132

 

 

Check code

 

 

 

 

 

 

 

 

 

 

 

 

 

Detected

Check code

Status

Error detection condition

 

Check item (position)

Main

Outdoor 7-segment display

 

AI-NET

 

 

position

name

 

remote

 

 

 

central control

 

 

 

 

controller

Check code

Sub-code

 

remote controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P01

11

Indoor

Indoor fan

Corresponding

 

Check the lock of fan motor (AC fan).

 

 

 

 

 

 

motor error

unit only stops.

 

Check cabling.

 

 

 

 

 

 

 

 

 

 

 

P03

P03

 

1E

I/F

Discharge

All stop

Discharge temp (TD1)

Check full opening of outdoor service valves (Gas side, Liquid side).

 

 

 

 

 

 

temp TD1

 

exceeded 115°C.

• Check clogging of outdoor PMV. (PMV1,2)

 

 

 

 

 

 

error

 

 

Check characteristics of TD1 sensor resistance value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check refrigerant shortage.

 

 

 

 

 

 

 

 

 

Check 4-way valve error.

 

 

 

 

 

 

 

 

 

Check leakage of SV41 circuit.

 

 

 

 

 

 

 

 

 

Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)

 

 

 

 

 

 

 

 

 

Check leakage of SV5 circuit.

 

 

 

 

 

 

 

 

 

Check leakage of SV6 circuit. (Capillary clogging, valve operation error)

 

 

 

 

 

 

 

 

 

Check mispiping of discharge gas/suction gas main pipe.

 

 

 

 

 

 

 

 

 

Check Flow selector unit.

 

 

 

 

 

 

 

 

 

 

Check leakage of SVD valve and SVS valve.

 

 

 

 

 

 

 

 

 

 

(Check leakage of SVDD valve and SVSS.)

 

 

 

 

 

 

 

 

 

 

Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring

 

 

 

 

 

 

 

 

 

 

between FS unit and indoor unit, and connection of connectors.

 

 

 

 

 

 

 

 

 

 

Check miswiring of SVS/SVD valves.

 

 

 

 

 

 

 

 

 

 

 

P04

P04

01: Compressor 1 side

21

I/F

Actuation of

All stop

High-pressure SW actuated.

Check Pd pressure sensor error.

 

 

02: Compressor 2 side

 

 

 

high-pressure

 

 

Check full opening of outdoor service valves (Gas side, Liquid side).

 

 

 

 

 

 

SW

 

 

Check outdoor fan error.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check outdoor fan motor error.

 

 

 

 

 

 

 

 

 

Check clogging of outdoor PMV. (PMV1,2)

 

 

 

 

 

 

 

 

 

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.

 

 

 

 

 

 

 

 

 

Check mispiping of discharge gas/suction gas main pipe.

 

 

 

 

 

 

 

 

 

Check circuit clogging at auxiliary heat exchanger side. (PMV3, SV12, check valve)

 

 

 

 

 

 

 

 

 

Check FS unit.

 

 

 

 

 

 

 

 

 

 

Check clogging of SVD valve and operation error.

 

 

 

 

 

 

 

 

 

 

Check wiring inside of FS unit. (SVD/SVS coil miswiring, etc.)

 

 

 

 

 

 

 

 

 

 

Check wiring between FS unit and indoor unit.

 

 

 

 

 

 

 

 

 

 

(Miswiring, Disconnection, Wiring missing)

 

 

 

 

 

 

 

 

 

 

P05

P05

01: Power supply

 

AF

I/F

Phase missing

All stop

• Missing phase was detected

• Check outdoor power line.

 

 

missing phase

 

 

 

or reversed

 

when the power turned on.

• Check outdoor P.C. board (I/F) error.

 

 

02: Power supply

 

 

 

phase order

 

• Reversed phase was

 

 

 

 

phase order

 

 

 

 

 

detected when the power

 

 

 

 

(reversed phase)

 

 

 

 

 

turned on.

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 132
Image 132
Toshiba MMU-AP0091H service manual 132, Name