MagnaTherm Boilers and Water Heaters
Page 75
code Description
Lockout
or Hold
Procedure
108
Flame lost in run
L
1. check main valve wiring and operation -
correct any errors.
2. check the fuel supply.
3. check fuel pressure and repeat turndown tests.
4. Check ignition transformer electrode, flame
detector, flame detector siting or flame rod
position.
5. if steps 1 through 4 are correct and the fault
persists, replace the module.
109
ignition failed
L
1. check main valve wiring and operation -
correct any errors.
2. check the fuel supply.
3. check fuel pressure and repeat turndown tests.
4. Check ignition transformer electrode, flame
detector, flame detector siting or flame rod
position.
5. if steps 1 through 4 are correct and the fault
persists, replace the module.
110
ignition failure occurred
H
Hold time of recycle and hold option. will not be
a lockout fault. Hold Only. internal hardware test.
not a lockout.
111
Flame current lower than weak
threshold
H
Hold time of recycle and hold option. will not be
a lockout fault. Hold Only. internal hardware test.
not a lockout.
113
Flame circuit timeout
L
Flame sensed during initiate or off cycle, hold 240
seconds, if present after 240 seconds, system will
lockout.
119
control interaction Fault
H
Flap valve identifications configured incorrectly.
122
Lightoff rate proving failed
L
1. check wiring and correct any potential wiring
errors.
2. check VFD’s (Variable-speed Fan Drive)
ability to change speeds.
3. change the VFD
4. if the fault persists, replace the module.
123
Purge rate proving failed
L
1. check wiring and correct any potential wiring
errors.
2. check VFD’s (Variable-speed Fan Drive)
ability to change speeds.
3. change the VFD
4. if the fault persists, replace the module.
128
Fan speed failed during prepurge
H or L 1. check wiring and correct any potential wiring
errors.
2. check the VFDs (Variable-speed Fan Drive)
ability to change speeds.
3. change the VFD
4. if the fault persists, replace the module.
