121
Check code
Outdoor 7-segment display
Wired
remote
controller Check code
Auxiliary code
AI-NET
central control
remote controller
Detected
position
Check code name
Status
Error detection
condition
Check item (position)
L29
L29
01: Comp IPDU error
02: Fan 1 IPDU error
03: Comp + Fan 1 IPDU error
04: Fan 2 IPDU error
05: Comp + Fan 2 IPDU error
06: Fan 1 + Fan 2 IPDU error
07: All IPDU error or communication error
between IPDU and I/F P.C. board, or
outdoor I/F P.C. board error
CF
I/F
IPDU quantity error
All stop
No. of IPDU units
detected when power
was turned on were
less.
• Check model setup for outdoor I/F service P.C. board.
• Check connection of UART communication connector.
• Check IPDU, fan IPDU, and I/F P.C. board error.
Note)
UART: Universal Asynchronous Receiver Transmitter
L30
L30
Detected indoor address
b6
Indoor
Interlock in indoor unit from
outside
Corresponding
unit only stops.
• Outside error input
terminal
Detected signal to
(CN80) for more than
1 minute
n
Outside device is connected to connector (CN80):
1) Check outside device error.
2) Check indoor P.C. board error.
n
Outside device is not connected to connector (CN80):
1) Check indoor P.C. board error.
—
L31
—
—
I/F
Extended IC (Integrated
Circuit) error
Operation
continues.
P.C. board (I/F) parts
error
Check indoor (I/F) P.C. board.
P01
—
—
11
Indoor
Indoor fan motor error
Corresponding
unit only stops.
• Check the lock of fan motor (AC fan).
• Check cabling.
P03
P03
—
1E
I/F
Discharge temp TD1 error
All stop
Discharge temp (TD1)
exceeded 115°C.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV.
• 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 SV4)
• Check leakage of SV5 circuit.
P04
P04
01: Compressor 1
21
I/F
Actuation of high-pressure
SW
All stop
High-pressure SW
actuated.
• 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.
• 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.
P07
P07
01: Compressor 1
1C
IPDU
I/F
Heat sink overheat error
All stop
IGBT built-in temp
sensor (TH) was
overheated.
• 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).