Proheat M80 - Manual (Page 66)

PROHEAT G-I PCM SERVICE MANUAL 4-35
TEMPERATURE SENSOR T2 Diagnostic Code 7 and/or 9
Go to Temperature Sensor T1 Diagnostic Code, page 4-31.
IGNITION MODULE Diagnostic Code 10
Indicates an over-load fault is detected.
Troubleshoot the Ignition Module diagnostic code based on:
Ignition Module and G-I PCM – electrical.
Test procedure – Ignition Module and G-I PCM:
a) Disconnect all harnesses at the G-I PCM.
b) Disconnect the fuel supply line.
c) Loosen and back out the burner head mounting (2) bolts five to six turns
allowing enough room to rotate the burner head 15° counter-clockwise
and remove.
d) Disconnect the Ignition Module connector at the G-I PCM.
e) Reconnect the power and switch harnesses at the G-I PCM.
f) Switch the PROHEAT on and operate for at least one complete cycle.
Observe the operation.
If an Ignition Module diagnostic code is NOT indicated and the PROHEAT
attempts to operate, the Ignition Module is faulty. Go to Ignition Module
replacement, page 4-21.
If the Ignition diagnostic code is indicated, the G-I PCM is faulty. Go to G-I
PCM replacement, page 4-41.
4.1.11
(10 Flashes)
4.1.10
(7 or 9 Flashes)
Figure 4-41: Burner Head Removal
MOUNTING EARS (2)
MOUNTING BOLTS (2)
TORQUE = SEE SECTION 1.3
COOLANT PUMP
SWITCH INPUT
TEMP SENSOR 1
POWER
FUEL INLET
NOTICE
All plugs/harnesses must be rein-
stalled into the Proheat Control
Module (G-I PCM) before heater goes
back into service.