American Standard TCWH-199-AS Installation Start-Up Maintenance Parts page 58

TANKLESS WATER HEATER
Error Code
Er:41
Er:42
Er:43
Er:61
Er:65
Er:66
Er:67
58
Error Code Description
Fan Speed too High with Flame On
Jumped Wire Disconnected
Burner Overheat Switch Open
Fan Speed Feedback Signal Abnormal
Supply Water Valve Error
Mixing Valve Error
AGM Error
Possible Remedies
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.
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.
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 resitance. If resistance is zero, replace the switch.
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 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, re-
place 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.
Press the Power button to clear the Error Code. If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the water
heater.
2. Check wiring connections to supply water valve. Ensure all are secure.
3. Replace supply water valve.
4. If the problem persists, replace the main control.
Press the Power button to clear the Error Code. If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the water
heater.
2. Check wiring connections to mixing valve. Ensure all are secure.
3. Replace mixing valve.
4. If the problem persists, replace the main control.
Press the Power button to clear the Error Code. If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the water
heater.
2. Ensure fan inlet hole is completely open after turning the power OFF
and ON.
3. Check wiring connections to the AGM. Ensure all are secure.
4. Check AGM operation.
5. Replace AGM components.
6. If the problem persists, replace the main control.