Mitsubishi MXZ-2A52VA Service Manual Page 119
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- Table of contents
- TROUBLESHOOTING
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119
12-5. INCREASING MAXIMUM COMPRESSOR OPERATIONAL FREQUENCY AND FAN SPEED OF THE
OUTDOOR UNIT
<MXZ-4A80VA-
E2
, MXZ-5A100VA>
12-6. CHANGING DEFROST FINISH TEMPERATURE AND HEAT OPERATION TIME
<MXZ-4A80VA-
E2
, MXZ-5A100VA>
Compressor operational frequency and fan speed can be increased.
Capacity of the unit can be improved with this function.
NOTE:
Compressor operational frequency may not be increased under primary current restriction or high pressure protection.
Compressor operational frequency will not be increased when 1 or 2 indoor units are operating.
This function doesn't work when the function which lowers the operating noise of the outdoor unit is activated.
Noise level of the outdoor unit will increase (You may need to explain this to your customers.)
[How to increase maximum compressor operational frequency and fan speed]
Turn OFF the power supply for the air conditioner before making the setting.
Set the 3rd Dip Switch of SW2 on the outdoor electronic control P.C. board to ON to enable this function.
Turn ON the power supply for the air conditioner.
ON
SW2
123456
If defrosting operation starts more than necessary, the defrost finish temperature and heat operation time can be changed.
The number of defrosting operation and defrosting time can be reduced with this function.
[How to change defrost finish temperature and heat operation time]
Turn OFF the power supply for the air conditioner before making the setting.
Set the 1st Dip Switch of SW2 on the outdoor electronic control P.C. board to ON to enable this function.
Turn ON the power supply for the air conditioner.
ON
SW2
123456
Defrost finish temperature (°C)
Heat operation time (min.)
Initial setting
10
31
Changed
5
40
The record of auto line correcting can be confirmed in the following way:
Press the switch for more than 5 sec.
LED will show the record of auto correcting for about 30 sec. as shown in the table below:
NOTE: Activate this function to confirm the correct wiring after replacing the electronic control P.C. board.
(Previous records are deleted when the electronic control P.C. board is replaced.)
The record cannot be shown if auto line correcting is not canceled (Refer to "How to activate this function").
LED1(Red)
Once
3 times
LED2(Yellow)
Once
3 times
LED3(Green)
Lighting
Lighting
Not corrected
Corrected
Number of blinks
Wiring line
12-7. CHANGING THE AMPERE LIMIT
<MXZ-4A80VA-
E2
, MXZ-5A100VA>
With this function, you can change the current that flows in the
outdoor unit.
[How to change the ampere limit]
Be sure to turn OFF the power supply for the air conditioner
before making the setting.
Make the setting referring to the table on the right.
Turn ON the power supply for the air conditioner.
NOTE:
Use this function only when the amount of current exceeds
the allowed value.
SW 2
MXZ-5A100VA
MXZ-4A80VA -
E2
ON
10.5A
ON
15.5A
ON
Initial setting
Full
- SERVICE MANUAL 1
- TECHNICAL CHANGES 2
- Description 6
- 3. Refrigeration oil 7
- 4. Air purge 7
- 5. Additional charge 7
- 2. Refrigerant piping 7
- PART NAMES AND FUNCTIONS 8
- Indoor units 10
- Indoor units combination 11
- INDOOR UNITS COMBINATION4 14
- MXZ-2A40VA 15
- MXZ-2A52VA 16
- MXZ-3A54VA 17
- MXZ-4A71VA 21
- MXZ-5A100VA 39
- SPECIFICATION 61
- Compressor 62
- NOISE CRITERIA CURVES 66
- OUTDOOR UNIT 67
- MICROPHONE 67
- OUTLINES AND DIMENSIONS 68
- REQUIRED SPACE 69
- 1.Installation space 70
- 2.Service space 70
- MXZ-4A71VA 72
- WIRING DIAGRAM 75
- MXZ-3A54VA 76
- REFRIGERANT SYSTEM DIAGRAM 87
- R.V. coil 88
- OFF 88
- ON 88
- Refrigerant flow in cooling 88
- Refrigerant flow in heating 88
- OFF 90
- ON 90
- R.V. coil 91
- MXZ-4A80VA 94
- MAX REFRIGERANT PIPING LENGTH 94
- PERFORMANCE CURVES 97
- , MXZ-2A52VA) 101
- (MPa[Gauge]) 109
- ACTUATOR CONTROL 115
- SERVICE FUNCTIONS 116
- 12-4. AUTO LINE CORRECTING 117
- <MXZ-2A> 117
- <MXZ-4A80VA 118
- , MXZ-5A100VA> 118
- TROUBLESHOOTING 120
- Lighting 126
- MXZ-3A/4A/5A 127
- (MXZ-3A54VA, MXZ-4A71VA)/ 128
- MXZ-3A54VA 129
- MXZ-4A71VA 129
- MXZ-2A30/2A40/2A52 130
- MXZ-3A54/4A71/4A80/5A100 130
- LED3 LED2 131
- LED1 LED2 131
- Check of R.V. coil 132
- Check of LEV 133
- EMERGENCY OPERATION 134
- E4 E5E5 E6 E7 E6 E7E4 E2 135
- Check of outdoor fan motor 136
- Check of HPS 137
- The other cases 137
- Check of bus-bar voltage 137
- 1. Inverter P.C. board 138
- Resistance (kΩ) 139
- Temperature (°C) 139
- MXZ-4A80VA 140
- MXZ-5A100VA 140
- MXZ-5A100VA 142
- 5. Outdoor Power board 143
- 6. Display P.C. board 144
- 7. Interface P.C. board 144
- DISASSEMBLY INSTRUCTIONS 145
- OPERATING PROCEDURE 146
- 1. Removing the compressor 148
- OPERATING PROCEDURE PHOTOS 150
- 14-4. MXZ-4A80VA 154
- 14-5. MXZ-4A80VA 157
- MXZ-2A40VA 160
- MXZ-2A52VA 160
- 15-3. DRAIN SOCKET 163
- Indoor unit connecting 167
- 15-9. ACCESSORY 170
- 3.0 1.4 600 173
- 3.0 2.0 200 173
- Outdoor unit 42 drain hole 175
- Soft vinyl chloride hose of 175
- 25 mm inside diameter 175
- 16-12. ACCESSORY 186
- MXZ-5A100VA 188
- 16-15. ACCESSORY 190
- OPTIONAL PARTS 192
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