Toshiba MMY-MUP0801HT7JP, Service Manual

Page: 206 / 309

Ye
s
No
Ye
s
No
* 380
-415
V ± 10%
Ye
s
No
Ye
s
No
Ye
s
[H01] [H17]
Cause
Check code
Check code name
Is power voltage
of outdoor unit
normal?
Is voltage normal
when other compressor
starts?
Is winding
resistance between
phases of corresponding
compressor normal?
(Note 1)
Is compressor
an abnormal overload?
Is
connection of
wiring or connection of
connector on
compressor
P
.C. board normal?
Correct power line. Correct connector connection or wiring. Correct cause of overload. Replace compressor.
Check compressor P
.C. board.
Compressor breakdown Rotor- stop power distribution has occurred. Judged that the synchronization could not be taken.
1.
Outdoor unit power line trouble
2.
Compressor circuit system trouble
3. Compressor
trouble
4.
Abnormal overload in operation
5. Compressor
P
.C.
board
trouble
Sub-code:
1
∗
: Compressor 1,
2
∗
: Compressor 2
No
T
ake of
f lead wire of compressor P. C. board.
1.
Check resistance between windings: It is normal if there are 0.1
Ω
to
0.4
Ω
.
2.
Check insulation between outdoor cabinet and terminal:
It is normal if there are 10MΩ
or more.
%0
%
%0
(
(
&$
+%
%0
%0
.
%0
%0
%0
%
%
%
%
%0
%0
6
%0
%0
+%
%0
%0
%
4'
#%
614
%
6
6
6
%
%
%0
,
,
,
%0
%0
4'
#%
61
4
W : BLACK lead wire(CN
203
)
V : WHITE lead wire(CN
202
)
U : RED lead wire(CN
201
)
Ye
s
Ye
s
No No *1: 380
-415
V ± 10%
Ye
s
No
No
No
Ye
s
No
Ye
s
No
Ye
s
Ye
s
[H02]
Cause
Check code
Check code name
Compressor trouble (Lock)
1.
Outdoor unit power line trouble
2.
Compressor circuit system trouble
3. Compressor
trouble
4.
Refrigerant stagnation in compressor shell
5. Compressor
P
.C.
board
trouble
6. MG-CTT
trouble
Sub-code:
1
∗
: Compressor 1,
2
∗
: Compressor 2
Is power voltage
of outdoor unit
normal? *1
Is voltage normal
when other compressor
starts?
Is wiring
or connector
connection on Compressor
P
.C. board
normal?
Is MG-CTT
normal? *2
Is there
refrigerant stagnation
in compressor shell?
Is compressor
normal? *3
Is case heater output
normal?
Correct power line. Correct connector connection or wiring.
Replace
MG-CTT
No
Ye
s
Is compressor an
abnormal overload?
Correct cause of overload. Correct refrigerant stagnation in compressor shell.
Check case heater
.
Operation starts.
Replace compressor.
Replace compressor P.C. board.
*3 Check the following items mainly
.
1. Existence of abnormal sound and abnormal
vibration during operation or starting
2.
Abnormal overheat of case during operation or
stop time (Never touch with hands.)
3. Current of compressor lead during operation or
starting time (No sudden change of current?)
2 Check connection wiring *
Check operation of MG-CTT Check the short circuit of MG-CTT
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