Proheat M80 - Manual (Page 34)

PROHEAT G-I PCM SERVICE MANUAL 4-3
START Diagnostic Code 1
Indicates that the G-I PCM Flame Sensor did not detect a flame or the flame
was too weak to be detected during the FULL 30 second ignition period.
Troubleshoot the Start diagnostic code based on the following symptoms:
1. Fuel System. Go to page 4-4 to page 4-17, Steps 1 through 7.
a) There is no fuel, fuel odor or atomized fuel coming from the exhaust pipe.
b) There is no hot exhaust coming from the exhaust pipe.
2. Ignition System. Go to page 4-20.
a) There is raw fuel and/or atomized fuel and a raw fuel odor coming
from the exhaust pipe.
b) There is no hot exhaust coming from the exhaust pipe.
3. G-I PCM (PROHEAT Control Module) Flame Sensor circuit. Go to page 4-22.
a) There is a flame and the combustion sounds good, the PROHEAT
appears to be operating normally.
b) No smoke, raw fuel odor or atomized fuel is coming from the exhaust pipe.
4. Motor and/or G-I PCM fault. Go to page 4-24.
a) The Motor is NOT running. Ignition and Coolant Pump are operating.
b) No smoke, raw fuel odor or atomized fuel coming from the exhaust pipe.
4.1.2
(1 Flash)
The Motor and Coolant Pump start first, followed by the ignition spark, and
then Fuel Shut-off Valve opens. The Ignition Module sparks for 30 seconds
during which time the flame sensor must detect a proper flame. At the end of
the Ignition cycle the Flame Sensor checks the flame:
• In this error example, the PROHEAT does not detect proper flame and the
PROHEAT enters Error Detection – Cool Down (Purge).
3. Ignition
The PROHEAT always restarts after one error detection. After the 3 minute
Cool Down (Purge), the PROHEAT will go through Precheck, Ignition and the
Error Detection – Cool Down (Purge) cycle one more time.
5. Steps 2 to 4
are Repeated
After two consecutive Code 1 errors, the PROHEAT goes into a Fault Shut
Down state. No further start attempts will be made.
The ON/OFF switch lamp, timer lamp or OEM indicator light will continue to
flash once, pause and repeat.
NOTE: In order to restart the heater, turn the switch “OFF” and back “ON”.
6. Fault Shut
Down
The flame sensor did not “see” a flame by 30 seconds after entering ignition:
the fuel solenoid closes and the Motor and Coolant Pump continue to
operate for three minutes.
Code 01 will flash on the ON/OFF switch lamp, timer lamp or OEM indicator
(installation options). There will be one flash, pause and then one flash
repeating on the ON/OFF switch lamp, timer lamp or OEM indicator. After 3
minutes, the Motor and Coolant Pump stops and the PROHEAT attempts to
start again.
4. Error
Detection –
Cool Down
(Purge)