Proheat M80 - Manual (Page 65)

PROHEAT G-I PCM SERVICE MANUAL 4-34
4.1.9
(8 Flashes)
Figure 4-40: Burner Head Removal and Fuel Shut-off Valve Connection
FUEL SHUT-OFF VALVE
CONNECTION
LOCK
WARNING
To avoid the risk of shock and to
ensure that the PROHEAT does not
fire, disconnect the Ignition Module
connector at the G-I PCM.
MOUNTING EARS (2)
MOUNTING BOLTS (2)
TORQUE = SEE SECTION 1.3
COOLANT PUMP
SWITCH INPUT
TEMP SENSOR 1
POWER
FUEL INLET
FUEL SHUT-OFF VALVE Diagnostic Code 8
Indicates an electrical fault in the Fuel Shut-off Valve coil or in the G-I PCM
Fuel Shut-off Valve circuit.
Troubleshoot the Fuel Shut-off Valve diagnostic code based on:
Fuel Shut-off Valve Coil or PROHEAT G-I PCM electrical.
Test Procedure – Fuel Shut-off Valve and G-I PCM test:
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 Fuel Shut-off Valve connector at the G-I PCM.
e) Disconnect the Ignition Module connector at the G-I PCM
f) Reconnect the power, Temperature Sensor(s) and switch harnesses at
the G-I PCM.
g) Switch the PROHEAT on:
If a Fuel Shut-off Valve diagnostic code is NOT indicated and the
PROHEAT attempts to operate, the Fuel Shut-off Valve is faulty.
Go to Fuel Shut-off Valve replacement, page 4-10.
If the Fuel Shut-off Valve diagnostic code is still indicated, the G-I PCM is
faulty. Go to G-I PCM replacement, page 4-41.
NOTICE
All plugs/harnesses must be rein-
stalled into the Proheat Control
Module (G-I PCM) before heater goes
back into service.