34
w
1 Forced defrost should be done as follows.
1
Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2
Forced 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 8
:
.
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.
Switch
Type
of
switch
Dip
switch
Push
switch
SW1
1
2
No.
Function
Effective timing
Action by the switch operation
Forced defrost
+
1
Start
Normal
When compressor is working
in heating operation.
+
1
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
*Up to 6 refrigerant address can be assigned.
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
1 2 3
0
1
2
3
4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3
4
5
4 5 6
ON
1 2 3 4 5 6
ON
8-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
Function of switches
The black square ( ) indicates a switch position.
OCH534
