Westinghouse WBRU 80W Series Installation, Start-Up And Maintenance Instructions page 58

Condensate – Closed
is Normal, Open is
Er:20
Fault (Condensate
Drain Trap)
Overheat Sensor Open
Er:28
or Short
Er:29 APS Open
System Sensor
Er:30
Short
Return Temperature
Er:31
Sensor Open or Short
Er:32 DHW Sensor Short
CH Temperature
Er:33
Sensor Open or Short
Exhaust Sensor Open
Er:35
or Short
Abnormal Supply
Er:37
Frequency
Error Appears When
Er:38 Control Stores Data,
but Data is not Saved
Gas Leakage is
Detected for Greater
Er:40 than 5 seconds, or
three times within 10
minutes
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.
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.
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 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 boiler.
7. If the problem persists, replace the main control.
NOTE: This error will only appear if the boiler is used in a cascaded system.
This Error Code will go away when system sensor is repaired or replaced.
1. Check system temperature sensor. Ensure connections are secure.
2. Check system sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
NOTE: During the error state the units will continue to operate. Boiler setpoint will be the same as the
system sensor setpoint until the issue is remedied. During normal operation boiler setpoint is defaulted to
o
20 F higher than the system setpoint to a maximum of 180
This Error Code will go away when operating temperature decreases.
If Error happens again:
1. Check return temperature sensor. Ensure connections are secure.
2. Check return sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
NOTE: This error will only appear if an aquastat is installed and SEnS is selected in Installer Mode 39, or a
sensor is used and it is shorted.
This Error Code will go away if an aquastat is installed, AquA is selected in Installer Mode 39, and the
boiler is powered OFF and ON, or the DHW sensor is repaired or replaced.
1. Check DHW sensor. If an aquastat, ensure AquA is selected in Installer Mode 39. If a sensor, ensure
connections are secure.
2. Check DHW sensor resistance. If resistance is zero or does not match that in Table 31, replace the
sensor.
3. After completing steps 1 and 2, power the boiler OFF. Then turn it back ON.
4. If the problem persists, replace the main control.
This Error Code will go away when operating 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.
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.
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.
Press the Power button to clear the Error Code.
Replace the main control.
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 boiler 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.
o
F setting.
WHL-032 REV. 6.2.16
58