Mitsubishi SRK10CES, Technical Handbook

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13
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Note (1) Refer to the table shown above right for the values A and B.
¡
Normal mode (Normal heating operation, operation after HI POWER completion)
Indoor heat exchanger temp. (˚C)
¡
Values of A, B
A B
At 0 rps command 22 25
Other than 0 rps
17 19
command
A B 28 23 29.5 31.5 34 36 37.5 39 40
1st speed
2nd speed
3rd speed
4th speed
5th speed
6th speed
OFF
Indoor fan
(c) Details of control at each operation mode (pattern)
(i)
Fuzzy operation
Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the inverter speed.
(ii) Heating thermostat operation
¡
Operating conditions
If the speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation, the operation
changes to the heating thermostat operation.
¡
Detail of operation
Model
SRK13ZEV-S
Item
Inverter speed
0rps [Comp. stopped]
Indoor fan Hot keep normal mode
→
1st speed
Outdoor fan
Stop
Flap Horizontal
7th speed
8th speed
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 heat exchanger temp. (˚C)
A B 29 31 32 34 40 47 55
1st speed
2nd speed
3rd speed
4th speed
5th speed
6th speed
OFF
Indoor fan
(iv) Defrosting operation
1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
1
After start of heating operation
→
When it elapsed 35 minutes. (Accumulated operation time)
2
After end of defrosting operation
→
When it elapsed 35 minutes. (Accumulated compressor operation time)
3
Outdoor unit heat exchanger sensor (Th4) temperature
→
When the temperature has been below –2ºC for 3 minutes
continuously.
4 When the temperature difference between the outdoor air temperature sensor and the outdoor unit heat exchanger
sensor temperature exceeded 4.5
°
C
5 During continuous compressor operation
In addition, when the speed command from the indoor controller of the indoor unit during heating operation has
counted 0 rps 10 times or more and all conditions of
1
,
2
and
3
above are satisfied (note that when the temperature
for Th4 is -2
°
C or less: 62 rps or more, -1
°
C or less: less than 62 rps), defrost operation is started.
¡
Values of A, B
A B
At 0 rps command 22 25
Other than 0 rps
17 19
command
7th speed
(iii) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of
the indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger sensor) to prevent blowing of cool wind.