105
Rev 2.1
2. If fault repeats, consult factory
152 Combustion pressure ON 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.
153 Combustion Pressure Off
154 Purge Fan switch On 1. Purge fan switch is on when it should be off.
2. 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, consult factory.
155 Purge fan switch OFF
156 Combustion pressure and Flame ON 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 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,
consult factory.
157 Combustion pressure and Flame OFF
158 Main valve ON 1. Check Main Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, consult
factory.
159 Main valve OFF
160 Ignition ON 1. Check Ignition terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, consult
factory.
161 Ignition OFF
162 Pilot valve ON 1. Check Pilot Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, consult
factory.
163 Pilot valve OFF
164 Block intake ON Internal Fault
1. Reset Module.
2. If fault repeats, consult factory
165 Block intake OFF
172 Main relay feedback Incorrect Internal Fault.
1. Reset Module.
2. If fault repeats, consult factory.
L
173 Pilot relay feedback incorrect L
174 Safety relay feedback incorrect L
175 Safety relay open L
176 Main relay ON at safe start check L
177 Pilot relay ON at safe start check L
178 Safety relay ON at safe start check L
184 Invalid BLOWER/ HSI output setting 1. Return to Configuration mode and recheck selected
parameters, re-verify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, consult factory.
L
185 Invalid Delta T limit enable setting L
186 Invalid Delta T limit response setting L
187 Invalid DHW high limit enable setting L
188 Invalid DHW high limit response
Setting
L
189 Invalid Flame sensor type setting L
190 Invalid interrupted air switch enable Setting L
191 Invalid interrupted air switch start check enable
setting
L
192 Invalid igniter on during setting L
193 Invalid ignite failure delay setting L
194 Invalid ignite failure response setting L
195 Invalid ignite failure retries setting L
196 Invalid ignition source setting L
197 Invalid interlock open response setting L
198 Invalid interlock start check setting L
199 Invalid LCI enable setting L
200 Invalid light off rate setting L
201 Invalid light off rate proving setting L
202 Invalid Main Flame Establishing Period time
setting
L
203 Invalid MFEP flame failure response setting L
204 Invalid NTC sensor type setting L
205 Invalid Outlet high limit response setting L
206 Invalid Pilot Flame Establishing Period setting L
207 Invalid PII enable setting L
208 Invalid pilot test hold setting L
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General