Operation Control Function By The Outdoor Control; Normal Control; Operation Of Major Functional Components Under Each Operation Mode - Mitsubishi Heavy Industries FDC280KXZE1 Service Manual

1.4 Operation control function by the outdoor control

(A) Normal control
(1)

Operation of major functional components under each operation mode

Operation
mode
Functional
Components
Indoor unit fan
Indoor unit electronic
expansion valve
Compressor [CM1]
Magnetic contactor CM1
[52X1]
Compressor [CM2]
Magnetic contactor CM2
[52X2]
Outdoor unit fan [FMo-1]
Outdoor unit fan [FMo-2]
Inverter cooling fan
[FMC1, 2]
4 way valve [20S]
Electronic expansion valve
for heating [EEVH1, 2]
Electronic expansion valve
for sub-cooling [EEVSC]
Solenoid valve [SV1]
Solenoid valve [SV2]
Solenoid valve [SV6] [SV7]
Solenoid valve [SV11]
Solenoid valve [20UF]
Crankcase heater [CH1,2]
Notes(1) : ON, � : OFF, �/�, �/�: ON or OFF
�
(2) 1: The EEVH1, 2 of master unit are fully opened and those of slave unit are fully closed.
(3) 2: When the unit is stopped from cooling operation, the EEVH1, 2 of master unit are fully opened and those of slave unit are fully closed.
When the unit is stopped from heating operation, the EEVH1, 2 of both master and slave units are fully closed unless the opening degree is specified
by the low pressure protective control.
(4) 3: When the operation mode is changed from heating to cooling/dehumidifying, EEVH1, 2 are maintained at fully closed position and EEV of only one
indoor unit keeps 60 pulse until 20S is turned OFF.
(5) 4: When the operation mode is changed from cooling/dehumidifying to heating, EEVH1, 2 are maintained at fully opened position and EEVs of all
indoor units keep 0 pulse until 20S is turned ON.
(6) This shows the state of output when all indoor units are in the same operation mode.
Cooling
Thermostat ON Thermostat OFF
Remote control Remote control
command command
Superheating
Fully closed
control response
�
/ �
�
/ �
�
�
/ � / �
� �
3
1
Fully open
Opening pulse
Fully closed
control
/ �
�
/ �
�
/ �
�
�
�
/ �
�
/ � / �
Fan
Thermostat ON
Remote control Remote control
command command
Outlet temperature
Fully closed
control response
�
� /
/ �
�
�
� / / �
� /
/ �
�
�
4
Superheating
2
control response
Fully closed Fully closed
/ �
�
/ �
�
/ �
�
/ �
�
/ �
�
/ � / �

– –
'14 • KX-SM-202
Heating
Thermostat OFF Defrost
Intermittent
→ �
operation
Model-specific
Slight opening
aperture opening
control
angle
�
�
→ �
�
→ �
�
/ � / �
→ �
Fully closed
2
/ Fully open
Fully closed Fully closed
/ �
�
/ �
�
/ �
�
� �
/ � / �
/ � / �
ESP-FP-2100
Dehumidify
/ �
Superheating
Control Response
/ �
/ �
/ �
/ �
�
3
Fully open
Opening pulse
control
/ �
/ �
/ �
�
/ �
/ �
F