Laars MagnaTherm MGH1600 Installation And Operation Instructions For page 96

Page 92
100 Pressure Sensor Fault
105 Flame detected out of sequence
106 Flame lost in MFEP
107 Flame lost early in run
108 Flame lost in run
109 Ignition failed
110 Ignition failure occurred
111 Flame current lower than weak
threshold
113 Flame circuit timeout
119 Control Interaction Fault
H 1. Verify the Pressure Sensor is a 4-20 ma
source.
2. Check wiring and correct any possible errors.
3. Test Pressure Sensor for correct operation.
4. Replace the Pressure sensor.
5. If previous steps are correct and fault persists,
replace the module.
H or L 1. Check that flame is not present in the
combustion chamber. Correct any errors.
2. Make sure that the flame detector is wired to
the correct terminal.
3. Make sure the F & G wires are protected from
stray noise pickup.
4. Reset and sequence the module, if code
reappears, replace the flame detector.
5. Reset and sequence the module, if code
reappears, replace the module.
L 1. Check main valve wiring and operation - correct
any errors.
2. Check the fuel supply.
3. Check fuel pressure and repeat turndown tests.
L
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.
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
L
detector, flame detector siting or flame rod
position.
5. If steps 1 through 4 are correct and the fault
persists, replace the module.
H Hold time of recycle and hold option. Will not be
a lockout fault. Hold Only. Internal hardware test.
Not a lockout.
H Hold time of recycle and hold option. Will not be
a lockout fault. Hold Only. Internal hardware test.
Not a lockout.
L Flame sensed during Initiate or off cycle, hold 240
seconds, if present after 240 seconds, system will
lockout.
H Flap valve identifications configured incorrectly.
LAARS Heating Systems