102
Check code
Main
remote
controller
P01
P03
P04
P05
P07
P10
P12
Outdoor 7-segment display
Check code
Auxiliary code
—
—
P03
—
P04
01: Compressor 1 side
02: Compressor 2 side
P05
01: Power supply open phase
02: Power supply negative phase
P07
01: Compressor 1 side
02: Compressor 2 side
P10
Indoor address with trouble
—
—
Detected
position
Indoor
I/F
I/F
I/F
IPDU
I/F
Indoor
Indoor
Check code name
Indoor fan motor error
Discharge temp TD1 error
Actuation of high-pressure
SW
Open phase negative phase
Heat sink overheat error
Indoor overflow error
Indoor fan motor error
Status
Corresponding
unit only stops.
All stop
All stop
All stop
All stop
All stop
Corresponding
unit only stops.
Error detection condition
Discharge temp (TD1) exceeded
115°C.
High-pressure SW actuated.
• Open phase was detected when
the power turned on.
• Negative phase was detected
when the power turned on.
IGBT built-in temp sensor (TH)
was overheated.
• Float switch operated.
• Float switch circuit disconnected
or the connector came off.
• The value of motor speed
deviated from target value was
detected for certain time.
• Over-current protection
operated.
Check item (position)
• Check the lock of fan motor (AC fan).
• Check cabling.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)
• Check connection of high-pressure SW connector.
• Check Pd pressure sensor error.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge air.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.
• Check outdoor power line.
• Check outdoor P.C. board (I/F) error.
• Check power voltage.
• Check outdoor fan system error.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink.
(Check screwing and contact.)
• Check IPDU error.(IGBT built-in temp sensor (TH) error).
• Check the float switch connector.
• Check operation of drain pump unit.
• Check the drain pump circuit.
• Check clogging of drain pipe.
• Check indoor P.C. board error.
• Check connection of fan connector and wiring.
• Check fan motor error.
• Check indoor P.C. board error.
• Check influence of outside air control.
