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Switch
Type
of
switch
Dip
switch
Push
switch
SW1
1
2
No.
Function Effective timing
Action by the switch operation
Forced defrost
w
1 Start Normal
When compressor is working
in heating operation. w1
Abnormal history clear
Refrigerant address
setting
When power supply ON
Clear Normal Off or operating
SWP
6
5
4
3
Under suspension
Pump down Start Normal
SW4
SW8
1
2
1
2
3
Test run Operating OFF
Under suspension
Test run mode setting Heating Cooling
No function — —
No function
—
—
Separate indoor/outdoor
unit power supplies
Used Not used
—
—
When power supply ON
ON OFF
123
0123
456
ON
123456
ON
123456
ON
123456
ON
123
4567
456
ON
123456
ON
123456
ON
123456
ON
123
891011
456
ON
123456
ON
123456
ON
123456
ON
123
12 13 14 15
456
ON
123456
ON
123456
ON
123456
ON
w1 Forced defrost should be done as follows.
1Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2Forced defrost will start by the above operation 1 if all these conditions written below are satisfied.
· Heat mode setting
· 10 minutes have passed since compressor started operating or previous forced defrost finished.
· Pipe temperature is less than or equal to 8ºC[46ºF].
Forced defrost will finish if certain conditions are satisfied.
Forced defrost can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.
After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again. This
depends on the service conditions.
10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
OCH429--3.qxp 07.11.20 9:19 AM Page 71