4
Application Control
Error Codes and Definitions
In the following circumstances (warning failures excluded), please stop the air conditioner immediately, cut off the power
switch and contact the local air conditioner customer service center. The error code is displayed on the display panel and
the wired controller display.
Emergency stop
R32 refrigerant leaks, requiring shutdown immediately
ODU fault
The fault of the linked FAPU is transmitted to the master IDU (series setting)
The fault of the linked humidifying IDU is transmitted to the master IDU
The fault of the linked FAPU is transmitted to the master IDU (non-series setting)
The fault of the AHU Kit slave unit is sent to the master unit
Self-check fault
MS (refrigerant flow direction switching device) fault
Mode conflict (V6 communication protocol adopted)
1# EEV coil fault
1# EEV body fault
2# EEV coil fault
2# EEV body fault
Stall protection on 1# water pump
Stall protection on 2# water pump
Water level switch alarm
Reheating electric heater fault
Preprocessing electric heater fault
Humidifier fault
Duplicate IDU address code
Error
56
Installation
Error code
Digital display
A01
A11
A51
A71
A72
A73
A74
A81
A82
A91
b11
b12
b13
b14
b34
b35
b36
b71
b72
b81
C11