Mitsubishi Heavy Industries FDT90VNPWVH Service Manual page 40

1.4 Operation control function by the outdoor control
(1) Compressor speed
Item
Upper limit
Lower limit
Note (1) Valuc in ( ) are for the silent mode.
(2) Compressor protection start
(a) Compressor protection start I
(i) Operating condition
When the compressor is turned ON from the state of OFF.
(ii) Detail of operation
During the protection start I control, the upper limit of compressor speed is restricted to the speeds as shown
in the following table.
Cooling
FDC
90, 100
Heating
Note (1) Judgment by the outdoor air temperature sensor (TH2) is made only at the start of control during heating operation.
(b) Compressor protection start II
(i) Operating condition
When the outdoor air temperature sensor (TH2) has detected lower than 10°C after starting the compressor
during heating operation.
(ii) Detail of operation
During the protection start II control, the upper limit of compressor speed is restricted to the speeds as shown
in the following table.
FDC
90, 100
(3) Outdoor fan control
(a) Outdoor fan speed and fan motor speed
Fan speed
FDC90, 100
(b) Outdoor fan control at start (Cooling operation only)
When the outdoor air temperature (TH2) is lower than 22°C at the start of compressor, the outdoor fan is operated
at a fixed speed.
(i) When the outdoor air temperature is higher than 11°C, the compressor runs at 2nd speed for 30 seconds after
the compressor ON.
(ii) When the outdoor air temperature is lower than 11°C, the compressor runs at 1st speed for 30 seconds after
the compressor ON.
Model Cooling
FDC90
120 (68)
12
Less than 3 min
TH2 10°C
(1)
TH2<10°C
Time after compressor ON (Including acceleration time)
Less than 1 min
Tho-A> _ - 5°C
40
Tho-A<-5°C 55
1st speed 2nd speed 3rd speed
150 300
FDC100 FDC90
120 (74) 120 (70)
12 12
Time after establishment of operating conditions (Including acceleration time)
Less than 5 min
120 120
55 55
55 55
Less than 5 min Less than 7 min
45 120
55 120
4th speed 5th speed
500 650 740
39
- -
'19 • PAC-SM-334
Unit: rps
Heating
FDC100
120 (70)
12
Less than 7 min Less than 9 min
120 120
75 95
75 95
Less than 9 min 9 min or more
120 End of control
120 End of control
Unit: min
6th speed 7th speed 8th speed
835 890
Unit: rps
9 min or more
End of control
Unit: rps
-1
950