77
(
∗
1) All stop only in case of the header unit. The follower unit continues operation.
Check code
Wired
remote
controller
F15
F16
F22
F23
F24
F29
F31
H01
H02
H03
Outdoor 7-segment display
Check code
Auxiliary code
F15
—
F16
—
F22
—
F23
—
F24
—
—
—
F31
—
H01
01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
H02
01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
H03
01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
Detected
position
I/F
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
IPDU
IPDU
Check code name
Outdoor temp sensor
miscabling (TE1, TL)
Outdoor pressure sensor
miscabling (Pd, Ps)
TD3 sensor error
Ps sensor error
Pd sensor error
Indoor other error
Outdoor EEPROM error
Compressor breakdown
Compressor error (lock)
Current detection circuit
system error
Status
All stop
All stop
All stop
All stop
All stop
Corresponding
unit only stops.
All stop
(
∗
1)
All stop
All stop
All stop
Error detection condition
During operation of compressor in HEAT
mode, the TE1 detection temp was higher
than that of TL by the specified value
continued for 3 minutes or more.
High-pressure Pd sensor and low-pressure
Ps sensor were exchanged, or output
voltages of both sensors are zero.
Sensor resistance value is infinite or 0
(Open/Short)
Output voltage of Ps sensor was zero.
Output voltage of Pd sensor was zero.
(Sensor Open)
Pd > 4.15MPa during stop of compressor
Indoor P.C. board did not operate normally.
Outdoor P.C. board (I/F) did not operate
normally.
Inverter current detection circuit detected
over-current and stopped.
Over-current was detected several seconds
after header compressor had started.
While header compressor stopped, current
flowed more than the specified current and
was detected.
Check item (position)
• Check installation of TE1 sensor and TL sensor.
• Check characteristics of TE1 and TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of high-pressure Pd sensor connector.
• Check connection of low-pressure Ps sensor connector.
• Check pressure sensors Pd and Ps error.
• Check outdoor P.C. board (I/F) error.
• Check compression error of compressor.
• Check connection of TD3 sensor connector.
• Check resistance value characteristics of TD3.
• Check error of outdoor P.C. board (I/F).
• Misconnection of Ps sensor and Pd sensor connectors
• Check connection of Ps sensor connector.
• Check Ps sensor error.
• Check compression error of compressor.
• Check 4-way valve error.
• Check outdoor P.C. board (I/F) error.
• Check SV4 circuit error.
• Check connection of Pd sensor connector.
• Check Pd sensor error.
• Check outdoor P.C. board (I/F) error.
• Check indoor P.C. board error (EEPROM error).
• Check power voltage.
• Check power noise.
• Check outdoor P.C. board (I/F) error.
• Check power voltage. (AC380–415V ± 10%).
• Check compressor error.
• Check cause of abnormal overload operation.
• Check outdoor P.C. board (Comp. IPDU) error.
• Check compressor error.
• Check power voltage. (AC380–415V ±10%).
• Check cable of compressor and phase-missing.
• Check connector/terminal connection on IPDU P.C. board.
• Check conduction of case heater.
(Check activation error due to liquid stagnation in compressor.)
• Check outdoor P.C. board (Comp. IPDU) error.
• Check cabling of current detection circuit system.
• Check outdoor P.C. board (Comp. IPDU) error.
