59
Check
code
Diagnostic functional operation
Determination and action
Defect
frequency
confirmation
Operational cause
Backup
present
Automatic
reset
H01
Compressor breakdown
1 When the operation frequency lowers due
to the current release 40 sec or later after the
compressor activation and it stops by under
running the minimum frequency.
2 When the operation frequency lowers due
to the current limit control and it stops by
under running the minimum frequency.
3 When an excess current is detected 0.8 sec
or later after the compressor activation.
O
×
1. Check the power supply
voltage
(AC220 -230 V±10% single
phase type).
(AC380
– 400V ± 10% 3 phase
type)
2. Over-loaded condition of the
refrigeration cycle.
3. Check that the service valve
is fully open.
8
H02
Compressor lock
When the input current is more than zero 20
sec or later after the compressor activation
and the activation has not been completed.
O
×
1. Defect of compressor (lock)
–
Replace the compressor.
2. Defect of compressor wiring
(open phase).
8
H03
Defect in the current detection circuit
O
×
1. Replace the outdoor inverter
control board.
8
H04
Operation of case thermostat
When the case thermostat exceeds 125°C.
O
×
1. Check the refrigeration cycle
(gas leak).
2. Check the case thermostat
and connector.
3. Check that the service valve
is fully open.
4. Defect of the pulse motor
valve. 5. Check for kinked
piping.
4
L10
Unset service PC board jumper
Jumpers J800-J803 have not been cut.
O
×
1. Cut J800-J803.
1
L29
The communication between the outdoor
PC board MUCs error
No communication signal between IPDU and
CDB.
O
×
1. Replace the outdoor control
board.
1
P03
The outlet temperature error
When the discharge temperature sensor (TD)
exceeds 111°C.
O
×
1. Check the refrigeration cycle
(gas leak).
2. Defect of the pulse motor
valve.
3. Check the resistance value of
the discharge temperature
sensor (TD).
4
P04
The high pressure switch error
O
×
10
P05
The power supply voltage error
When the power supply voltage is extremely
high or low.
O
×
1. Check the power supply
voltage. (AC230 V±23 V)
4
P07
Overheating of heat-sink error
When the heat-sink exceeds 105°C.
O
×
1. Check the thread fastening
and heat-sink grease between
the outdoor control board and
the heat-sink.
2. Check the heat-sink fan duct.
3. Check the resistance value of
the heat-sink temperature
sensor (TH).
4
P15
Detection of gas leak
When the discharge temperature sensor (TD)
exceeds 106°C for consecutive 10 min. When
the suction temperature sensor (TS) exceeds
60°C for cooling or 40°C for heating for 10
consecutive min.
O
×
1. Check the refrigeration cycle
(gas leak).
2. Check that the service valve
is fully open.
3. Defect of the pulse motor
valve.
4. Check for kinked piping.
5. Check the resistance value of
the discharge temperature
sensor (TD) and the suction
temperature sensor (TS).
4
