Mitsubishi Electric Mr.Slim PUHZ-SHW230YKA2, Service Manual

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38
OCH594B
* 1 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 is finished.
• Pipe temperature is less than or equal to 8
:
.
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.
Switch
Type
of
switch
DIP
switch
Push
switch
SW1
1
2
No.
Function Effective timing
Action by the switch operation
Manual 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
Note: Up to 6 refrigerant address can be assigned.
Under suspension
Test run mode setting Heating Cooling
No function — —
No function
— —
Setting of short pipe
connection
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.
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