81
Check code
Wired
remote
controller
P01
P03
P04
P05
P07
P10
P12
Detected
position
Indoor
I/F
I/F
I/F
IPDU
I/F
Indoor
Indoor
Outdoor 7-segment display
Check code
Auxiliary code
—
—
P03
—
P04
01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
P05
00:
01: Compressor 1
02: Compressor 2
03: Compressor 3
P07
01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
P10
Indoor address with
trouble
—
—
Check code name
Indoor fan motor error
Discharge temp TD1 error
Actuation of high-pressure
SW
Open phase shortage/phase
sequence detection
Inverter DC voltage (Vdc)
error (Compressor)
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.
• Overvoltage/Volt shortage was
detected in inverter DC voltage
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, 4)
• 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, SV42 and SV43)
• 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 miswiring 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 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.
