Outline Of Heating Operation - Mitsubishi Heavy Industries SRK20ZMX-S Technical Manual

(Left End Installation)
(iv) Press the ON/OFF button.
The air-conditioner's installation location is set.
Press within 60 seconds of setting the installation location (while the installation location setting display illuminates).

(14) Outline of heating operation

(a) Operation of major functional components in heating mode
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
Fan speed
Auto
MED
When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(ii) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the tem-
perature of the indoor heat exchanger (Th2) to prevent blowing of cool wind.
However, if the fan speed setting is HI and room temperature is 19ºC or higher, this control is not executed.
(c) Defrosting operation
(i) 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 45 (model SRK50, 60 : 35) minutes. (Accumulated compressor operation time)
2) After end of defrosting operation
When it elapsed 45 (model SRK50, 60 : 35) minutes. (Accumulated compressor operation time)
3) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below － 5ºC for 3 minutes continuously.
Airflow range
Thermostat ON
ON
ON
ON
ON
Model
SRK20ZMX-S
30~94rps
30~94rps
HI
30~66rps
30~40rps
LO
30~40rps
ULO
Airflow range
(Center Installation)
Heating
Thermostat OFF
OFF
ON(HOT KEEP)
OFF
(few minutes ON)
ON
(3 minutes ON)
SRK25ZMX-S SRK35ZMX-S
30~102rps 30~115rps
30~102rps 30~115rps
30~72rps 30~76rps
30~42rps 30~46rps
30~40rps 30~40rps
52
- -
'13 • SRK-T-144
Airflow range
(Right End Installation)
Failure
OFF
OFF
OFF
OFF
SRK50ZMX-S SRK60ZMX-S
12~106rps 12~120rps
12~106rps 12~120rps
12~74rps 12~90rps
12~42rps 12~58rps
12~40rps 12~40rps