Mustang TOP 21 - Maintenance and Repair; Malfunction Indicating Table

19
V. Maintenance and repair
1. Malfunction indicating table
CODE
Malfunction
Reason
Resolution
E 01
Failure of system 1 discharge
temperature sensor
The system 1 discharge
sensor is open or short circuit
Check or change the sensor
E 02
Failure of system 2 discharge
temperature sensor
The system 2 discharge
sensor is open or short circuit
Check or change the sensor
E 03
Failure of system 3 discharge
temperature sensor
The system 3 discharge
sensor is open or short circuit
Check or change the sensor
E 04
Failure of system 4 discharge
temperature sensor
The system 4 discharge
sensor is open or short circuit
Check or change the sensor
E 05
Failure of system 1 coil
temperature sensor
The system 1 coil
sensor is open or short circuit
Check or change the sensor
E 06
Failure of system 2 coil
temperature sensor
The system 2 coil
sensor is open or short circuit
Check or change the sensor
E 07
Failure of system 3 coil
temperature sensor
The system 3 coil
sensor is open or short circuit
Check or change the sensor
E 08
Failure of system 4 coil
temperature sensor
The system 4 coil
sensor is open or short circuit
Check or change the sensor
E 09
Failure of system 1 suction
temperature sensor
The system 1 suction
sensor is open or short circuit
Check or change the sensor
E 10
Failure of system 2 suction
temperature sensor
The system 2 suction
sensor is open or short circuit
Check or change the sensor
E 11
Failure of system 3 suction
temperature sensor
The system 3 suction
sensor is open or short circuit
Check or change the sensor
E 12
Failure of system 4 suction
temperature sensor
The system 4 suction
sensor is open or short circuit
Check or change the sensor
E 17
Failure of solar/ return
water temperature sensor
The sensor is open or
short circuit
Check or change the sensor
E 18
Failure of water outlet
temperature sensor
The sensor is open or
short circuit
Check or change the sensor
E 19
Failure of water inlet
temperature sensor
The sensor is open or
short circuit
Check or change the sensor
E 20
Failure of hot water tank
temperature sensor
The sensor is open or
short circuit
Check or change the sensor
E 21
Communication failure
Connection failure between
controller and main board
Check the communication cable between
controller and main board.
E 22
Failure of ambient
temperature sensor
The sensor is open or
short circuit
Check or change the sensor
E 25
Failure of Water Level Switch
Water level line got loose
or misplace
Check water level line normal or not
P 01
Water flow protection
Water flow volume is
too small or too large
Check the water system, water pump and
water flow switch.
P 02
System 1 high
pressure protection
System 1 high pressure
protection switch off
1. Check if the inlet water temp. is too high or if any
blockage
2. Check if the unit fan blade is so dirty that it
influences the efficiency of the heat exchanger.
3. Check if too much refrigerant.
4. Check if the set water tank temp. is too high.
P 03
System 2 high
pressure protection
System 2 high pressure
protection switch off
1. Check if the inlet water temp. is too high or if any
blockage
2. Check if the unit fan blade is so dirty that it
influences the efficiency of the heat exchanger.
3. Check if too much refrigerant.
4. Check if the setting water tank temp. is too high.