56
Check of LEV (Expansion valve)
Check of current limiting resistor
K
Outdoor unit does not operate at all or stops immediately due to over current.
Replace the power P.C. board.
When the current-limiting resistor is open, the rush current limiting relay may not work properly.
Does current limiting resistor (R64) detect 10
"
?
No
∞
Yes
OK
Start
L
(Only SLZ-A09AR.TH, SLZ-A12AR.TH) Heating/Cooling does not operate.
Replace the LEV.
With remote controller set toward the indoor unit, press
the OPERATE/ STOP(ON/ OFF) button and confirm one
beep tone.
LEV operates in full-opening
direction.
Is LEV properly fixed to the
expansion valve?
Ok
Do you hear the expansion
valve "click, click·······"?
Do you feel the expansion
valve vibrate on touching it ?
Does the resistance of LEV
have the characterictics on
page 50?
Measure each voltage between connector pins
of CN724 on the inverter P.C. board.
1.Pin
3
(-) Pin
1
(+)
2.Pin
4
(-) Pin
1
(+)
3.Pin
5
(-) Pin
1
(+)
4.Pin
6
(-) Pin
1
(+)
Is there about 3~5V AC between each?
NOTE: Measure the voltage by an analog tester.
No
Yes
Yes
Yes
No
Replace the
expansion valve.
Yes
No
No
Properly fix the LEV to the
expansion valve.
Replace the
inverter P.C. board.
NOTE : After check of LEV, do the undermentioned
operations.
1. Turn OFF the power supply and
turn ON again.
2. Press the RESET button on the remote
controller.
Turn ON the power supply.
1
During pressing both the OPERATION SELECT
button and the TOO COOL button on the remote
controller, press the RESET button.
2
First, release the RESET button.
(After 3 seconds, confirm all displays of the remote
controller.)
3
Then release the OPERATION SELECT button and
the TOO COOL button.
1
During pressing both the OPERATION SELECT
button and the TOO COOL button on the
remote the controller, press the RESET button.
2
First, release the RESET button.
(After 3 seconds, confirm all displays of the
remote controller.)
3
Then release the OPERATION SELECT button
and the TOO COOL button.
ON/OFF
RESET
TOO
WARM
TOO
COOL
MODE
AUTO
COOL
DRY
HEAT
FAN
VANE
SELECT
TIME
ON/OFF
TOO
WARM
TOO
COOL
h
Check of LEV (Expansion valve)
L
(Only SEZ-A09CR.W, SEZ-A12AR.TH) • When cooling, heat exchange of non-operating indoor unit frosts.
• When heating, non-operating indoor unit get warm.
Start
Replace the inverter P.C. board.
Replace the LEV coil.
Disconnect the connector
CN724 is there normal resistance to LEV coil?
Yes
Turn on power supply to the outdoor unit after checking LEV coil is mounted to
the LEV body securely.
No
Normal
Is "click - click" sound heard?
Or, do you feel vibration of the LEV coil with a hand?
Yes
No
[SUZ-A09VR.TH SUZ-A12VR.TH]
OC304A --2qxp 04.6.29 8:34 AM Page 56
