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Check code
Location
Outdoor 7-segment display
Main
remote
detection
Check
Sub-code
controller
code
IPDU
H03
H03
–
I/F
H04
H04
–
I/F
H06
H06
–
Indoor
unit
L03
–
–
I/F
L04
L04
–
I/F
L05
–
–
No. of priority
I/F
indoor units
L06
L06
of
Description
System status
Current
All stop
detection circuit
error
Compressor
All stop
case thermo
operation
Activation of
All stop
low-pressure
protection
Duplicated
Stop of
indoor outdoor
corresponding
unit
unit
Duplicated
All stop
outdoor line
address
Duplicated
All stop
priority indoor
unit (as
displayed on
priority indoor
unit)
Duplicated
All stop
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
99
122
Error detection
Check items (locations)
condition(s)
Current flow of at least
Check current detection
specified magnitude is
circuit wiring.
detected despite inverter
Check defect in outdoor
compressor having been shut
P.C. board (IPDU).
turned off.
Compressor case thermostat
Check compressor case
performed protective
thermo circuit.
operation.
(Connector, wiring, P.C.
board)
Check full opening of
service valve.
(Gas and liquid side)
Check outdoor PMV
clogging.
Check SV4 circuit leakage.
Check miswiring /
misinstallation of SV4.
Check valve open status of
indoor PMV.
Check 4-way valve error.
Check refrigerant amount
shortage.
Low-pressure Ps sensor
Check service valves to
detects operating pressure
confirm full opening
lower than 0.02 MPa.
(both gas and liquid sides).
Check outdoor PMV for
clogging.
Check for defect in SV2 or
SV4 circuits.
Check for defect in low-
pressure Ps sensor.
Check indoor filter for
clogging.
Check valve opening
status of indoor PMV.
Check refrigerant piping for
clogging.
Check operation of outdoor
fan (during heating).
Check for insufficiency in
refrigerant quantity.
There is more than one
Check indoor addresses.
outdoor unit in group.
Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.
There is duplication in line
Check line addresses.
address setting for outdoor
units belonging to different
refrigerant piping systems.
More than one indoor unit
Check display on priority
has been set up as priority
indoor unit.
indoor unit.
More than one indoor unit
Check displays on priority
have been set up as priority
indoor unit and outdoor
indoor unit.
unit.
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Table of Contents
Troubleshooting
