Toshiba MCY-MHP0404HS8-E, Installation Manual

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Installation Manual
EN-73 EN-74
9
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
* If a check code has an auxiliary code, the display indicates the check code for three seconds and the auxiliary 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].
Rotary switch setting
value
Indication LED
SW01 SW02 SW03
1 1 1 Outdoor unit check code
A
Outdoor unit number
(U1)
B Check code display*
Check code
Check code name Indication on 7-segment display on the outdoor unit
Auxiliary code
E06 Number of indoor units which received normally Decrease of number of indoor units
E07 — Indoor / Outdoor communication circuit error
E08 Duplicated indoor addresses Duplication of indoor addresses
E15 — No indoor unit during automatic addressing
E16 00: Capacity over 01 or more: No. of connected units Number of connected capacity over / indoor units
E20
01: Other line outdoor connected
02: Other line indoor connected
Other line connected during automatic addressing
E31 IPDU quantity information*1 IPDU communication error
F04 — TD sensor error
F06 — TE sensor error
F07 — TL sensor error
F08 — TO sensor error
F12 — TS sensor error
F13 — TH sensor (Board installed) error
F15 — Outdoor temp. sensor miswiring (TE, TL)
F16 — Outdoor pressure sensor miswiring (Pd, Ps)
F23 — Ps sensor error
F24 — Pd sensor error
F31 — Outdoor EEPROM error
H01 — Compressor breakdown
D600
A B
D601 D602 D603 D604
H02 — Compressor trouble (Lock)
H03 — Current detective circuit system error
H06 — Low-pressure protective operation
L04 — Outdoor system address duplicated
L06 Number of indoor units with priority Duplication of indoor units with priority
L08 — Indoor group / Address unset
L10 — Outdoor capacity unset
L29 IPDU quantity information *1 IPDU quantity error
L30 Detected indoor unit address External interlock of indoor unit
P03 — Discharge temp TD error
P04 — High-pressure switch error
P05
00 Phase missing detection
*E (*: Fan motor number) Fan motor Vdc error
— Compressor Vdc error
P07 — Heat sink overheat error
P10 Detected indoor unit address Indoor overflow error
P13 — Outdoor liquid back detection error
P15 01: TS condition 02: TD condition Gas leak detection
P19 — 4-way valve operation error
P20 — High-pressure protective operation
P22
*0: Elemental device short
*1: Position detective circuit error
*2: Input current sensor error
*3: Fan motor lock error *4: Motor current error
*5: Synchronize, step out error
*C: Sensor temperature error (No TH sensor)
*D: Sensor short, free error (No TH sensor)
(*: Fan motor number)
Outdoor fan IPDU error
P26 — G-TR short protection error
P29 — Compressor position detective circuit system error
*1 IPDU number information
01: Compressor 02: Fan 1 03: Compressor and Fan 1
04: Fan 2 05: Compressor and Fan 2 06: Fan 1 and Fan 2
07: Compressor, Fan 1 and Fan 2 08: Fan 3 09: Compressor and Fan 3
0A: Fan 1 and Fan 3 0B: Compressor, Fan 1 and Fan 3 0C: Fan 2 and Fan 3
0D: Compressor, Fan 2 and Fan 3 0E: Fan 1, Fan 2 and Fan 3
0F: Compressor, Fan 1, Fan 2 and Fan 3
Check code
Check code name Indication on 7-segment display on the outdoor unit
Auxiliary code