TriangleTube Marquis TWH180, User Manual

Page: 22 / 28

20
Error Codes
Error
Code
Error Code Description Possible Remedies
Lockout
Type
33
Operating Temperature Sensor
Open or Short
This Error Code will go away when operating water temperature decreases.
If Error happens again:
1. Check operating 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.
Soft Lock
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.
Soft Lock
39
Flame Detected after Exiting a
Flame On Condition
This Error Code will go away when the false flame condition is remedied.
If Error happens again:
1. Check the water heater cover. Ensure it is secure. Flame detection sensor can de-
tect 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.
Soft Lock
40
Gas Leakage is Detected for 10 Min-
utes, or three times within One Hour
(Greater than 5 Seconds Each Time)
IMPORTANT: If you smell gas, STOP! Follow the instructions on the cover of this
manual, and call a qualified service technician or the gas utility.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the water heater 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.
Hard Lock
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 low
or too high, replace the fan.
4. If the problem persists, replace the main control.
Hard Lock
43 Burner Overheat Switch Open
Press the Power button to clear the Error Code.
If Error happens again:
1. Check burner overheat switch connections. Ensure connections are secure.
2. Check switch resistance. If resistance is zero, replace the switch.
3. If the problem persists, replace the main control.
Hard Lock
61
Fan Speed Feedback Signal
Abnormal
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the connections to the fan. Ensure all are secure.
2. If the fan does not rotate during the ignition sequence, check for 120V power at
the fan connection. If 120V power is present at the control, replace the fan. If the
blower does not have 120V power, check power at the control. If 120V power is not
present at the control, replace the control.
3. If the problem persists, replace the main control.
Soft Lock