Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 198 / 1106

196
SCM-HG (2 room)
(d) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor fan is controlled based on the temperature of the
indoor unit heat exchanger (detected with Th
I
-R, indoor unit heat exchanger thermistor) to prevent blowing of cool wind.
¡
Normal mode (Normal heating operation, operation after HI POWER completion)
1st speed
¡
Values of a, b
A B
At 0 rps command 22 25
Other than 0 rps
17 19
command
Note (1) Refer to the table shown above right for the values A and B.
¡
Hot keep M mode [During HI POWER operation (for 15 min.)]
Indoor fan
Indoor heat exchanger temp. (˚C)
2nd speed
3rd speed
4th speed
5th speed
6th speed
7th speed
1st speed
Indoor heat exchanger temp. (˚C)
2nd speed
3rd speed
4th speed
5th speed
6th speed
7th speed
(e) Defrosting
(i) When the following conditions are met, the defrosting operation will start.
1) During normal operation
a) When 40 minutes has passed since the start of heating or 40 minutes after the last defrosting (based on
cumulative operation time of compressor).
b) When the outdoor heat exchanger thermistor (Tho-R) temperature is –2
°
C or less for 3 continuous minutes
after 37 minutes have passed.
c) Outdoor temperature thermistor (Tho-A) – outdoor heat exchanger thermistor (Tho-R) temperature 0.44
×
outdoor temperature thermistor (Tho-A) tempe A
°
C or more.
A = Outdoor temperature – 2
°
C: 4, outdoor temperature < – 2
°
C: 6.
d) When the compressor is operating.
u
Or, during heating, defrosting will start when the decision speed counts zero (0) rps for 10 times or more
and all conditions in a), b) and d) have been satisfied.
2) `During defrosting acceleration
a) When 40 minutes has passed since the last defrosting (based on cumulative operation time of compressor).
b) When the compressor is operating.
u
Or, during heating, defrosting will start when the decision speed counts zero (0) rps for 10 times or more
and all conditions in a) and b) have been satisfied.
Note (1) Defrosting acceleration is when the finishing of the previous defrosting is according to the defrosting conditions of the 10 minutes
that have passed.
Indoor fan