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2WAY SYSTEM
Control Functions - Outdoor unit
1
12. Other Functions
2WAY VRF SYSTEM
Control Functions
11. Backup Operation
All compressors of outdoor unit number 2 are backed up
Unit No. 1
Main unit
CCU function
Unit No. 2
Sub unit
Unit No. 3
Sub unit
Unit No. 1
Main unit
CCU function
Unit No. 2
Sub unit
Unit No. 3
Sub unit
Main outdoor unit Sub outdoor unit Sub outdoor unit
Number of setting 2 Not necessary Not necessary
Unit No. 123
Main outdoor unit Sub outdoor unit Sub outdoor unit
Number of setting 2 Not necessary Not necessary
Unit No. 123
All compressors in unit No. 2 are backed up. Therefore the setting No. of outdoor units installed on the main outdoor
PCB is changed to “2” from “3”.
All compressors of main outdoor unit are backed up
All compressors in unit No. 1 are backed up. Therefore the setting No. of outdoor units installed on the main outdoor
PCB is changed to “2” from “3”.
Same setting
Examples:
Combination of 3
outdoor units with
2 compressors
outdoor units with
2 compressors
Examples:
Combination of 3
outdoor units with
2 compressors
2WAY VRF SYSTEM
Control Functions
Case 1
→
The heating indoor units will be forced to thermostat OFF.
Number of thermostat ON indoor units in heating mode
Number of thermostat ON indoor units in heating mode
Number of thermostat ON indoor units in cooling mode >
Case 2
→
system selects cooling mode
system selects heating mode
The cooling indoor units will be forced to thermostat OFF.
Number of thermostat ON indoor units in cooling mode <
While the system is operating, the system judges whether to switch the mode in XX minutes intervals.
While the system is stopped, change the mode immediately.
EEPROM setting in main outdoor unit
CODE: 27
Setting No.
0
XX
Invalid
(at factory shipment)
30
40
30
40
50 50
60 60
90 90
120 120
180 180
240 240
*“XX” is able to be set in EEPROM on the outdoor unit’s PCB.
(It is impossible to perform the simultaneous cooling/heating operation.)
It is possible to select auto cooling/heating mode in each remote controller even in 2WAY VRF system.
The system changes to cooling or heating operation according to number of thermostat ON mode.
The system selects the mode that has more number of units with thermostat ON.
(1) Auto Cooling/Heating Function
SM830253-00_欧州2way7_SM-TRSM.indb 39 16/08/26 19:23:21
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