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B
RADFORD
W
HITE
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
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.
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.
Code Description
Procedure
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.