This instruction show you the guideline to solve Scania truck auxiliary heater system flame monitor error.
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ATA 153
Flame monitor
Error identification
The flame disappears in the MAX position.
Cause
The flame disappears when the temperature exceeds 90°C and the auxiliary heater is in the MAX operating mode.
Notes
Action
Check that the exhaust pipe for the combustion air fan is not blocked.
Check the combustion chamber.
Check the fuel supply.
Check the flame monitor.
Check the glow plug. See the Internal electrical diagram under Connections. Measurement points 1 and 2 in harness-to-harness connector B for the control unit.
Resistance:
2 +/- 0.2 ohms.
Instructions for the checking procedures are found in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
ATA 154
Flame monitor
Error identification
The flame disappears in the HIGH position.
Cause
The flame disappears when the temperature exceeds 90°C and the auxiliary heater is in the HIGH operating mode.
Notes
Action
Check the fuel supply.
Check that the exhaust pipe for the combustion air fan is not blocked.
Check the combustion chamber.
Check the flame monitor.
Check the glow plug. See internal electrical diagram. Measurement points 1 and 2 in harness-to-harness connector B for the control unit.
Resistance:
2 +/- 0.2 ohms.
Instructions for the checking procedures are found in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
ATA 155
Flame monitor
Error identification
The flame disappears in the INTERMEDIATE position.
Cause
The flame disappears when the temperature exceeds 90°C at ATA 1 or 85°C at ATA 2 and the auxiliary heater is in the INTERMEDIATE operating mode.
Notes
Action
Check the fuel supply.
Check that the exhaust pipe for the combustion air fan is not blocked.
Check the combustion chamber.
Check the flame monitor.
Check the glow plug. See the Internal wiring diagram under Connections. Measurement points 1 and 2 in connector B for the control unit.
Resistance:
2 +/- 0.2 ohms.
Instructions for the checking procedures are found in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
ATA 156
Flame monitor
Error identification
The flame disappears in the LOW position.
Cause
The flame disappears when the temperature exceeds 95°C at ATA 1 or 80°C at ATA 2 and the auxiliary heater is in the LOW operating mode.
Notes
Action
Check the fuel supply.
Check that the exhaust pipe for the combustion air fan is not blocked.
Check the combustion chamber.
Check the flame monitor.
Check the glow plug. See the Internal electrical diagram under Connections. Measurement points 1 and 2 in harness-to-harness connector B for the control unit.
Resistance:
2 +/- 0.2 ohms.
Instructions for the checking procedures are found in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
ATA 164
Flame monitor
Error identification
Prohibited voltage level in the circuit for the flame monitor.
Cause
Open circuit in the flame monitor circuit.
Notes
Action
Check the flame monitor.
The checking procedure is described in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
ATA 165
Flame monitor
Error identification
Prohibited voltage level in the circuit for the flame monitor.
Cause
Short circuit in the flame monitor circuit.
Notes
Action
Check the flame monitor.
The checking procedure is described in the work description in Multi under 18-90 “H13, ATA Auxiliary heater – air”.
For more information about Scania truck,please refer to:Scania Trouble Repair.