Proheat M125 - Manual (Page 60)

4-23 PROHEAT M-SERIES G-II PCM SERVICE MANUAL
FLAME OUT Diagnostic Code 2
Indicates that a flame was detected but it could not be maintained or after
being established the flame went out before reaching the cycle off
temperature of 185°F (85°C).
Flame Out sequence:
a) A flame is detected during the Ignition period or during Full Output.
b) The flame goes out.
c) The ignition is switched on for a maximum of 10 seconds to try and
reestablish the flame (Ignition periods will be 10 seconds longer in
cases where the Flame Out occurred during the Ignition period).
d) If the flame is not established the Flame Out diagnostic code is displayed.
A Flame Out diagnostic code distinguishes that:
a) A flame was detected therefore there was a spark and the Ignition
system works.
b) The flame was detected therefore the Flame Sensor works.
c) The fault is in the fuel supply system.
Troubleshoot the Flame Out diagnostic code based on:
1. Fuel supply to the PROHEAT. Go to page 4-5 & page 4-6, Step 1 & 2.
• Fuel tank pick-up.
• Fuel fittings.
• Fuel lines.
• OEM supplied filters and check valves.
2. PROHEAT fuel system. Go to page 4-7 to page 4-17, Steps 3 to 7.
• Fuel Supply Pump
• Air Compressor
• Fuel Regulator
• Fuel Solenoid Valve
3. Operational symptoms that may occur in conjunction with a Flame Out
code. Go to page 4-5 to page 4-17, Steps 1 to 7.
• Combustion hesitation or coughing.
• Backfiring.
• Smoke.
• Strong diesel fuel odor.
4.1.3
(2 Flashes)