Abbreviations

	OBD - Onboard diagnostics
	WABCO ATR Exclusive (ATC)
	The following describes the possible current and stored faults for Addresses 1, 2, 3, 4, 5, 6, E and F ..

	Address 1 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   150   2   Preliminary control valve Y 1 on/off air valves   95   7/19/20   Connector 1 A 32 coded incorrectly   90   9/21/22   Manual inputs incorrect   85   4/16   Water valve, bottom front right   80   5/17   Water valve, bottom front left   65   24   Temperature sensor on air outlet convector bottom front left   60   25   Temperature sensor on air outlet blower bottom front left   55   11   Temperature sensor on air outlet convector bottom front right   50   12   Temperature sensor on air outlet blower bottom front right   40   3   Bleed valve Y 7 or replacement resistance bleed valve spare wheel compartment   30   13   Compartment temperature sensor chair frame front
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   2   2   Preliminary control valve Y 1 on/off air valves   3   7/19/20   Connector 1 A 32 coded incorrectly   4   9/21/22   Manual inputs incorrect   5   4/16   Water valve, bottom front right   6   5/17   Water valve, bottom front left   9   24   Temperature sensor on air outlet convector bottom front left   10   25   Temperature sensor on air outlet blower bottom front left   11   11   Temperature sensor on air outlet convector bottom front right   12   12   Temperature sensor on air outlet blower bottom front right   14   3   Bleed valve Y 7 or replacement resistance bleed valve spare wheel compartment   16   13   Compartment temperature sensor chair frame front

 

	Address 2 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   95   7/19/20   Connector 1 A 31 coded incorrectly   90   9/21/22   Manual inputs incorrect   85   4/16   Water valve, bottom rear right   80   5/17   Water valve, bottom rear left   65   24   Temperature sensor on air outlet convector bottom rear left   60   25   Temperature sensor on air outlet blower bottom rear left   55   11   Temperature sensor on air outlet convector bottom rear right   50   12   Temperature sensor on air outlet blower bottom rear right   45   2   Compressor solenoid coupling (only for compressor without Vario drive)   40   3   Condenser fan relay (only for compressor without Vario drive)   35   23   Coolant temperature sensor (on inlet pipe for supplementary heating)   30   13   Compartment temperature sensor chair frame rear
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   3   7/19/20   Connector 1 A 31 coded incorrectly   4   9/21/22   Manual inputs incorrect   5   4/16   Water valve, bottom rear right   6   5/17   Water valve, bottom rear left   9   24   Temperature sensor on air outlet convector bottom rear left   10   25   Temperature sensor on air outlet blower bottom rear left   11   11   Temperature sensor on air outlet convector bottom rear right   12   12   Temperature sensor on air outlet blower bottom rear right   13   2   Compressor solenoid coupling (only for compressor without Vario drive)   14   3   Condenser fan relay (only for compressor without Vario drive)   15   23   Coolant temperature sensor (on inlet pipe for supplementary heating)   16   13   Compartment temperature sensor chair frame rear

 

	Address 3 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   95   7/19/20   Connector 1 A 29 coded incorrectly height = "25"  90   9/21/22   Manual inputs incorrect   85   4/16   Water valve ceiling left rear   80   5/17   Water valve ceiling left front   60   25   Temperature sensor on air outlet ceiling left front   50   12   Temperature sensor on air outlet ceiling left rear   45   2   Bleed valve top (bottom) valve Y 3 (1R14)   40   3   Bleed valve entrance 1 valve Y 7 (or Y 4)(spare wheel compartment)
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   3   7/19/20   Connector 1 A 29 coded incorrectly   4   9/21/22   Manual inputs incorrect   5   4/16   Water valve ceiling left rear   6   5/17   Water valve ceiling left front   10   25   Temperature sensor on air outlet ceiling left front   12   12   Temperature sensor on air outlet ceiling left rear   13   2   Bleed valve top (bottom) valve Y 3 (1R14)   14   3   Bleed valve entrance 1 valve Y 7 (or Y 4)(spare wheel compartment)

 

	Address 4 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   95   7/19/20   Connector 1 A 31 coded incorrectly   90   9/21/22   Manual inputs incorrect   85   4/16   Water valve ceiling right rear   80   5/17   Water valve ceiling right front   60   25   Temperature sensor on air outlet ceiling right front   50   12   Temperature sensor on air outlet ceiling right rear   45   2   Venting valves 1/3 valve Y 6   40   3   Venting valves 1/1 valve Y 5
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   3   7/19/20   Connector 1 A 31 coded incorrectly   4   9/21/22   Manual inputs incorrect   5   4/16   Water valve ceiling right rear   6   5/17   Water valve ceiling right front   10   25   Temperature sensor on air outlet ceiling right front   12   12   Temperature sensor on air outlet ceiling right rear   13   2   Venting valves 1/3 valve Y 6   14   3   Venting valves 1/1 valve Y 5

 

