SMART CELLAR INVERTER COOLING UNIT
8
Indoor
evaporator
temperature
sensor is
open/short
circuited
F2
The unit will stop operation as it
reaches the temperature point.
During cooling and drying
operation, except indoor fan
operates, other loads stop
operation. During heating
operation, the complete unit stops
operation
1.
The wiring terminal between
indoor evaporator
temperature sensor and
controller is loosened
2.
Theres short circuit due to
the trip-over of the parts on
controller:
3.
Indoor evaporator
temperature sensor is
damaged (please check it by
referring to the resistance
table for temperature sensor)
4.
Main board is broken
9
Outdoor
ambient
temperature
sensor is
open/short
circuited
F3
During cooling and drying
operating, compressor stops while
indoor fan operates. During heating
operation, the complete unit will
stop operation.
Outdoor temperature sensor hasn't
been connected well or is damaged.
Please check it by referring to the
resistance table for the temperature
sensor.
10
Outdoor
condenser
temperature
sensor is
open/short
circuited
F4
During cooling and drying
operating, compressor stops while
indoor fan operates. During heating
operation, the complete unit will
stop operation.
Outdoor temperature sensor has not
been connected well or is damaged.
Please check it with the resistance
guide table in the service manual.
11
Outdoor
discharge
temperature
sensor is
open/short
circuited
F5
During cool and drying mode the
compressor will stop for 3 minuits
while indoor fan operates, during
heating operation the complete
system will stop after 3 minutes.
Outdoor temperature sensor has not
been connected well or is damaged.
Please check it with the resistance
guide table in the service manual. The
head of the sensor may not be
installed into the tube properly.
12
Voltage for
DC bus-bar
is too high
PH
During cool and drying mode the
compressor will stop, during
heating operation the complete
system will stop.
Measure voltage of position L & N on
wiring board (xt), if the voltage is
higher than 265vac turn the power off
to unit and wait until power supply is
normal. If the AC voltage is the normal
measure voltage of electrolytic
capacitor C on the control panel
(AP1), if this is normal there is a
malfunction of the circuit, please
replace control panel (AP1).
13
Malfunction
of complete
units current
detection
U5
During cool operation the
compressor will stop but the fan will
operate, during the heating
operation the complete unit will
stop.
There is a circuit malfunction of AP1,
please replace the AP1 control panel.
14
Overcurrent
protection of
phase
current for
compressor
P5
During cool operation the
compressor will stop but the fan will
operate, during the heating
operation the complete unit will
stop.
Refer to malfunction analysis (IPM
protection, loss of synchronism
protection and over current protection
of phase current for compressor.
15
Defrosting
Heating
indicator
off for 0.5s
and then
blinks for
10s
Defrost will occur in defrost mode,
and the compressor will operate
while the indoor fan stops.
It's the normal state
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