Sharp AE-X095E - Page 31

BREAK DOWN DIAGNOSIS PROCEDURE
Self-diagnostic procedure using dispiay mode
If the timer larnp blinks during operation, the problem can be diagnosed using the following table.
To run a diagnosis, stop operamove controller and then hold down ae "AUX" button for at least 5 sec.
Overheat of the compressor
error
(protector operating) or
outdoor compressor
AH-X07SE/X095E AH-XO7SE/X09SE
AU-X07SE/X095E AU-X075E/X095E
AY-XO7S5E/X095E AY-X075E/X095E
AE-X075E/X09SE AE-X07SE/X095E
@ : Blinks at 2-second intervals O
x : OFF
1. Is the discharge outlet of the outdoor unit clogged ?
2. Is the power supply voltage at least 198 V at full power operation ?
3. Check for refrigerant leaks at the tubing connections.
4. Measure the resistance of compressor thermistor TH1 on the
:ON
© : Blinks 3 times at 0.2-second intervals
1. Apply an external shock to the
compressor.
2. Replace the compressor.
1. Clear the discharge outlet.
2. Assure power supply voltage.
3. Refill to rated amount.
4. Replace the outdoor thermistor
x x x
=
5
s
3S
re)
3
a
S
3
&
completely stopped
x x
completely stopped indoor unit Outdoor unit
operating
thermistor TH1 short outdoor unit (see Figure 2).
assembly.
5. Measure the resistance of heat exchanger pipe thermistor TH2 on the |5. Replace the indoor control board
indoor unit (see Figure 1).
assembly or only TH2.
O PAs <oanee 3times | DC overcurrent error 1. Check the circuit in the Power transistor module: 1. Replace power transistor module
2. Is the outdoor fan revolving ?
Beka 4times | Short circuit of the thermistor | 1. Measure the resistance of thermistor TH2 on the outdoor unit 1. Replace the outdoor thermistor
error (see Figure 2). assembly.
x x O x O © Stimes | Open circuit of the thermistor | 1. Are the connectors of the outdoor unit thermistors well attached 7 1. Reattach.
error 2. Measure the resistance of thermistors TH1 and TH2 on the outdoor 2. Replace the outdoor thermistor
unit (see Figure 2). assembly.
© 6times | AC abnormal current error 1. Can voltage be detected at the current transformer on the outdoor unit | 1. Replace the outdoor contro! board
control board? assembly.
(Current transformer wire break.)
1. Is the discharge outlet of the outdoor unit clogged ? 1. Clear the discharge outlet.
indoor unit (see Figure 1).
2. Does the four-way valve relay operate properly ?
3. Does the four-way valve operate properly 7
1. a the fan motor locked ?
2. Is the wiring connector firmly fitted ?
3. Is the speed signal applied to the motor ?
Indoor fan out of order
1. Replace the indoor control board
assembly or only TH2.
2. Replace the outdoor control board
assembly.
3. Replace the four-way valve.
1. Reones fan motor
2. Reattach.
3. Replace the inddor control board
assembl
CO [Serial shor 7. Check the wirng between uni.
[© _____|Serial open | 1. Check the wiring between units.
Outdoor power supply does't | 1. Check the wiring between units.
turn on. 2. Check the fuse in the outdoor unit.
Wiring mistake. 3. Indoor control board.
4. Outdoor control board.
Note: 1. Hold down the "AUX" button for 5 sec. when operation is stopped to read the self-diagnostic memory.
Normal : Only the timer lamp blinks. Error : Displayed by blinking of run lamp (above table).
2. If the power plug is removed from the outlet or the breaker is switched to "OFF", the self-diagnostic memory will be erased.
3. Example of outdoor unit LED 1 blinking : 1
CN
time
6 0.
Isec..! sec | sec. | sec. |sec. |sec. | sec. | sec. [sec. |sec.
2 times
ON
Compressor lock OFF
ON
Overheat of the compressor OFF
Figure 1 Temperature properties of indoor thermistors
Ka
100 -
Thermistor | Signal | Color
Room temperature | CN4 | Yellow
TH2-1
Heat exchange TH3-4 | Orange
To measure the resistance, first remove
the soldering as shown at right.
80 ~
60
Heat exchange thennistor
TH2 (orange)
25°C resistance 15 KN
Resistance
40 4
Room temperature
thermistor TH1 (yellow)
20 ~ 25°C resistance 10 KO
o- T T mats T T
“10 oO 10 20 30 40
cna?
Room temperature
thermistor TH1
ooj2
°
Tester
31
Heat exchange
thermistor TH2
Tester
. 1 1
|sec. | sec. | sec. | sec. | sec. | sec. lsec. | sec. | sec. | sec. | sec. | sec. |sec. |sec.
Figure 2 Temperature properties of outdoor thermistors TH2 heat exchange thennistor
sistance (1)
TH1 compressor thermistor
a 20K
8 x
| 10K:
rat
20 40 60
i—
-20 0
—— Temperature (°C)
Tester
8 aA
— Resistance (1)
yo + Qa 8 3
A RK
Themnistor To measure the
100K
No.
|
Connector
|
Color
:
ressor
resistance,
first
2
praelaiehrers
TH1|
No.
1
to2
|
Black
|
remove
the
-20
0
20 60
80
100
120
oe
from
the
—— Temperature (°C)
Heat exchanger|
1. Rewire.
2. Replace the fuse, replace the
outdoor board assembly.
3. Replace the board
4. Replace the board
Cautions when attaching or removing the board
¢Use radio pliers to remove and insert the choke coil. Be careful
not to cut your hand on the shield.
When operating only the outdoor unit (cooling 40 Hz fixed mode)
To make only the outdoor unit run in cooling mode, short the
places marked with arrows below with an adaptor, ‘and apply a
voltage of 220 - 240 V AC to 1 and N on the terminal board.
(Avoid operating the outdoor unit alone for long periods of time.)
Adaptor
5 Adaptor
2 (R34)
:
Microcomputer | input = ©) (GND)
terminal signal
| Pin no. 59 _|
Ove Low input
a wo High input Outdoor control board —__
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