before troubleshooting:
1. Have the following items:
a. Voltmeter that can check 120 VAC, 240 VAC, 24 VAC,
and 12 VDC.
b. Continuity checker.
c. Contact thermometer.
2. Check for 240 VAC (120 VAC optional) to pool heater.
3. Make sure all external limit controls are installed and
operating.

WARNING

WARNING
Table 3A Troubleshooting Chart - No Display
FFAAUULLTT CCAAUUSSEE CCOORRRREECCTTIIVVEE AACCTTIIOONN
No Display
- No 120/240 VAC supplied to the pool heater. • Check external line switch, fuse, or breaker.
• Check position of ON/OFF switch. Turn switch to the
ON position.
• Check 120 or 240 VAC through the ON/OFF switch.
- No voltage through the switch. • Replace switch.
- Bad main control board. • Replace the main control board.
No Burner
Operation
- Main control board temperature set point
satisfied.
• Review temperature setting.
- Remote thermostat satisfied. • Review remote thermostat setting.
- Pool heater locked out on fault. • Consult display for specific fault. Refer to fault
descriptions on pages 25 - 27 of this manual for
corrective actions.
Check the following:
1. Wire connectors to control module are securely plugged in
at the module and originating control.
2. Gas pressures:
• Maximum: 14 inches w.c. (natural), 14 inches w.c.
(LP) with no flow (lockup) or with pool heater on.
• Minimum: 4.0 inches w.c. (natural) on the ER152 - ER202
models, 4.5 inches w.c. (natural) on the ER252 - ER302
models, and 5.0 inches w.c. (natural) on the ER402 model.
On the ER152 - ER402 models minimum 8.0 inches w.c.
(LP) with gas flowing (verify during pool heater startup).