78
TROUBLESHOOTING
9
1. Cautions on troubleshooting
(1) Before troubleshooting, check the followings:
1
Check the power supply voltage.
2
Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1
Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn
off the breaker.
2
When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
3
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
7. SERVICE FUNCTION
(1) AUTO RESTART FUNCTION
Operating the J2 Jumper line on the remote control Interface P.C.board of the indoor unit.
The function can set the auto restart function.
J2 = Auto restart
w
Auto restart setting on the shipping.
Cut J2 = no auto restart
(2) COMPULSORY DEFROSTING MODE FOR SERVICE
By short circuit of the connector JP607 and R853 on the deicer P.C. board of the outdoor unit, defrosting mode can be
accomplished regardless of the defrost interval restriction.
Defrost thermistor RT61 must be below -3
:
.
(3) DEFROST TERMINATION CHANGE
<JPC> when the JPC wire of the deicer P.C. board of the outdoor unit is cut, the defrost interval time will be changed.
<JPE> when the JPE wire of the deicer P.C. board of the outdoor unit is cut, the defrost temperature will be changed.
(4) 4 degrees up Function
Operating the J3 Jumper line on the remote control interface P.C.board of the indoor unit.
The function can set the 4 degrees up function.(See page 85.)
W
4 degrees up setting on the shipping.
J3 = 4 degrees up
Cut J3 = no 4 degrees up
Model names
Jumper wire
Change point
JPC
JPE
Defrost interval time changes from 40 minutes to 15minutes.
Defrost start temperature changes from
-3
:
to
0
:
.
Defrost finish temperature changes from
3.1
:
to
10.1
:
.
SUH-1.6VR
SUH-1.6VR2
SUH-2VR
SUH-2.5VR
OC281-B-3.qxp 04.2.10 2:23 PM Page 78