Skyworth SKVH09A-A3NAI, Руководство по обслуживанию

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33
Troubleshooting
Diagram 6 , 7, 8:
Main check points:
●Is the connection between control panel AP1 and compressor COM P secure? Loose? Is the connection in correct order?
●Is the voltage input of the machine within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT)
●Is the compressor coil resistance normal? Is the insulation of compressor coil against the copper tube in good condition?
●Is the working load of the machine too high? Is the radiation good?
●Is the charge volume of refrigerant correct?
Fault diagnosis process:
Energize an d
s wit ch on
IPM protection
occurs after the
machine has run for
a pe riod of time ?
Use AC voltmeter
to measure the
voltage b e tw een
terminal L and N
on the wiring
board XT)
If the voltage
between terminal L
and N on wiring board XT
is within 210VAC ~
250VAC?
Check the supply
v o l t age and
restore it t o
210VAC~250V A C
V o l t age betwee n
the two ends o f ce l ect roly tic
capacito r is
R estart the unit. Be fore
protection occurs ,
use DC voltmeter t o
measu r e the vol t age
b et we en the t w o
ends of electrolyti c
capacito r on cont rol
panel AP1
If the unit can
wor k norm a lly?
Please confirm:
1. If the indoor and
out door hea t
exchangers are
dirty? If they are
obstructed by other
obj ects w hich a ffec t
the heat exchan ge
of indoor an d
outd oor unit.
2. If the indoor and
out door fans are
w o r kin g normally?
3. If the environment
temperature is too
high , re s ulting in
that the syste m
pressure is too high
and exceeds the
permis s ible r an ge?
4. If the charge volume
of refrigerant is too
much, resulting i n
that the syste m
pressur e is t oo high?
5. Other condition s
resulting in that the
sy stem p ress u r e
becomes too hig h.
The connection
of capa citor C2
is loose.
Reconnect the
capac itor C2 ac cordi n g
to El ect ri c al Wi ring
Dia gra m. Th en,
Restart t he
unit.
Stop the unit and
disconnect the power
supp ly. Wait 20 minutes ,
or use DC voltmeter t o
measure the voltage
between the two ends of
capacit or C2 , un til the
v o l t age is lower than 20V
Replace the capacitor
C2. Then, energize
and sta rt the unit.
Replace the
control pan el AP1
T a ke corrective actions
according to T e chnical
Service Manual, and
then ene rgiz e and sta r t
the unit.
If there is any
abnormality
desc ribed above?
Replace the
control pan el AP1
If the connection
between AP1 and
CO MP is unsecu re
or the connectio n
order is wrong?
Connect the control pa nel
AP1 and comp r esso r
COMP correctly according
to the El ec tr ic al Wi ri n g
Diagra m. Then, energiz e
and st art the uni t.
Use ohmmeter t o
measu r e th e r esistance
between the three terminals
on com press o r COM P, and
compare the measuremen ts
with the compressor
resis t ance on Service Manual .
If the
resistance i s
normal?
Use ohmmeter t o
measu r e the r esistance
between the two terminals
of compressor COM P and
Replace the
compressor
COM P
Resistance higher
than 500MΩ?
Replace the
control pan el
AP1
END
Y
N
Y
N
Y
N
Y
If the unit can
work normallv?
Y
Y
Y
If the unit can
work normally?
No
N
Y
N
If the unit can
work no r ma lly?
Y
N
N
If the unit can
wor k
normally?
Y
Y
N
Y
N
N
Y
higher tha n
250V
Rem ove the wir es
on the two ends of
capacitor C2. Then,
use capacitance
meter to measure
the capacitor C2.
V e rify as per the
Parameters Shee t.
Stop the unit and
disconnect the power
supply . T hen, check
the connection of
capacitor C2
according to Electrical
Wiring Diagram.
If capacitor
C2 is failed?
Refer to the
Electrical Wiring
Diagram and che ck
if the connection
between AP1 and
COM P is loose and if
the connection ord e r
is correct.
copper tub e.