Outdoor Fan Control; Outdoor Fan Speed And Fan Motor Rotation Speed; Fan Control During Cooling; Outdoor Fan Heating Control - Mitsubishi Heavy Industries KXZ Series Service Manual

(3) Outdoor fan control
(a) Outdoor fan speed and fan motor rotation speed
The 7th outdoor fan speed in the following table is specified as the rated speed. Under the normal control, the speeds up
to 9th level are used.
Outdoor fan tap
0th speed
1th speed
2th speed
3th speed
4th speed
5th speed
6th speed
7th speed
8th speed
9th speed
Note (1) Heating 9th speed changes it depending to outdoor air temperature Tho-A as follows.
(b) Fan control during cooling
During cooling and dehumidifying, fan speed is controlled in accordance with the high pressure (sensed by PSH) and the
outdoor air temperature (sensed by Tho-A).
(i) Initial fan speeds are as follows.
Initial ourdoor fan speed at cooling
Model
All models
(ii) Speed changes depending on high pressure value.
(iii) Under low outdoor air temperature condition, the stepless fan control between 130-300min
(c) Outdoor fan heating control
The fan speed control is performed based on the low pressure (detected with PSL) during heating operation.
(i) Initial fan speed is th speed.
(ii) Speed changes depending on low pressure value.
Cooling
-1
FMo1 [min ] FMo2 [min
0
200
200
300
390
530
600
730
825
900
950min
-1
3
Outdoor air temperature Tho-A (℃)
Outdoor air temp. ≤ 10ºC
2th speed
–
-1
] FMo1 [min
0 0
0 200
200 200
300 300
390 390
530 530
600 600
730 730
825 825
900 900/950
900min
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6
10ºC < Outdoor air temp. < 15ºC
4th speed

–
'14 KX-SM-221
'14 • KX-SM-221
Heating
-1 -1
] FMo2 [min ]
0
0
200
300
390
530
600
730
825
900/950
15ºC ≤ Outdoor air temp.
6th speed
is performed.
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