	Address 5 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   100   11   Coolant circuit guard switch triggered (LP or HP)(only vehicles before 1995)   95   7/19/20   Connector 1 A 33 coded incorrectly   85   2   Compressor magnetic coupling   75   17   Condenser fan relay 1/2 (relay and start-up modules)   70   5   Condenser fan relay 1/1 (relay and start-up modules)   65   24   Start-up module 1 (replacement resistance 4 R 1)   60   25   Start-up module 3 (replacement resistance 4 R 2)   55   3   Start-up module 4 (replacement resistance 4 R 3)   50   12   Start-up module 2 (replacement resistance 4 R 4)   45   8   Compressor rpm sensor   40   13   Start-up module 5N1 for Vario drive (compressor) speed control   35   9   Terminal 50 drive switch (starter)   305   21   Generator terminal W (engine rpm)
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   2   11   Coolant circuit guard switch triggered (LP or HP)(only vehicles before 1995)   3   7/19/20   Connector 1 A 33 coded incorrectly   5   2   Compressor magnetic coupling   7   17   Condenser fan relay 1/2 (relay and start-up modules)   8   5   Condenser fan relay 1/1 (relay and start-up modules)   9   24   Start-up module 1 (replacement resistance 4 R 1)   10   25   Start-up module 3 (replacement resistance 4 R 2)   11   3   Start-up module 4 (replacement resistance 4 R 3)   12   12   Start-up module 2 (replacement resistance 4 R 4)   13   8   Compressor rpm sensor   14   13   Start-up module 5N1 for Vario drive (compressor) speed control   15   9   Terminal 50 drive switch (starter)   16   21   Generator terminal W (engine rpm)

 

	Address 6 Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   95   7/19/20   Connector 1 A 30 coded incorrectly   90   9/21/22   Manual inputs incorrect   80   5/17   Water valve in entrance 2   65   24   Temperature sensor on air outlet in entrance 2   45   2/10   Blower in entrance 2
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   3   7/19/20   Connector 1 A 30 coded incorrectly   4   9/21/22   Manual inputs incorrect   6   5/17   Water valve in entrance 2   9   24   Temperature sensor on air outlet in entrance 2   13   2/10   Blower in entrance 2

 

	Address E Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   Checksum fault (incorrect control unit)   95   2   Control unit, main water valve, earth terminal (if present)   90   15/26   Main water pump relay   85   34   Outside temperature sensor:   80   24/25   Driver's seat water valve   75   35   Temperature sensor on driver's seat air outlet   65   14   Speed signal (v-pulse) tachometer   60   13/20/21   Water preheating unit relay   55   17/22/23   Fresh air/recirculation valve driver's seat (electric motor below)   50   7/8/33   Supplementary fresh air valve driver's seat (electric motor below)   45   3/6/16   Air quantity footwell driver's seat (electric motor)   40   3/4/31   Air quantity windscreen defrosting driver's seat (electric motor)   30   10   Bleed valve, valve Y 2 and 2 R 7
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   Checksum fault (incorrect control unit)   3   2   Control unit, main water valve, earth terminal (if present)   4   15/26   Main water pump relay   5   34   Outside temperature sensor:   6   24/25   Driver's seat water valve   7   35   Temperature sensor on driver's seat air outlet   9   14   Speed signal (v-pulse) tachometer   10   13/20/21   Water preheating unit relay   11   17/22/23   Fresh air/recirculation valve driver's seat (electric motor below)   12   7/8/33   Supplementary fresh air valve driver's seat (electric motor below)   13   3/6/16   Air quantity footwell driver's seat (electric motor)   14   3/4/31   Air quantity windscreen defrosting driver's seat (electric motor)   16   10   Bleed valve, valve Y 2 and 2 R 7

 

	Address F Current fault: Meaning of the fault code   Possible current fault:   FC   ECU pin number   Fault description   210   --   EEPROM - checksum fault   199   29   Address 1 (control unit bottom front) missing   99   13   Address 2 (control unit bottom rear) missing   97   13   Address 3 (control unit ceiling left) missing   96   29   Address 4 (control unit ceiling right) missing   95   29   Address 5 (control unit compressor Variodrive) missing   94   13   Address 6 (control unit entrance 2) missing   98   13   Address E (control unit with driver's seat control panel) missing   50   8   Second run relay short circuit   40   3/4/5   Manual outputs short circuit   35   35   High pressure guard switch   30   32   Low pressure guard switch
	Stored fault: Meaning of bar indication
	Possible stored faults (missing segment in bar indication, for example see picture):   FC   ECU pin number   Fault description   1   --   EEPROM - checksum fault   2   29   Address 1 (control unit bottom front) missing   3   13   Address 2 (control unit bottom rear) missing   4   13   Address 3 (control unit ceiling left) missing   5   29   Address 4 (control unit ceiling right) missing   6   29   Address 5 (control unit compressor Variodrive) missing   7   13   Address 6 (control unit entrance 2) missing   12   13   Address E (control unit with driver's seat control panel) missing   13   8   Second run relay short circuit   14   3/4/5   Manual outputs short circuit   15   35   High pressure guard switch   16   32   Low pressure guard switch