Proheat M80 - Manual (Page 62)

PROHEAT G-I PCM SERVICE MANUAL 4-31
FLAME FAULT Diagnostic Code 6
Indicates that:
1. The PROHEAT reached 185°F (85°C) cycled off and entered Cool Down
(Purge). After 20 seconds a flame was still detected.
2. The PROHEAT was switched on and a flame (signal) was detected in
Pre-check.
Troubleshoot the Flame Fault diagnostic code based on:
1. Fuel System fault. Go to page 4-6 to page 4-17, Steps 3 to 7.
2. G-I PCM Flame Sensor circuit. Go to page 4-22.
TEMPERATURE SENSOR T1 Diagnostic Code 7 and/or 9
Indicates an electrical fault in the Temperature Sensor.
Troubleshoot the Temperature Sensor diagnostic code based on:
Whether the PROHEAT is equipped with a single Temperature Sensor or dual
Temperature Sensors.
Temperature Sensor and G-I PCM (single sensor) – Check:
a) Temperature Sensor and G-I PCM electrical function.
Test Procedure – Sensor and G-I PCM:
a) Remove Temperature Sensor connector from G-I PCM connection T1.
b) Remove the G-I PCM sealing plug from G-I PCM connection T2. Put
sealing plug into G-I PCM connection T1.
c) Reconnect the Temperature Sensor connector to G-I PCM connection T2.
d) Switch the PROHEAT on:
If a diagnostic code is indicated, the sensor is faulty. Go to Temperature
Sensor replacement.
4.1.7
(6 Flashes)
TEMP SENSOR T1: Step 1
(7 or 9 Flashes)
4.1.8
(7 or 9 Flashes)
Figure 4-37: Temperature Sensors
T2
T1
NOTICE
The temperature sensor may be
plugged into T2. The M-Series will
operate if the temperature sensor is
plugged into T1 or T2. If the sensor
if plugged into T2, reverse the
instructions as found in step a), b)
and c). ie: T1 will become T2, etc.