Mitsubishi Electric MXZ-2C30VA, Service Manual

Page: 83 / 396

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10-5. INCREASING MAXIMUM COMPRESSOR OPERATIONAL FREQUENCY AND FAN SPEED OF THE
OUTDOOR UNIT
<MXZ-4C80VA, MXZ-4C80VA2, MXZ-5C100VA, MXZ-5C100VA2>
10-6. CHANGING DEFROST FINISH TEMPERATURE AND HEAT OPERATION TIME
<MXZ-4C80VA, MXZ-4C80VA2, MXZ-5C100VA, MXZ-5C100VA2, MXZ-6C120VA, MXZ-6C122VA>
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 does not 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 “3” of SW2 on the outdoor P.C. board to ON to enable this function.
Turn ON the power supply for the air conditioner.
ON
SW2
1 2 3 4 5 6
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 “1” of SW2 on the outdoor P.C. board to ON to enable this function.
Turn ON the power supply for the air conditioner.
ON
SW2
1 2 3 4 5 6
Defrost finish temperature (°C)
Heat operation time (min.)
Initial setting
4C/5C
10
31
6C
13
31
Changed
4C/5C/6C
5
40
10-7. CHANGING THE AMPERE LIMIT
<MXZ-4C80VA, MXZ-4C80VA2, MXZ-5C100VA, MXZ-5C100VA2, MXZ-6C120VA, MXZ-6C122VA>
With this function, you can change the current that flows in the
outdoor unit.
[How to change the ampere limit]
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.
SW2
MXZ-6C120VA
MXZ-6C122VA
MXZ-4C80VA
MXZ-4C80VA2
MXZ-5C100VA
MXZ-5C100VA2
ON
10.5A
ON
15.5A
ON
Initial setting
Full
20A
25A
OBH584G