Appendix D - Spheros Preheater Flash Codes - PREVOST X3-45 COACH 2018 Operator's Manual

Appendix D – Spheros Preheater Flash Codes
OPERATIONAL FAILURE SYMPTOMS VIA FAULT/FLASH CODE
The following table lists the possible faults which can be read by flashing code off of an appropriate timer,
the equipment-on indicator /operation indicator flashes.
Failure Symptom
1X Flash (F 01)
No combustion after
completion of start up
sequence.
2X Flashes (F 02)
Flame out during
burner operation no
restart possible
3X Flashes (F 03)
Low voltage for more
than 20 seconds
4X Flashes (F 04)
Flame detector
recognizes false flame
signal during pre-start
or shut-down cycle
5X Flashes (F 05)
Flame detector
6X Flashes (F 06)
Temperature sensor
7X Flashes (F 07)
Fuel solenoid valve
8X Flashes (F 08)
Combustion air fan
motor
9X Flashes (F 09)
Circulation pump motor
10X Flashes (F 10)
Temperature limiter
11X Flashes (F 11)
Electronic ignition coil
12X Flashes (F 12)
Heater lock out
Probable Cause
- Fuel system
- Combustion air
- Electronic ignition
- Fuel supply (shortage of fuel)
- Electrical system
- Defective flame detector
- Wiring
- Defective flame detector
- Wiring
- Defective temperature sensor
- Wiring
- Defective solenoid valve
- Wiring
- Wrong RPM
- Defective combustion air fan motor
- Wiring
- Defective circulation pump motor
- Overheat condition
- Coolant flow
- Wiring
- Defective temperature limiter
- Wiring
- Defective electronic ignition coil
- 3 repeated faults/flame-outs or
5 repeated start attempts
PA1627 X3-45 Operator's Manual
Check and Correct
- Fuel level
- Type of fuel being used
- Fuel filter
- Fuel line connections (air bubbles in fuel lines)
- Fuel nozzle plugged
- Air intake or exhaust, restricted or plugged
- Incorrect electrode gap
- Restriction in the fuel system
- Fuel filter
- Fuel line connections (air bubbles in fuel lines)
- Type of fuel being used
- Load test batteries
- Corrosion at connections
- Loose connections
- Replace flame detector
- Damaged wiring, open or short circuit
- Replace flame detector
- Damaged wiring, open or short circuit
- Replace temperature sensor
- Damaged or corroded wiring, open or short
circuit
- Replace solenoid valve
- Damaged wiring, open or short circuit
- Replace combustion air fan
- Replace combustion air fan
- Damaged wiring, open or short circuit
- Replace circulation pump motor
- Reset temperature limiter
- Coolant level or flow restriction
- Air trapped in coolant circuit
- Damaged or corroded wiring, open or short
circuit
- Replace temperature limiter
- Damaged wiring, open or short circuit
- Replace electronic ignition coil
- Reinitialize control unit by switching heater on
and disconnecting power.
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