3-14
12PHR-N
Status of
indoor /
outdoor
units
Indication
by LED1
on
outdoor
unit*2
Malfunction No.
displayed on main unit
display section *1
Content of diagnosis
Inspection
location/method
Remedy
Main
category
Sub-
category
Main
category
Sub-category
Indoor/
outdoor units
in complete
shutdown
2 times
2
-0
Cycle
temperature
Compressor
hightemperature
error
(1) Check the outdoor
unit air outlet for
blockage.
(1) Ensure
unobstructed air flow
from the outdoor unit
air outlet.
(2) Check if the power
supply voltage is 200
V or higher at full
power.
(2) Connect power
supply of proper
voltage.
(3) Check the pipe
connections for
refrigerant leaks.
(3) Charge the
specified amount of
refrigerant.
(4) Measure resistance
of the outdoor unit
compressor thermistor.
(TH1: Approx. 53 kΩ
at 25°C)
(4) Replace the
outdoor unit
compressor thermistor
assembly.
(5) Check the
expansion valve for
proper operation.
(5) Replace the
expansion valve coil,
expansion valve or
outdoor unit control
PWB assembly.
Indoor unit
in operation
Outdoor unit
in temporary
stop
-1
Temporary stop
due to compressor
discharge overheat
*3
(Temporary stop for
cycle protection)
–
-2
Temporary stop
due to outdoor unit
heat exchanger
overheat *3
(Temporary stop for
cycle protection)
–
-3
Temporary stop
due to outdoor unit
heat exchanger
overheat *3
(Temporary stop for
cycle protection)
–
-4
Temporary stop
due to 2-way valve
freeze *3
(Temporary stop for
cycle protection)
–
Indoor unit
in operation
Outdoor unit
in temporary
stop
3 times
3
-0
Dry operation
Temporary
stop due to
dehumidifying
operation *3
(Temporary stop for
cycle protection)
–
Indoor/
outdoor units
in complete
shutdown
5 times
5
-0
Outdoor unit
thermistor
open-circuit
Heat exchanger
thermistor open
circuit error
1) Check connector
CN8 of the outdoor
unit thermistor for
secure installation.
1) Correct the
installation.
-1
Outside
temperature
thermistor open-
circuit error
(2) Measure resistance
of outdoor thermistors
TH1 to TH5.
(2) Replace the
outdoor unit thermistor
assembly.
-2
Suction thermistor
open-circuit error
(3) Check the lead
wires of thermistors
TH1 to TH5 on the
outdoor unit control
PWB for open-circuit
(3) Replace the
outdoor unit thermistor
assembly.
-3
2-way valve
thermistor open-
circuit error
(4) No abnormality
found in above
inspections (1) through
(3).
(4) Replace the
outdoor unit control
PWB assembly.
-4
Discharge
thermistor open-
circuit error
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Summary of Contents for 12PHR-N
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