– 84 –
FILE NO. SVM-12051
(3) Check procedures
Table 11-9-1
No.
1
2
3
4
5
6
7
Pr
ocedure
Turn off the power supply breaker
and remo
ve the P.C. board
assemb
ly from electronic parts
base
. Remove the connecting
cab
les from the terminal block.
Remove the connector of the
motor and tur
n on the power
supply break
er. If OPERATION
indicator flashes (once per
second), it is not necessar
y to
chec
k steps (1 to 3) in the right
ne
xt column.
Push [ ] button once
to star
t the unit. (Do not set the
mode to On-Timer oper
ation.)
Shorten the restart delay timer
and star
t unit.
Push [START/STOP] button once
to star
t the unit,
• Shorten the restart delay timer.
• Set the operation mode to
COOL.
• Set the fan speed level to
AU
TO.
• Set the preset temperature
m
uch lower than the room
temperature
. (The unit (com-
pressor) operates contin
uously
in the abo
ve condition.)
If the above condition (No. 5) still
contin
ues, start the unit in the
f
ollowing condition.
• Set the oper
ation mode to
HEA
T.
• Set the preset temperature
m
uch higher than room tem-
per
ature.
Connect the motor connector to
the motor and tur
n on the power
supply
.
Star
t the unit the following
condition.
• Set the f
an speed level to HIGH.
(The unit (compressor) oper
ates
continuously in the abo
ve
condition in No
. 5.)
Chec
k points
Check whether or not the fuse (F01)
is b
lown.
Check power supply voltage :
1.
Between No. 1 and No. 3 of CN23
(AC 220–240V)
2. Between and of C03
(DC 310–340V)
3. Between of C10 and output
side of IC08 (DC 15V)
4.
Between 12V and GND
5. Between 5V and GND
Check power supply voltage :
1.
Between CN
51 and
No. 1 of CN01 (DC 15–60V)
Check whether or not all indicators
(OPERATION, TIMER,
FILTER, PURE
and HI POWER
) are lit for 3 seconds
and they
return to normal 3 seconds later.
1. Check whether or not the com-
pressor oper
ates.
2. Check whether or not the
OP
ERATION indicator flashes.
1. Check whether or not the com-
pressor oper
ates.
2.
Check whether or not the OP-
ERA
TION indicator flashes.
1. Check it is impossible to detect
the v
oltage (DC 15V) between 3
and 4 of the motor ter
minals.
2.
The motor does not operate or
the f
an motor does not rotate with
high speed.
(But it is possib
le to receive the
signal from the remote controller
.)
3.
The motor rotates but vibrates
strongly
.
Causes
Impulse voltage was applied or the
indoor f
an motor short-circuited.
1. The terminal block or the crossover
cab
le is connected wrongly.
2. The capacitor (C01), line filter
(L01), resistor (R0
2), or the diode
(DB01) is def
ective.
3.
IC
11, IC13 and T101
are defective.
4.
IC11, IC13 and T101
are defective.
5.
IC
11, IC13, IC14 and T101 are
def
ective.
IC51 and IC52 are defective.
The indicators are defective or the
housing assem
bly (CN21) is defective.
1. The temperature of the indoor heat
e
xchanger is extremely low.
2.
The connection of the heat ex-
changer sensor is loose
.
(The connector is disconnected.)
(CN
62)
3.
The heat exchanger sensor and the
P
.C. board are defective.
(Re
fer to Ta
b
le 11-4-1.)
4.
The main P.C. board is defective.
1. The temperature of the indoor heat
e
xchanger is extremely high.
2.
The connection of the heat ex-
changer sensor shor
t-circuited.
(CN
62)
3.
The heat exchanger sensor and the
P
.C. board are defective.
(Re
fer to Ta
b
le 11-4-1.)
4.
The main P.C. board is defective
1. The indoor fan motor is defective.
(Protected oper
ation of P.C. board.)
2.
The P.C. board is defective.
3. The connection of the motor
connector is loose
.
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