Laars MagnaTherm MGH1600, Инструкции по установке и эксплуатации для

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LAARS Heating Systems
Page 94
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.
154 Purge Fan switch On H or L 1. Purge fan switch is on when it should be off.
2. Check wiring and correct any errors.
3. Inspect the Purge Fan switch J6 terminal 3
and its connections. Make sure the switch
is working correctly and is not jumpered or
welded.
4. Reset and sequence the relay module.
5. If the fault persists, replace the relay module.
155 Purge fan switch OFF H or L
156 Combustion pressure and flame ON 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.
157 Combustion pressure and flame OFF L
158 Main valve ON L 1. Check Main Valve terminal wiring and correct
any errors.
2. Reset and sequence the module. If fault
persists, replace the module.
159 Main valve OFF L
160 Ignition ON L 1. Check Ignition terminal wiring and correct any
errors.
2. Reset and sequence the module. If fault
persists, replace the module.
161 Ignition OFF L
164 Block intake ON L 1. Check wiring and correct any errors.
2. Inspect the Block Intake Switch to make sure it
is working correctly.
3. Reset and sequence the module.
4. During Standby and Purge, measure the
voltage across the switch. Supply voltage
should be present. If not, the Block Intake
Switch is defective and needs replacing.
5. If the fault persists, replace the relay module.
165 Block intake OFF L
172 Main relay feedback incorrect L
Internal Fault.
1. Reset module.
2. If fault repeats, replace module. 174 Safety relay feedback incorrect L
175 Safety relay open L
176 Main relay ON at safe start check L
178 Safety relay ON at safe start check L