Mitsubishi Heavy Industries SRK20CC-S1 User Manual

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18
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Notes (1) Refer to the table shown above right for the values A and B.
Note (2) Values in ( ) are for type 20, 25, 35.
¡ Hot keep M mode [During HI POWER operation (for 15 min.)]
Indoor heat exchanger temp. (˚C)
AB2931 32 34 36 43
(40)
(43) (47)
1st speed
3rd speed
4th speed
5th speed
6th speed
7th 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 –5ºC for 3 minutes
continuously.
4 When the temperature difference between the outdoor air sensor temperature and the outdoor unit heat exchanger
sensor temperature exceeded 20. 25 type: 7.0°C, 35 type: 5.0°C, 50 type: 4.0°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 -5°C or less: 62 rps or more, -4°C or less: less than 62 rps), defrost operation is started.
2) Operation of functional components during defrosting operation
¡ 20, 25, 35 type
Indoor fan
RUN light
Corresponding
to speed
OFF
ON
Flashing
(Hot keep)
Outdoor fan
Inverter
command
Fuzzy calculated
value
70 rps
0
Corresponding
to speed
OFF
OFF
ON
(1)
4-way valve
Final defrost operation
Defrost control
Hot keep
Indoor unit
Outdoor unit
60 sec.
Hot keep
50 sec.
Normal heating operation restored
Defrost end
(Th4
>
=
13˚C, 10 minutes)
Defrost operation
Defrost operation
preparation
6th speed 6th speed
¡ Values of A, B
AB
At 0 rps command 22 25
Other than 0 rps
17 19
command
8th speed
9th speed
(20, 25, 35 only)
(20, 25, 35 only)
Note (1) When outdoor unit heat exchanger sensor (Th4) temperature becomes 2°C or higher, inverter command changes 70 rps to 50
rps.

Mitsubishi Heavy Industries SRK20CC-S1 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRK20CC-S1
Category	Air Conditioner
Language	English