Proheat M105 G-II PCM, Service Manual

Page: 59 / 90

Figure 4-25: Combustion Tube Orientation.
ORIENTATION BOSS
HEAT EXCHANGER FLANGE NOTCH
MOUNTING BOLTS
TORQUE = SEE SECTION 1.3
G-II PCM
STATUS
LIGHT
Figure 4-24: Remote Test Switch Connection.
g) Place a finger over the sensor port located on the burner head flange.
The G-II G-II PCM status light should go out. Remove your finger and shine
a flashlight into the sensor, the G-II PCM status light should come on (Green).
If the G-II PCM status light reacts correctly, the Flame Sensor is OK.
Go to Test Procedure – Combustion Tube orientation.
If the G-II PCM status light does not react, the Flame Sensor is faulty.
Go to G-II PCM replacement, page 4-38.
Test Procedure – Combustion Tube orientation:
a) Ensure that the combustion tube orientation boss is aligned with the
heat exchanger flange notch.
b) Ensure that the combustion tube 'slits' are clean.
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PROHEAT M-SERIES G-II PCM SERVICE MANUAL