44
Installation
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 box and the wired controller display.
Error
Error code Digital display
Emergency stop
A01
R32 refrigerant leaks, requiring shutdown immediately
A11
ODU fault
A51
The fault of the linked FAPU is transmitted to the master IDU (series setting)
A71
The fault of the linked humidifying IDU is transmitted to the master IDU
A72
The fault of the linked FAPU is transmitted to the master IDU (non-series
setting)
A73
The fault of the AHU Kit slave unit is sent to the master unit
A74
Self-check fault
A81
MS (refrigerant flow direction switching device) fault
A82
Mode conflict (V6 communication protocol adopted)
A91
1# EEV coil fault
b11
1# EEV body fault
b12
2# EEV coil fault
b13
2# EEV body fault
b14
Stall protection on 1# water pump
b34
Stall protection on 2# water pump
b35
Water level switch alarm
b36
Reheating electric heater fault
b71
Preprocessing electric heater fault
b72
Humidifier fault
b81
Duplicate IDU address code
C11
7
Summary of Contents for KSEF-22 DN5.0
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