NeoTherm Boilers and Water Heaters
Page 109
Code Description
L or
H
Procedure
129
Fan speed failed during preignition
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.
130
Fan speed failed during ignition
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.
131
Fan movement detected during standby H
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.
132
Fan speed failed during run
H
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.
137
ILK (Interlock) failed to close
H
1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure
proper function.
3. Verify voltage through the interlock string to
the interlock input with a voltmeter.
4. If steps 1-3 are correct and the fault persists,
replace the module.
149
Flame detected
H or
L
Holds if flame detected during Safe Start check up
to Flame Establishing period.
150
Flame not detected
H
Sequence returns to standby and restarts sequence
at the beginning of Purge after the HF switch
opens if flame detected during Safe Start check up
to Flame Establishing period.
152
Combustion pressure ON
H or
L
1. Check wiring and correct any errors.
2. Inspect the Combustion Pressure Switch to
make sure it is working correctly.
3. Reset and sequence the relay module.
4. During STANDBY and PREPURGE, measure
the voltage between J6 terminal 5 and L2 (N).
Supply voltage should be present. If not, the
lockout switch is defective and needs replacing.
5. If the fault persists, replace the relay module.
Summary of Contents for NTV1000
Page 2: ......
Page 35: ...NeoTherm Boilers and Water Heaters Page 31 Fig 20 Ladder Diagram...
Page 36: ...LAARS Heating Systems Page 32 Fig 21 Wiring Diagram...
Page 37: ...NeoTherm Boilers and Water Heaters Page 33...
Page 51: ...NeoTherm Boilers and Water Heaters Page 47 Fig 52 Connection Terminals...
Page 130: ...LAARS Heating Systems Page 126 Fig 140 Machine Frame and Rear Panel 13 3 PARTS ILLUSTRATIONS...
Page 131: ...NeoTherm Boilers and Water Heaters Page 127 Fig 141 Front Panel and Covers...
Page 132: ...LAARS Heating Systems Page 128 Fig 142 Burners and Combustion Chambers...
Page 134: ...LAARS Heating Systems Page 130 Fig 145 Electronic Components...
Page 135: ...NeoTherm Boilers and Water Heaters Page 131 Fig 146 Condensate Trap Fig 147 Control Bezel...
Page 136: ...LAARS Heating Systems Page 132 Fig 148 Flow Switch...
Page 137: ...NeoTherm Boilers and Water Heaters Page 133 This page intentionally left blank...