Proheat M80 - Manual (Page 52)

PROHEAT G-I PCM SERVICE MANUAL 4-21
e) Reconnect the power and switch harnesses.
f) Switch the PROHEAT on and observe for a spark. Spark will continue for
five seconds.
If the spark is OK, reinstall the burner head and review Fuel System
troubleshooting, page 4-3.
If there is no spark check G-I PCM ignition output voltage.
Test Procedure – G-I PCM ignition output voltage:
a) Disconnect the Ignition Module and the Fuel Shut-off Valve connectors
(ensure no flow) at the G-I PCM.
b) Reconnect all external harnesses at the G-I PCM.
c) Switch the PROHEAT on and measure across pins A and C of the G-I PCM
Ignition Module connection.
If the correct system voltage (12 or 24) is measured, then measure
across pins A and B (should read system voltage during ignition).
If both of the measurements are correct, then replace Ignition Module.
Go to Ignition Module replacement.
If either of these measurements are incorrect, the G-I PCM is faulty. Go
to G-I PCM replacement, page 4-41.
Ignition Module replacement:
a) Remove ignition electrode assembly. Use a flat head screwdriver to pry
the electrode assembly out.
b) Remove the flame shield. Rotate to match the mounting square.
c) Remove Ignition Module (2) mounting screws and Module.
d) Reinstall the new Ignition Module.
e) Reinstall flame shield and electrode assembly.
Figure 4-24: G-I PCM Ignition Module Connection Measurement
LOCK
Figure 4-23: Connector Removal
A B C
(+) (-)
WARNING
Keep blower housing on to avoid
injury when Motor starts up.
NOTICE
All plugs/harnesses must be rein-
stalled into the Proheat Control
Module (G-I PCM) before heater goes
back into service.
NOTICE
All plugs/harnesses must be rein-
stalled into the Proheat Control
Module (G-I PCM) before heater goes
back into service.