SMART CELLAR INVERTER COOLING UNIT
16
Overload
protection for
compressor
H3
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stop operation.
The Wiring terminal OVC-COMP is
loose. In the normal state the
resistance for the terminal should be
less than 1 ohm. Refer to malfunction
analysis (discharge protection
overload)
17
IPM
protection
H5
During cooling operation, the
compressor will stop while the
indoor fan operates, during heating
operation the complete unit will
stop operation.
Refer to the malfunction analysis (IPM
protection, loss of synchronism
protection and overcurrent protection
of compressor windings
18
Desynchroni
zing of
compressor
H7
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stop operation.
Refer to malfunction analysis (IPM
protection, loss of synchronism
protection and overcurrent
compressor protection of phase
current.
19
Failure start
up
LC
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stop operation.
Refer to the malfunction analysis
20
Malfunction
of phase
current
detection
circuit for
compressor
U1
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stop operation.
Replace outdoor control panel AP1
21
EEPROM
malfunction
EE
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stop operation.
Replace outdoor control panel AP1
22
Charging
malfunction
of capacitor
PU
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stipo operation.
Refer to the part three- charging
malfunction analysis of capacitor
23
Malfunction
of module
temperature
sensor circuit
P7
During cooling and drying
operation, the compressor will stop
while the indoor fan operates,
during heating operation the
complete unit will stipo operation.
Replace outdoor control panel AP1
24
Module high
temperature
protection
P8
During cooling operation, the
compressor will stop while indoor
fan will operate, during heating
operation complete unit will stop.
After the complete unit de-energized
for 20 minutes, check whether the
white thermal grease on IPM module /
aluminium heat sink control panel
AP1 is sufficient and whether the
aluminium heat sink is firmly
securected by no.1 phillips screws. If
the aluminium heat sink is secured
correctly replace the AP1 panel.
25
Malfunction
of voltage
dropping for
DC bus bar
U3
During drying and cooling
operation the compressor will stop
while the indoor fan operates
during the heating function
complete unit will stop.
Supply voltage is unstable
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