Toshiba MMK-AP0074MH-E Service Manual page 59

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