General Troubleshooting - Kaisai FLY INVERTER Series Service Manual

2. General Troubleshooting

2.1 Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer
lamp may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following
table:
Operation
lamp Timer lamp
flashes
1 time OFF
2 times OFF
3 times OFF
4 times OFF
5 times OFF
6 times OFF
9 times OFF
7 times OFF
1 time ON
2 times ON
3 times ON
4 times ON
5 times ON
6 times ON
1 time FL H
2 times FL H
3 times FL H
5 times FL H
For other errors:
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a
temperature reading.
Troubleshooting:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.
If the unit responds, the display board requires replacement.
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LED
Display
0 Indoor unit EEPROM parameter error
1 Indoor / outdoor units communication error
Zero-crossing signal detection error
The indoor fan speed is operating outside of the normal range
Indoor room temperature sensor T1 is in open circuit or has
4
short circuited
Evaporator coil temperature sensor T2 is in open circuit or
has short circuited
7 Indoor PCB /Display board communication error
C Refrigerant leak detected
F0 Overload current protection
Outdoor ambient temperature sensor T4 open circuit or
F1
short circuit
Condenser coil temperature sensor T3 is in open circuit or
F
has short circuited
Compressor discharge temperature sensor TP open circuit
F
or short circuit
F4 Outdoor unit EEPROM parameter error
F The outdoor fan speed is operating outside of the normal range
p0 IPM malfunction or IGBT over-strong current protection
p1 Over voltage or over low voltage protection
p High temperature protection of IPM module
p4 Inverter compressor drive error
Error Information Solution
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