Troubleshooting - Toshiba MCY-MAP0401HT Installation Manual

10

Troubleshooting

In addition to the check code on the remote controller of the indoor unit, a trouble of the outdoor unit can be
diagnosed by 7-segment display of the control P.C. board of the outdoor unit. Make good use of this function for
various checks. After check, return each bit of Dip switch to OFF position.
▼ Segment display and check code
Rotary switch setup value
Displayed contents
SW01 SW02 SW03
1 1 1 Check code of outdoor unit
* However, when there is an auxiliary code, the check code (for 3 seconds) and the auxiliary code (for 1 second)
are alternately displayed.
Check Code (Outdoor 7-segment display [B])
Displayed when SW01: 1, SW02: 1, SW03: 1
Check code
Outdoor 7-segment display
E06 Number of indoor unit which received normally
E07
E08 Duplicated indoor addresses
01: Communication between indoor and outdoor
E12
02: Communication between outdoor units
E15
E16 00: Capacity over 01~: No. of connected units
00: Header is nothing
E19
02: Two or more header units
01: Other system outdoor connected
E20
02: Other system indoor connected
E31 IPDU quantity information
F04
F06
F07
F08
F12 01: TS1 sensor error
F13 01: Compressor 1
F15
F16
F23
F24
F31
45-EN
LED
D600 D601 D602 D603 D604
A
A Outdoor unit No. (U1 only)
B Check code display*
Auxiliary code Check code name
Decrease of number of indoor units
— Indoor / Outdoor communication circuit error
Duplication of indoor addresses
Automatic address start error
Indoor is nothing during automatic
—
addressing
Capacity over / Number of connected
indoor units
Number of header outdoor units error
Other refrigerant system connected during
automatic addressing
IPDU communication error
— TD1 sensor error
— TE1 sensor error
— TL sensor error
— TO sensor error
TS1 sensor error
TH sensor error
— Outdoor temp. sensor miswiring (TE, TL)
— Outdoor pressure sensor miswiring (Pd, Ps)
— Ps sensor error
— Pd sensor error
— Outdoor EEPROM error
– 23 –
Check code
Outdoor 7-segment display
H01
H02
H03
H04
H06
L04
L06
B
L08
L10
L18
L29
L30
L31
P03
P04
P07
P10
P13
P15
P19
P20
P22
P26
P29
Auxiliary code
01: Compressor 1 Compressor breakdown
Magnet switch error
01: Compressor 1 Over-current relay operation
Compressor trouble (Lock)
01: Compressor 1 Current detective circuit system error
— Compressor 1 case thermo operation
— Low-pressure protective operation
— Outdoor line address duplicated
Number of indoor units with priority Duplication of indoor units with priority
— Indoor group / Address unset
— Outdoor capacity unset
Detected indoor address Flow selector unit error
IPDU quantity information IPDU quantity error
Detected indoor address External interlock of indoor unit
— Extended I/C error
— Discharge temp TD1 error
01: Compressor 1 High-pressure SW system operation
01: Compressor 1 Heat sink overheat error
Detected indoor address Indoor overflow error
— Outdoor liquid back detection error
01: TS condition 02: TD condition Gas leak detection
Detected outdoor unit number 4-way valve inverse error
— High-pressure protective operation
* A : Fan motor circuit error
Outdoor fan IPDU error
* d : Fan motor lock
01: Compressor 1 IGBT short protection error
Compressor position detective circuit
01: Compressor 1
system error
Check code name
46-EN