mrcool.com33
MAINTENANCE
4
No.
Error
Code
Malfunction
Name
Origin of
Malfunction
Signal
Control Description
8 F0
Malfunction of
indoor ambient
temperature
sensor at air
return port
Indoor ambient
temperature
sensor
If the indoor ambient temperature sensor detects open
circuit or short circuit for 5 seconds successively, indoor
ambient temperature sensor malfunction will be reported.
The unit can automatically resume operation after the
malfunction disappears. If indoor ambient temperature
sensor malfunction occurs in fan mode, only the error code
is displayed and the unit can work normally.
9 F1
Malfunction
of evaporator
temperature
sensor
Evaporator
temperature
sensor
If the indoor evaporator temperature sensor detects open
or short circuit for 5 seconds successively, evaporator
temperature sensor malfunction will be reported. The unit
can automatically resume operation after the malfunction
disappears. If evaporator temperature sensor malfunction
occurs is fan mode, only the error code is displayed and the
indoor unit can work normally.
10 F2
Malfunction
of condenser
temperature
sensor
Condenser
temperature
sensor
If the condenser temperature sensor detects open circuit
or short circuit for 5 seconds successively, condenser
temperature sensor malfunction will be reported. The unit
can automatically resume operation after the malfunction
disappears. If condenser temperature sensor malfunction
occurs in fan mode, only the error code is displayed and
the unit can work normally.
11 F3
Malfunction of
outdoor ambient
temperature
sensor
Outdoor ambient
temperature
sensor
If the outdoor ambient temperature sensor detects open
circuit or short circuit for 5 seconds successively, outdoor
ambient temperature sensor malfunction will be reported.
The unit can automatically resume operation after the
malfunction disappears. If outdoor ambient temperature
sensor malfunction occurs in fan mode, only the error code
is displayed and the indoor unit can work normally.
12 F4
Malfunction
of discharge
temperature
sensor
Discharge
temperature
sensor
If the discharge temperature sensor detects open circuit
or short circuit for 5 seconds successively after the
compressor has been operating for 3 minutes, discharge
temperature sensor malfunction will be reported. The unit
can automatically resume operation after the malfunction
disappears.
13 F5
Malfunction of
wired controller
temperature
sensor
Wired Controller
If the wired controller detects open circuit or short circuit
of its temperature sensor for 5 seconds successively,
wired controller temperature sensor malfunction will be
reported.
14 F6
Condenser mid-
tube thermistor
error
Condenser
mid-tube
temperature
sensor
If the condenser mid-tube temperature sensor detects
open circuit or short circuit for 5 seconds successively,
condenser mid-tube thermistor error will be reported. The
unit can automatically resume operation after the error
disappears. If condenser mid-tube thermistor error occurs
in fan mode, only the error code is displayed nd the unit
can work normally.
15 ee
Malfunction of
drive memory
chip
Drive board
If the memory chip of drive board is broken, the unit cannot
be started. The unit cannot be recovered automatically. If
the malfunction cannot be eliminated after switching o
the unit and then energizing the unit several times, replace
the drive board.
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