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Mini VRF SYSTEM
Control Functions - Outdoor unit
1
7. 4-Way Valve Adjustment Control
2WAY VRF SYSTEM
Control Functions
7. Oil Control
Pulse of MOV
Flap
For
K2
Except
K2
Type of
indoor unit
Operating
mode
of indoor unit
Thermostat
ON/OFF
Setting No. 0
EEPROM setting in main outdoor unit
CODE: 24
Setting No. 1
Stop
Fan
Cooling*
Stop
Fan
Cooling*
OFF
ON
OFF
ON
80 – 160
80 - 160
80 – 160
Present pulse+20
80 – 160
80 – 160
80 – 160
Present pulse+20
Fan speed
Stop
LL
Set speed
L
Stop
Stop
Set speed
L
Fan speed
LL
LL
Set speed
L
Stop
Stop
Set speed
L
Flap
Open
Open
(3) Indoor Unit Self Oil Recovery Control
This control is carried out regularly when the system is in cooling mode.
During stopped, fan mode setting or thermostat OFF condition at the indoor unit, MOV of the indoor unit is opened
regularly for 1 minute (at the interval of approximately 40 minutes).
During the thermostat ON, MOV of the indoor unit is opened 20 pulses from the current status.
* MOV pulse might be different from the table listed above depending on the use conditions.
8. 4-Way Valve Adjustment Control
2WAY VRF SYSTEM
Control Functions
The first operation after turning on power supply to outdoor unit.
The mode of the system changes.
The purpose of this control is to change over the 4-way valve appropriately with big pressure difference.
This control is performed at the following conditions.
Cooling operation
*When the above operation is finished, normal operation starts at the horsepower determined by the indoor units
where thermostats are ON.
*When the above operation is finished, normal operation starts at the horsepower determined by the indoor units
where thermostats are ON.
The first operation after all outdoor units stopped for 60 minutes.
For 60 seconds
Indoor units
Control time
Outdoor units
MOV
RAP valve kit
Fan
Outdoor units operate at 40 ~ 90Hz.
MOV at all indoor units operate at a fixed pulse according to the indoor unit
capacity.
All indoor units operate in Cooling mode (OFF status).
Fan rotates at the set fan speed depending on the indoor unit operation mode
or at fan speed “LL”.
Minimum 1 min - Maximum 20 min
Termination condition for control must be satisfied with the following three performances.
・Control has been for 20 minutes.
・Detected HPT ≥ 35°C
・Detected HPT ≥ 25°C and continuously for about 60 seconds
Indoor units
Control time
Outdoor units
MOV
RAP valve kit
Fan
Outdoor units operate at 40 ~ 90Hz.
MOV at all indoor units initially operates 250 pulses and then runs in SC control mode.
All indoor units operate in heating mode (ON status).
Fan rotates at the set fan speed depending on the indoor unit operation mode or at
“LL” fan speed, or stops.
Heating operation
SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 21SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 21 2021/05/07 10:10:292021/05/07 10:10:29
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