Ballu KFR-2501G/Y2BPE, Service Manual

Page: 37 / 70

8. TROUBLESHOOTING
36
In case of occurrence of a trouble during operation, the system stops itself, and then the
trouble description is displayed. If you want the trouble description to be reappeared,
press the “Sensor Switch” button and set the remote controller to the “Self Temperature
Control” and then to the “Remote Temperature Control”.
a. Model KFR-28GW/BPx2/2801 GW/BPx2
The trouble indicator and run indicator share a LCD (the symbol means flashing and
means constant light).
Trouble Display Code
Run Standby Timer High-
efficiency
Description of Trouble Cause of Trouble
1 Room temperature sensor
abnormal Thermistor short-circuited or
open circuited
2 Heat exchanger
temperature sensor
abnormal Thermistor short-circuited or
open circuited
3 Heat exchanger frozen
4 Heat exchanger overheated
5 Communication in trouble
8 Indoor fan in trouble
1 Outdoor ambient
temperature sensor
abnormal Thermistor short-circuited or
open circuited
2 Outdoor heat exchanger
temperature sensor
abnormal Thermistor short-circuited or
open circuited
3 Compressor overheated Thermistor short-circuited or
open circuited, or compressor
overheated
4 Outdoor capillary tube A
temperature sensor in
trouble Thermistor short-circuited or
open circuited
5 Outdoor capillary tube B
temperature sensor in
trouble Thermistor short-circuited or
open circuited
6 Overcurrent trouble Too large electric current in the
outdoor unit
7 No load Compressor not connected or the
module damaged
8 Supply voltage abnormal Too high or too low supply
voltage
9 Instantaneous interruption
of power