Troubleshooting - Toshiba MCY-MUG0401HSW-E Installation Manual

12

Troubleshooting

In addition to the CODE No. on the remote controller of an indoor unit, you can diagnose failure type of an outdoor
unit by checking the 7-segment display on the interface P.C. board.
Use the function for various checks.
Set every dip switch to OFF after checking.
7-Segment display and check code
Rotary switch setting
value
Indication
SW01 SW02 SW03
1 1 1 Outdoor unit check code
* If a check code has an sub code, the display indicates the check code for three seconds and the sub code for
one second alternately.
Check code (indicated on the 7-segment display on the outdoor unit)
Indicated when SW01 = [1], SW02 = [1], and SW03 = [1].
Check code
Indication on 7-segment display on the outdoor unit
Sub code
E06 Number of indoor unit which received normally
E07 —
E08 Duplicated indoor addresses
E12 01 : Communication between indoor and outdoor
E15 —
00: Capacity over
E16
01 or more : No. of connected units
01: Other line outdoor connected
E20
02: Other line indoor connected
E31 IPDU quantity information
*1
80
F04 —
F06 —
F07 01: TL1 sensor
F08 —
F12 01: TS1 sensor
*
F13 1
F15 —
F16 —
F23 —
F24 —
F31 —
*
1
H01
1 *
H02
*
1
H03
H04 —
99-EN
7-segment D600 D601 D602 D603 D604
LED
[ U. 1 .E r r ] [ . ]
Display alternately every 2
seconds
Display contents
: Check code
: Sub code
Check code name
Decrease of number of indoor units
No indoor unit with a terminating resistor set
Indoor / Outdoor communication circuit trouble
Duplication of indoor addresses
Automatic address start trouble
No indoor unit during automatic address setting
Capacity over / Too many indoor units connected
Other line connected during automatic address setting
IPDU communication trouble
Communication trouble between MCU and sub MCU
TD sensor trouble
TE sensor trouble
TL1 sensor trouble
TO sensor trouble
TS1 sensor trouble
TH sensor (Board installed) trouble
Outdoor temp. sensor miswiring (TE, TL1)
Outdoor pressure sensor miswiring (Pd, Ps)
Ps sensor trouble
Pd sensor trouble
I/F EEPROM trouble
Compressor breakdown
Compressor trouble (Lock)
Current detective circuit system trouble
Compressor trouble (Overheat)
H06 —
*
1
H17
J30 Detected indoor addresses
L02 Detected indoor addresses
L04 —
L06 Number of indoor units with priority
L08 —
L10 —
L11 Detected indoor address
L13 Detected indoor address
L14 Detected indoor address
IPDU quantity information *
L29
1
L30 Detected indoor address
P03 —
1 *
P04
P05 00
*
1
* *
E ( : Fan motor number)
P07 —
P10 Detected indoor address
P11 —
P13 —
P14 01 : Outdoor unit service valve is close
01 : TS1 condition
P15
02 : TD condition
P19 —
P20 —
*
0 : Elemental device short
* 1 : Position detective circuit trouble
*
3 : Fan motor lock trouble
P22
*
4 : Motor current trouble
*
5 : Synchronize, step out trouble
*
( : Fan motor number)
*
P26 1
*
1
P29
*1 IPDU number information
01 : Compressor
08 : Fan
09 : Compressor and Fan
– 50 –
Low-pressure protective operation
Compressor trouble (Out of sync)
Refrigerant leak detection
Model mismatch of indoor and outdoor unit
Outdoor system address duplicated
Duplication of indoor units with priority
Indoor unit address / Group address unset
Outdoor unit capacity unset
Unsuitable safety device connected
Mismatch of safety device settings
Safety device nonconformity
IPDU quantity trouble
External interlock of indoor unit
Discharge temp TD trouble
High-pressure switch trouble
Power detection trouble
Compressor Vdc trouble
Fan motor Vdc trouble
Heat sink overheat trouble
Indoor overflow trouble
Outdoor unit heat exchanger freezing trouble
Outdoor unit liquid back detection trouble
Other refrigerant cycle protection
Gas leak detection
4-way valve operation trouble
High-pressure protective operation
Outdoor unit fan trouble
Compressor IPM short protection trouble
Compressor position detective circuit trouble
EN
100-EN