Instructions / Assembly

52
WHL-001 REV. 9.3.14
Table 18 – Lockout Fault Codes – NOTE: If you replace a part to remedy a fault, it is recommended that you cycle the unit at least three
or four times to assure the fault has been resolved.
F14
Tank Sensor Data Not Consistent
The data received from the tank
sensors exceeds the difference
allowed by the control.
1. Manually reset the water heater.
2. Observe water heater operation. If fault code occurs
again
3. Check the Dual Temperature Sensor. Ensure it is
properly wired to the control, and that there are no
breaks, cuts, or other visible issues with the sensor wire.
4. Use an ohmmeter to check resistance on first Sensor A,
then Sensor B of the Dual Temperature Sensor.
5. Replace Dual Temperature Sensor if either Sensor A or
Sensor B fails the resistance test
F21
ADC Failure
The ADC test has detected a major
fault in the electronic components.
1. Manually reset the water heater.
2. Observe water heater operation.
3. If fault code occurs again, replace the controller.
F31
Dual Temperature Sensor B Error
Dual Temperature Sensor B is out of
normal operating range, meaning the
sensor is either open or shorted.
1. Manually reset the water heater.
2. Observe water heater operation.
3. Check the Dual Temperature Sensor. Ensure it is
properly wired to the control, and that there are no
breaks, cuts, or other visible issues with the sensor wire.
4. Use an ohmmeter to check resistance on first Sensor B
of the Dual Temperature Sensor. Values should be close
to those given in Table 14
5. Replace Dual Temperature Sensor if either Sensor B
fails the resistance test.
F35
Dual Temperature Sensor A Error
Dual Temperature Sensor A is out of
normal operating range, meaning the
sensor is either open or shorted.
1. Manually reset the water heater.
2. Observe water heater operation.
3. Check the Dual Temperature Sensor. Ensure it is
properly wired to the control, and that there are no
breaks, cuts, or other visible issues with the sensor wire.
4. Use an ohmmeter to check resistance on first Sensor A
of the Dual Temperature Sensor. Values should be close
to those given in Table 14
5. Replace Dual Temperature Sensor if either Sensor A
fails the resistance test.
F82
Unstable Flame Lockout
The control detects an unstable
flame.
1. Manually reset the water heater.
2. Observe water heater operation.
3. If fault code occurs again check for stable gas pressure.
4. check Ignitor cable connections
5. Check Ignitor cable ground
6. Replace cable
7. Replace ignitor