17
Maintenance
■ Fault Code
-1represents the A system ,-2 represents the B system
Fault in air-condition flow switch
Compressor module three-phase AC input phase
sequence mission protection
4 times in 60min,
locked.
Three-phase AC input phase sequence error protection
Fault in return water temperature sensor
Fault in outlet water temperature sensor
Fault in outdoor ambient temperature sensor
Fault in communication of wired controller
Fault in communication of main board
Fault in overcurrent protection of system fan
High-pressure protection of system
3 times in 60min,
locked.
Over-current protection of system compressor
3 times in 60min,
locked.
Open circuit or short circuit in exhaust temperature
sensor of system compressor
Open circuit or short circuit in coil (outlet) temperature
sensor 1 of system
Open circuit in low-pressure sensor of system
Low pressure protection of system
3 times in 60min,
locked.
Open circuit or short circuit in suction temperature
sensor of system
Over temperature of exhaust temperature sensor of
system compressor
3 times in 60min,
locked.
Over temperature of coil (outlet) temperature sensor
1/2 of system
Open circuit or short circuit in coil (outlet) temperature
sensor 2 of system
Overload protection of system pump in air conditioning
side
Overload protection of system eletrical assisted heater
in air conditioning side
Overtop or low protection of outdoor ambient
temperature
Refrigerant lack protection of system
Overtop Temperature difference of in and out water
3 times in 60min,
locked.
Running time exceeded
Fault in EE of main board
Note:
1、 The 60 minutes time of the accumulated three times within 60 minutes is calculated with natural time;
2、
The flicker of the fault lamp is related to its corresponding number except that E72 does not flicker.
3 、
After 4 minutes of communication between the wired controller and the unit, it still displays "in
communication, please wait a moment..." The reason may be for multiple units to dial the code set to the
host.
After troubleshooting,recover after press the "+" and "-" combination keys of the line controller for 5
seconds or power failure of the unit.
4 、
,-3represents the C system ,-4 represents
the D system