Enviroment: Local

Error Code

Code
Definition
Warning
02
No burner operation during freeze protection mode
03
Power interruption during Bath Fill (Water will not flow when power returns)
05
Bypass Servo” (on all water heaters with bypass valves) - On the RH-180 this is a “Air Filter Error”
07
Circulation Flow Rate has dropped below 2.1 gpm
10
Air Supply or Exhaust Blockage
11
No Ignition (heater not turning on)
12
Flame Failure
13
Combustion
14
Thermal Fuse has activated
16
Over Temperature Warning (Safety shutdown because unit is too hot)
19
Electrical Grounding
25
Condense Trap is full
30
Flammable Vapors Detected
31
Burner Sensor
32
Outgoing Water Temperature Sensor
33
Heat Exchanger Outgoing Sensor
34
Combustion air temperature sensor failure
35
Tank Temperature Sensor
38
CO Sensor
41
Freeze Protection Sensor
51
Inlet Water Temperature Sensor
52
Modulating Solenoid Valve Signal
57
Burner Overheat Bi-Metal Switch
58
Secondary Heat Exchanger Sensor
61
Combustion Fan Motor
63
Circulation Flow Rate dropped below 1.3 GPM
65
Water Flow Control
FE
Flammable Vapors Detected
FF
Maintenance has been performed
70
PC Board
71
Solenoid Valve Circuit
72
Flame Sensing Device
73
Burner Sensor Circuit
79
Water Leakage Detected
LC
Lime Scale Build-up
LC0
Lime Scale Build-up
LC1
Lime Scale Build-up
LC2
Lime Scale Build-up
LC3
Lime Scale Build-up
LC4
Lime Scale Build-up
LC5
Lime Scale Build-up
LC6
Lime Scale Build-up
LC7
Lime Scale Build-up
LC8
Lime Scale Build-up
LC9
Lime Scale Build-up