Toshiba MMU-AP0121MH - Manual (Page 54)

54
(*1) All stop only in case of the header unit The follower unit continues operation.
Check code
Main
remote
controller
F13
F15
F16
F23
F24
F29
F31
H01
H02
Outdoor 7-segment display
Check code
F13
F15
F16
F23
F24
—
F31
H01
H02
Auxiliary code
01: Compressor 1 side
02: Compressor 2 side
—
—
—
—
—
—
01: Compressor 1 side
02: Compressor 2 side
01: Compressor 1 side
02: Compressor 2 side
Detected
position
IPDU
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
IPDU
Check code name
TH sensor error
Outdoor temp sensor
miscabling (TE1, TL)
Outdoor pressure sensor
miscabling (Pd, Ps)
Ps sensor error
Pd sensor error
Indoor other error
Outdoor EEPROM error
Compressor breakdown
Compressor error (lock)
MG-SW error
OCR operation
Status
All stop
All stop
All stop
All stop
All stop
Corresponding
unit only stops.
All stop (*1)
All stop
All stop
Error detection condition
• Resistance value of sensor is infinite or zero
(Open/Short).
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.
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.
Check item (position)
• IGBT built-in temp sensor error
→ Exchange IPDU P.C. board.
• 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.
• 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. (AC220–240V ± 10%).
• Check compressor error.
• Check cause of abnormal overload operation.
• Check outdoor P.C. board (IPDU) error.
• Check compressor error.
• Check power voltage. (AC380–10%, 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 (IPDU) error.
• Check outdoor MG-SW or OCR.
MG-SW : Magnet Switch, OCR : Over-current Relay