Mitsubishi Electric PUHZ-SW50VHA Service Manual Page 42
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- TROUBLESHOOTING
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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.
w5 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
123
012
3
456
ON
123456
ON
123456
ON
123456
ON
123
45
456
ON
123456
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
123 6478
OFF
ON
40
MODEL
SW6
123 64758
OFF
ON
50
5
123456
OFF
ON
SW5-6
123456
OFF
ON
The black square (■) indicates a switch position.
2
3
4
5
6
7
8
SW5 6
OCH525
- SERVICE MANUAL 1
- SAFETY PRECAUTION 2
- REFERENCE MANUAL 2
- [1] Cautions for service 3
- [3] Service tools 4
- Dimension A 5
- Dimension B 5
- 3 FEATURES 6
- 4 SPECIFICATIONS 6
- MICROPHONE 8
- 6 OUTLINES AND DIMENSIONS 9
- 7 WIRING DIAGRAM 10
- 8 WIRING SPECIFICATIONS 11
- 9 REFRIGERANT SYSTEM DIAGRAM 12
- 10 TROUBLESHOOTING 14
- 63HS) exceeds 70: 17
- •V•W phase) to 20
- SW40/50 63 61 60 58 56 53 50 23
- 10-4. TROUBLESHOOTING 24
- • Before repair 31
- Motor for compressor 34
- Linear expansion valve 34
- (LEV-A/ LEV-B) 34
- For SW40-50 34
- DC DC250~330V 35
- CC DC15V 35
- <Composition> 38
- (Voltage between pins 39
- (when stopped), DC 1– 39
- (when operated) 39
- → Transmitting signal 41
- Power consumption 43
- (SW1 on) 43
- Detailed 44
- The ones digit : Relay output 46
- SW2 setting 47
- Display detail 47
- Explanation for display 47
- Capacity Code 49
- SW50V 10 49
- Explanation for display Unit 52
- •The ones digit 53
- 11 DISASSEMBLY PROCEDURE 55
- OPERATING PROCEDURE PHOTOS 56
- Made in Japan 60
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