Mitsubishi Electric PUHZ-SW40VHA, Service Manual

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42
10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
*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 compulsory defrosting 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.
*2 ‘Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON, ‘Auto recovery’ acti-
vates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW.
Please refer to the indoor unit installation manual.
*3 SW7-1 is setting change over of Demand/Low noise. It is effective only in case of external input.
(Local wiring is necessary. Refer to next page: Special function)
*4 Please do not use SW7-3 to SW7-6 usually. Trouble might be caused by the usage condition.
w
5 With this switch setting, the capacity decreases up to 30% under peak load condition. Thus this setting is recommended only for Air to
water purposes.
The black square ( ) indicates a switch position.
Type of
Switch
Swich No. Function
Action by the switch operation
Effective timing
ON OFF
Dip
switch
SW1
1 Forced defrost *1 Start Normal
When compressor is working
in heating operation. *1
2 Abnormal history clear Clear Normal OFF or operating
3
Refrigerant address setting
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
When power supply ON
4
5
6
SW4
1 Test run Operating OFF
Under suspension
2 Test run mode setting Heating Cooling
Push
switch
SWP Pump down Start Normal Under suspension
Dip
switch
SW5
1 No function — — —
2
Power failure
automatic recovery *2
Auto recovery No auto recovery When power supply ON
3,4,5 No function — — —
6 Model select Following SW5-6 reference
SW7
*4
1 Mode select *3 Demand function Low noise mode Always
2 No function — — —
3 Max Hz setting (cooling) Max Hz (cooling)
o
0.8 Normal Always
4 Max Hz setting (heating) Max Hz (heating)
o
0.8 Normal Always
5 Breaker capacity setting *5 16A 25A When power supply ON
6 Defrost setting For high humidity Normal Always
SW8
1 No function — — —
2 No function — — —
3 No function — — —
SW9
1 No function — — —
2 Function switch Valid Normal Always
3,4 No function — — —
SW6
1
Model select
1 2 3 6 4 7 8
OFF
ON
40
MODEL SW6
1 2 3 6 4 7 5 8
OFF
ON
50
5 1 2 3 4 5 6
OFF
ON
SW5-6
1 2 3 4 5 6
OFF
ON
The black square (
■
) indicates a switch position.
2
3
4
5
6
7
8
SW5 6
OCH525