—It is possible that the high limit (E.C.O.) has functioned to shut off the appliance. See FEATURES — Water Temperature Control for reset procedure. Contact your serviceman if limit continues to function to shut off appliance.
Use this diagnostic system in conjunction with the “OPERATIONAL CHECKLIST” and the “SEQUENCE OF OPERATION” to troubleshoot the appliance.
SYSTEM DIAGNOSTICS | SERVICE |
Your water heater is equipped with an ignition module that incorporates a diagnostic system to assist in troubleshooting the appliance. The indicator codes on the ignition module are as follows:
1 flash | System lockout (retries or cycles exceeded) | |
2 flashes | Pressure switch stuck close | |
3 flashes | Pressure switch stuck open |
|
4 flashes | Open on high temperature limit switch (eco) | |
6 flashes | 115 volt AC power reversed (check polarity) | |
7 flashes | Low flame sense signal (make sure flame | |
| sensor is in burner flame) | |
8 flashes | Check ignitor | |
Table 10. |
|
|
continuous flash
continuous on
The installer may be able to observe and correct certain problems which may arise when the unit is put into operation. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater.
As preliminary step, check wiring against diagram, check for grounded, broken or loose wires. Check all wire ends to be sure that they are making good contact.
ELECTRICAL SERVICING
CAUTION
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER SERVICING.
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