Mitsubishi MT300 User Manual

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138
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Service
'10 • HM-T-149
c) At 30 seconds after starting compressor, the target frequency changes to
A
rps and the compressor is kept
operation at
A
rps as xed frequency for
B
minutes
Model Operation Mode A rps B min C rps
FDCW71VNX Cooling 20 10 −
FDCW100VNX Cooling 55 10 30
FDCW140VNX Cooling 20 10 −
3) Compressor protection start III (For FDCW71VNX and FDCW140VNX)
[Control condition] In case all of the following conditions are fulfilled
a) Restarting the compressor in heating mode after 2 hours or longer stop of compressor.
b) The outdoor air temperature at restart is lower than 0°C.
[Control contents]
a) It starts the compressor at 55rps as target frequency.
b) Compressor acceleration f inishes, when pressure difference becomes bigger than 0.34MPa
c) At 30 seconds after starting compressor, the target frequency changes to
A
rps and the compressor is kept
operation at
A
rps as fixed frequency for
B
minutes
Model Operation Mode A rps B min
FDCW71VNX Cooling 40 15
Outdoor fan control
1) Outdoor fan speed
a) Upper limit
①
FDCW100VNX
Model Operation Mode Fan speed (rpm)
FDCW100VNX
Cooling 870
Heating 740
②
FDCW71VNX and FDCW140VNX
According to the relation between the heat exchanger temperature and outdoor air temperature, maximum fan
speed is limited as follows.
i) Cooling
FDCW71VNX FDCW140VNX
ii) Heating
FDCW71VNX FDCW140VNX
Tho-A
Tho-R
A' A B C
a 850 850 850 710
b 850 850 710 600
c 710 710 600 400
d 600 600 400 200
(rpm)
Tho-A
Tho-R
A' A B C
a 745 745 745 640
b 745 745 640 560
c 640 640 560 370
d 560 560 370 200
(rpm)
C
B
A'
A
15
37
48
18
46
30
d
c
a
b
25
40
53
30
43
33
Tho-A
Tho-R
A' A B
a 850 850 850
b 850 850 710
c 710 710 600
(rpm)
Tho-A
Tho-R
A' A B
a 850 850 850
b 850 850 710
c 710 710 600
(rpm)
Outdoor air temperature (°C) Heat exchenger temperature (°C)
Operation control function by the outdoor unit controller

Mitsubishi MT300 Specifications

General

Brand	Mitsubishi
Model	MT300
Category	Heat Pump
Language	English