Outline Of Heating Operation - Mitsubishi Heavy Industries SRK20ZD-S1 Technical Manual

(8) Outline of heating operation

(a) Operation of major functional components in heating mode
Functional
components
Indoor fan motor
Flap and louver
Display
Outdoor fan motor
4-way valve
Electronic expansion valve
(b) Air flow selection
(i) Speed of inverter changes within the range of selected air flow.
Air flow selection
Inverter command speed
Auto
Air flow
Inverter command speed
HI
Air flow
Inverter command speed
MED
Air flow
Inverter command speed
LO
Air flow
Inverter command speed
ULO
Air flow
(ii) When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(iii) Outdoor unit blower operates in accordance with the inverter command speed.
(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 command speed.
(ii) Heating thermostat operation
¡ Operating conditions
If the inverter command speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy opera-
tion, the operation changes to the heating thermostat operation.
¡ Detail of operation
Item
Inverter command speed
Indoor fan motor
Outdoor fan motor
Flap and louver
Item
When the inverter
speed is 0rps
ON
ON or OFF
Lights up
Depending on the stop mode
Model
Model
When the inverter speed
is other than 0rps
ON
ON or OFF
Lights up
ON
ON
Depending on the EEV control
SRK63ZE-S1
12~88rps
Depends on inverter command speed.
12~88rps
9th speed fixed
12~88rps
7th speed fixed
12~74rps
5th speed fixed
12~40rps
3rd speed fixed
SRK63ZE-S1, 71ZE-S1
0rps [Comp. stopped]
Hot keep N or M mode → 1st speed
Stop
Horizontal, center
83
- -
When the inverter speed is 0rps
due to an anomalous stop
OFF
Stop position control
Lights up or flashes
Depending on the stop mode
SRK71ZE-S1
12~95rps
12~95rps
12~95rps
12~80rps