Instructions / Assembly

55
WHL-015 REV. 8.24.16
Er:20
Condensate APS –
Closed is Normal, Open is
Fault (Condensate Drain
Trap)
Press the Power button to clear the Error Code.
1. Check Condensate and main controller connections. Ensure all are secure.
2. Check Condensate sensor resistance. If resistance is not zero, replace the switch.
3. Check Condensate hose. Ensure it is connected and in good condition.
4. Check condensate line and termination for blockages.
5. Check exhaust vent for blockages.
6. If the problem persists, replace the main control.
Er:28
Overheat Sensor Open or
Short
This Error Code will go away when CH temperature decreases.
If Error happens again:
1. Check overheat temperature sensor. Ensure connections are secure.
2. Check overheat sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:29
Flue APS Open - Closed
is Normal, Open is Fault
(Intake / Exhaust)
1. Check APS and connections.
2. If APS is open, replace the switch.
3. If APS is closed and connections are secure, check switch resistance. If resistance is not zero,
replace the switch.
4. Check condensate line and termination for blockages.
5. Check exhaust vent for blockages.
6. Press the Power button to clear the Error Code and restart appliance.
7. If the problem persists, replace the main control.
Er:30
Storage Tank Sensor
Fault
This Error Code will go away when storage tank water temperature decreases.
If Error happens again:
1. Check storage tank water temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:32
DHW Sensor Open or
Short
This Error Code will go away when outlet DHW temperature decreases.
If Error happens again:
1. Check DHW outlet temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:33
CH Temperature Sensor
Open or Short
This Error Code will go away when CH temperature decreases.
If Error happens again:
1. Check CH temperature sensor. Ensure connections are secure.
2. Check CH sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:35
Exhaust Sensor Open or
Short
This Error Code will go away when exhaust temperature decreases.
If Error happens again:
1. Check exhaust temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. Check exhaust vent for blockage.
4. If the problem persists, replace the main control.
Er:36
Abnormal Supply Voltage
Supply voltage is too low to operate. This Error Code will go away when supply voltage returns to
normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the requirements on the rating plate.
2. If problem persists, replace the main control.
Er:37
Abnormal Supply
Frequency
Supply frequency is too high to operate. This Error Code will go away when supply frequency returns
to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the requirements on the rating plate.
2. If problem persists, replace the main control.
Er:38
Error Appears When
Control Stores Data, but
Data is not Saved
Press the Power button to clear the Error Code.
Replace the main control.
Er:40
Gas Leakage is Detected
for Greater than 5
seconds, or three times
within 10 minutes
IMPORTANT: If you smell gas, STOP! Follow the instructions on page 2, this manual, and call a
qualified service technician or the fuel gas utility.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the appliance cover. Ensure it is secure.
2. Check gas connections for leakage with a soapy solution. Fix any leaks.
3. Check condition of the burner assembly.
4. If the problem persists, replace the main control.
Er:41
Fan Speed too High with
Flame On
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the vent connections for blockages.
2. Check the burner assembly.
3. Check fan operation. If fan appears to be operating normally but RPMs are too high, replace the fan.
4. If the problem persists, replace the main control.
Er:42
Jumped Wire
Disconnected
Press the Power button to clear the Error Code.
If Error happens again:
1. Ensure the jumped wire is properly connected.
2. If the problem persists, replace the main control.