Function Of Switches - Mitsubishi Electric SUZ-KA24NAHZ Service Manual

10-9. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

Type
No.
Function
of Switch
switch
1
Manual defrost*
2
Abnormal history clear
3
4
SW1
DIP
Refrigerant address
switch
setting
5
6
1
Test run
SW4
2
Test run mode setting
1
Use of existing pipe
SW8 2
No function
Separate indoor/outdoor
3
unit power supplies
Push
Pump down
SWP
switch
*Manual defrost should be done as follows;
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Manual 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 manual defrost finished.
• Pipe temperature is less than or equal to 46ºF [8ºC].
Manual defrost will finish if certain conditions have been satisfied.
Manual defrost can be done if above conditions have been 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.
OCH754A
Action by the switch operation
ON
Start
Clear
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
0 1
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
4 5
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
8 9
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
12 13
Operating
Heating
Used
—
Used
Start
60
The black square (■) indicates a switch position.
OFF
Normal
Normal
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
2 3
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
6 7
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
10 11
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
14 15
OFF
Cooling
Not used
—
Not used
Normal
Continue to the next page.
Effective timing
When compressor is working
in heating operation.*
off or operating
When power supply ON
Under suspension
Always
—
When power supply ON
Under suspension