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Date: 8-4-2010
Revision: 0
Form: 2396
45
Code Description Recommended Troubleshooting of Lockout Codes Code
1. Check wiring and correct any potential wiring errors.
2. Check High Fire Switch to assure proper function (not welded
or jumpered).
3.Manually drive the motor to the High Fire position and adjust
the HF switch while in this position and verify voltage through
the switch to the HFS input with a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the
module.
152 Combustion
pressure ON
H or L
153 Combustion
Pressure Off
OEM Specific
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.
H or L
154 Purge Fan switch
On
H or L
155 Purge fan switch
OFF
OEM Specific
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.
H or L
156 Combustion
pressure and
Flame ON
H or L
157 Combustion
pressure and
Flame OFF
OEM Specific
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.
L
158 Main valve ON L
159 Main valve OFF
OEM Specific
1. Check Main Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace the
module.
L
160 Ignition ON L
161 Ignition OFF
OEM Specific
1. Check Ignition terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace the
module.
L
162 Pilot valve ON L
163 Pilot valve OFF
OEM Specific
1. Check Pilot Valve terminal wiring and correct any errors.
2. Reset and sequence the module. If fault persist, replace the
module.
L
164 Block intake ON OEM Specific L