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Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
• Check outdoor service
valves (gas side, liquid
side) to confirm full opening.
• Check outdoor PMVs
(PMV1, 2, 4) for clogging.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for
leakage.
• Check SV4 circuit (for wiring
or installation error involving
SV41, SV42 and SV43).
I/F
—
Discharge
temperature
TD2 error
All stop
Discharge temperature
(TD2) exceeds 115 ˚C.
P17
P17
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check connection of fan
connector and wiring.
• Check for defect in fan
motor.
• Check for defect in indoor
P.C. board.
• Check impact of outside air
treatment (OA).
Indoor unit
—
Indoor fan
motor error
Stop of
corresponding unit
• Motor speed
measurements
continuously
deviate from target value.
• Overcurrent protection is
activated.
P12
—
• Check full-close operation
of outdoor PMV (1, 2, 4).
• Check for defect in Pd or
Ps sensor.
• Check gas balancing
circuit (SV2) for clogging.
• Check balance pipe.
• Check SV3B circuit for
clogging.
• Check defect in outdoor
P.C. board (I/F).
• Check capillary of oil
separator oil return circuit
for clogging.
• Check for leakage of check
valve in discharge pipe
convergent section.
I/F
—
Outdoor liquid
backflow
detection error
All stop
<During cooling operation>
When system is in cooling
operation, high pressure is
detected in follower unit that
has been turned off.
<During heating operation>
When system is in heating
operation, outdoor PMV 1 or
2 continuously registers
opening of 100p or less
while under SH control.
P13
P13
• Check for insufficiency in
refrigerant quantity.
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check PMVs (PMV1, 2) for
clogging.
• Check resistance
characteristics of TS1
sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for
leakage
I/F
01: TS condition
Gas
leakdetection
(TS1 condition)
All stop
Protective shutdown due to
sustained suction
temperature at or above
judgment criterion
for at least 10 minutes is
repeated four times or more.
<TS error judgment criterion>
In cooling operation: 60 ˚C
In heating operation: 40 ˚C
• Check for insufficiency in
refrigerant quantity.
• Check PMVs (PMV 1, 2)
for clogging.
• Check resistance
characteristics of TD1, TD2
and TD3 sensors.
• Check indoor filter for
clogging.
• Check piping for clogging.
• Check SV4 circuit (for
leakage or coil installation
error).
I/F
02: TD condition
Gas leak
detection
(TD condition)
All stop
Protective shutdown due to
sustained discharge
temperature (TD1, TD2 or
TD3) at or above 108 ˚C for
at least 10 minutes is
repeated four times or more.
P15
P15
Indoor unit (including Hot Water Module)
