Westinghouse WBRC 140 Series Installation, Start-Up, Maintenance, Parts, Warranty page 54

54
Error Code
Error Code
Description
Mixing Valve Opera-
tion Error
Er:68
(Mixing Valve Stuck in
Initial Position)
Register, Ram, Rom, I/O
Port, AD Abnormal, Im-
Er:70
portant EPROM Data
or Safe Data Abnormal
Flame Signal Detected
Er:72
before Ignition
Er:76
Poor Communication
Outdoor Sensor
Er:77
Shorted
Low Water Level
Sensor
Er:80
(Low Water Level
Detected four [4] Con-
secutive Times)
Er:81
Low Water Level Circuit
Freeze Protection
(Boiler has detected
Er:85
water temperature
o
below 34 F [1
Exhaust NTC detects
Vent Temperature is
Er:94
Greater than 190
o
(88 C)
Table 30 - Error Codes and Suggested Corrective Actions
This boiler is equipped with a blocked vent shutoff system. If Error Codes Er:29, Er:41, Er: 42, or Er:94 occur, turn off the gas valve at the
manual shutoff. Check the vent terminations for obstructions. If no obstructions are found, reset the boiler by pressing the power button.
If the error continues to occur, call a qualified service technician or the gas supplier to check the boiler. Failure to follow these instructions
could result in property damage, personal injury, or death.
whl-648 Rev. 001 Rel. 003 Date 10.8.19
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the boiler.
2. Check wiring connections to mixing valve. Ensure all are secure.
3. Replace mixing valve.
4. If the problem persists, replace the main control.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the boiler.
2. If the problem persists, replace the main control.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the boiler cover. Ensure it is secure. Flame detection sensor can detect an external light source.
2. Check flame detection sensor. Ensure connections are secure. Normal operating settings are more than 2.5DC
before ignition, less than 2.5DC after ignition.
3. If the problem persists, replace the main control.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check connections from main control to display panel (error occurs if there is no communication for ten [10]
minutes).
2. If the problem persists, replace the display and/or the main control.
The Error Code will go away when the condition is remedied.
If Error happens again:
1. Check outdoor sensor. Ensure all wiring connections are intact and secure. If the sensor wires were secured to the
wall with staples, the wires may have been damaged.
2. Check outdoor sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the outdoor sensor.
NOTE: When this error occurs, the boiler will still operate at the max setting of the Outdoor Reset Curve.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure all valves are open to the boiler and there are no leaks.
2. Ensure all air has been purged from the system.
3. Check wiring connections to low water level sensor. Ensure all are secure.
4. Check low water level sensor resistance. If resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure the system is filled with water. Ensure all valves are open to the boiler and there are no leaks.
2. Check wiring connections to low water level sensor. Ensure all are secure.
3. Check low water level sensor resistance. If resistance is zero, replace the sensor.
4. If the problem persists, replace the main control.
This Error Code will go away when the freezing condition is remedied.
If Error happens again:
1. Ensure boiler is located in a mechanical room protected from freezing conditions.
2. Ensure all valves are open to the boiler and there are no leaks.
3. Check wiring connections to the supply temperature (OP) sensor. Ensure all are secure.
o
C])
4. Check supply temperature (OP) sensor resistance. If resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2. Check exhaust temperature sensor. Ensure connections are secure.
o
F 3. Check sensor resistance. If resistance is zero, replace the sensor.
4. Check exhaust vent for blockage.
5. If the problem persists, replace the control.
6. If the problem persists, replace the heat exchanger.
WARNING
!
Possible Remedies