Toshiba Super MMU-AP0091H Service Manual page 145

Check code
Main Outdoor 7-segment display
remote
Check code Sub-code
controller
P20 P20 —
P22 P22 0: IGBT shortage
1: Position detection
circuit error
3: Motor lock error
4: Motor current error
detection
C: TH sensor temp.
error
D: TH sensor error
E: Vdc error
Detected
Check code
AI-NET Status
position
name
central control
remote controller
22 I/F High-pressure All stop
protective
operation
1A FAN- Outdoor fan All stop
IPDU IPDU error
All stop
All stop
All stop
All stop
All stop
All stop
Error detection condition
Pd sensor detected 3.6MPa or more.
(Sub-code: 0)
• Short-circuit current was detected at start time.
• Short-circuit current was detected when checking
IGBT short-circuit before start time.
(Sub-code: 1)
• The standard value of detection circuit of fan IPDU
current fluctuated at start time.
(Sub-code: 3)
• Abnormal current was detected within 30 seconds
after start time.
(Sub-code: 4)
• Short-circuit current was detected when 2 seconds
or more passed after start time.
• Over-current was detected when 30 seconds or
more passed after start time.
(Sub-code: C)
• Heat sink sensor (TH) of fan IPDU detected 95°C
error.
(Sub-code: D)
• Heat sink sensor (TH) of fan IPDU detected short-
circuiting or open.
(Sub-code: E)
• nput power supply voltage of the fan IPDU over the
setup value was detected.
• Input power supply terminal of the fan IPDU was
unconnected.
• Power supply P .C. board error of the fan IPDU
Check item (position)
• Check Pd pressure sensor error.
• Check full opening of 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 air short-circuiting in outdoor unit.
• Check clogging of SV2 circuit.
• Check outdoor P .C. board (I/F) error.
• Check indoor fan system error.
(Cause of air volume decrease)
• Check valve opening of indoor PMV.
• Check miscabling of communication line between indoor
and outdoor.
• Check operation error of check valve of discharge pipe.
• Check circuit of gas balance SV4 valve.
• Check circuit of SV5 valve.
• Check refrigerant overcharge.
• Check fan motor. (Interphase short-circuit)
• Check fan IPDU error.
• Check fan IPDU error.
• Check fan motor. (Lock, phase missing)
• Check cause of abnormal overload at start time.
• Check connection of connector to fan motor.
• Check power supply voltage.
• Check fan IPDU error.
• Check outdoor fan system.
• Check fan IPDU error.
• Check fixation between fan IPDU and heat sink.
• Check fan IPDU error.
• Check input power supply voltage of the fan IPDU.
• Check power supply P .C. board error of the fan IPDU.
• Check error of external electrolytic condenser.