DongFeng E70 User Manual

Troubleshooting
4.3-4
Trouble code
DTC Description
Fault causes
Recommended countermeasures
B2709
EXV failed
EXV in failure status
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
U0073
Body Can involves
BusOff
Body CAN network involves
BusOff
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
U0074
LIN communication
error
LIN network abnormal
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270A
AC communication loss
EXV communication loss
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270B
Tee water valve 1 failed
Tee water valve 1 failed
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B2713
Tee water valve 2 failed
Tee water valve 2 failed
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270C
Tee water valve 1
communication loss
Tee water valve
communication loss
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270D
Tee water valve 2
communication loss
Tee water valve
communication loss
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270E
Compressor abnormal
Compressor in failure status
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270E
Compressor
communication loss
Compressor communication
loss
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270E
Compressor
communication failure
Compressor communication
failure
1. Test the circuit. 2. Ask the professional
maintenance personnel for maintenance.
B270E
Compressor start-up
failed
Poor release or missing
phase of three-phase line
Replace the compressor (it is
recommended to notify the supplier to
check on site before replacing the
compressor).
B270E
Compressor hardware
protection
IGBT module is damaged.
Replace the compressor.
B270E
High compressor IPM
temperature
1. Poor heat dissipation; 2.
Too little refrigerant;
3. Leakage inside the
compressor.
1. Inspection the suction pressure,
exhaust pressure, and suction
temperature; 2. Replace the compressor.
B270E
Internal stall of
compressor
1. Dirty system; 2.Internal
damage of compressor; 3.
Impurities.
Replace the A/C compressor.
B270F
High compressor bus
current
1. High pressure switch
failure (component
failure/slow); 2. Excessive
refrigerant charging; 3.
Condenser fan inoperation.
1. Install the pressure sensor to the
vehicle. If the pressure rises, check the
A/C system. 2. High system pressure
(above 25 bar), so it is recommended to
add to the standard refrigerant volume
(30 ml recommended to be added after
refilling) ; 3. Check if the condenser fan is
working properly.
B2710
Low compressor
voltage
Low traction battery voltage
Charge the vehicle.
B2711
High compressor phase
current
1. Refrigerant slugging (high
instantaneous phase
current); 2. Refrigerant loop
blocked; 3. Much refrigerant;
4. Condenser fan damaged.
1. Re-vacuum and add refrigerant; 2.
High system pressure (above 25 bar), so
it is recommended to add to the standard
refrigerant volume (30 ml recommended
to be added after refilling) ; 3. Check if
the condenser fan is working properly.
B2712
High compressor
voltage
Output voltage of the high
voltage terminal exceeds the
operating voltage range of
the compressor.
Check if the high input voltage of the
compressor is higher than 405 V.

DongFeng E70 Specifications

General

Brand	DongFeng
Model	E70
Category	Automobile
Language	English