105 750-265
160 Main valve OFF 1. Check Main Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace
the module.
161 Ignition OFF 1. Check Ignition terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace
the module.
162 Main valve ON 1. Check Main Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace
the module.
163 Pilot valve ON 1. Check Pilot Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace
the module.
164 Ignition ON 1. Check Ignition terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace
the module.
165 Combustion pressure 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 module.
4. During Standby and Purge, measure the voltage across
the switch. Supply voltage should be present. If not, the
Combustion Pressure Switch is defective and needs
replacing.
5. If the fault persists, replace the relay module.
166 No flame
167 Purge fan switch ON
168 Block intake 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.
169 Purge fan switch OFF
170 Combustion pressure/flame
171 Flame detected
172 Main relay feedback incorrect Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
173 Pilot relay feedback incorrect Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
174 Safety relay feedback incorrect Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
175 Safety relay open Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
176-183 RESERVED
Table 45. Fault Code and Troubleshooting. (Continued)
Code Description Recommended Troubleshooting of Lockout Codes