Function Of Switches; Normal - Mitsubishi Electric Mr.SLIM PU-P71VHA Service Manual

11-10. FUNCTION OF SWITCHS, CONNECTORS AND JUMPERS

Function of switches

Switch
Function
Signal No.
SW1 1
Compulsory defrosting
2
Abnormal history clear
3
Refrigerant address setting
6
SW4 1
Test run ON/OFF
2
Test run mode setting
SW5 1
Fan 100% fix
2
Outdoor LEV opening fix
3
No function
4
Length of defrost operation
1 Compulsory defrosting should be done as follows.
1Change the DIP SW1-1 in the outdoor controller board OFF→ON (compulsory defrosting start).
According to the 1 operation,
• Heat mode setting
• When the stated condition is satisfied, the defrosting operation will be completed.
2 Ignore the change of LEV opening, which is subject to change of subcooling, and fix DIP SW 5-2 in the on position. Then
LEV opening is fixed. When air conditioner is overloaded for some reasons, ignore the change of subcooling and adjust the
LEV opening in accordance with overload condition.
OC379F
Action by the switch operation
ON
1 Start
Clear
ON
1 2 3 4 5 6
0
ON
1 2 3 4 5 6
4
ON
1 2 3 4 5 6
8
ON
1 2 3 4 5 6
12
ON
Heat
100% fix
2 Fix
No function
20 minutes
• Compressor operating
OFF

Normal

Normal
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
1 2
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
5 6
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
9 10
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
13 14
OFF
Cool
Normal
Normal
No function
15 minutes (Normal)
• The defrosting starts when the piping temperature is 8˚C and below.
56
Effective timing
Heat compressor operating
off or operating
ON
1 2 3 4 5 6
3
ON
When power supply ON
1 2 3 4 5 6
7
ON
1 2 3 4 5 6
11
ON
1 2 3 4 5 6
15
off or operating
off or operating
Always
OFF
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