Laars NTV, Инструкция по установке и эксплуатации

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Page 68
LAARS Heating Systems
149 Flame detected H or L Holds if fl ame 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 fl ame 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 1. Purge fan switch is off when it should be on.
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.
156 Combustion
pressure and
fl ame ON
H or L 1. Check that fl ame is not present in the combustion chamber. Correct
any errors.
2. Make sure that the fl ame 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 fl ame detector.
5. Reset and sequence the module, if code reappears, replace the module.
157 Combustion
pressure and
fl ame OFF
L 1. Check that fl ame is not present in the combustion chamber. Correct
any errors.
2. Make sure that the fl ame 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 fl ame detector.
5. Reset and sequence the module, if code reappears, replace the module.
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 1. Check Main Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persists, replace the module.
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 1. Check Ignition terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persists, replace the module.
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.