55
Installation and Maintenance
Service Manual
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Malfunction indicator of outdoor unit
Check
unit in cooling mode and check
the indoor
in heating mode
check points:
(including if the fan speed is too low)
tube temperature sensor of indoor and outdoor unit normal
Overload and high
temperature protection
Is outdoor ambient temperature
higher than 53
in cooling mode? /Is indoor and outdoor
ambient temperature too high in
heating mode?
Normal protection, please operate
it after the outdoor ambient temp-
erature is normalized.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
Improve the heat dissipation
environment of the unit
Does the indoor and outdoor fan
work normally?
Replace the
outdoor fan
End
Replace the fan
capacitor C1
1. Check if the fan terminal
OFAN is connected correctly
2. If the indoor and outdoor
motor is broken
Check if the temperature sensor is normal
according to the Resistance Table of Tube
Temperature Sensors(check outdoor tube
temperature in cooling mode and check
indoor tube temperature in heating mode)
Is the tube temperature sensor normal?
Replace corresponding
tube temp. sensor
Shut down the power and wait 20min
Replace corresponding control board (replace outdoor
control board in cooling mode and replace indoor control
board in heating mode)
