2WAY SYSTEM
Control Functions - Outdoor unit
1 - 36
1
11. Backup Operation
2WAY VRF SYSTEM
Control Functions
11. Backup Operation
Alarm List 2 (Backup operation continues unless power supply of all outdoor units is turned off.)
Function A
1.
2.
When there is one outdoor unit in the system, only compressor that has sensor failure stops.
When there are multiple outdoor units in the system, only the outdoor unit which contains the problem stops
but the other outdoor units in the system operate normally.
Function B
* Backup operation started by alarm shown in “Alarm List 2” will stop automatically after 24 hours if the same
alarm does not occur again within 24 hours.
1.
2.
When there is one outdoor unit in the system, the backup operation does not work.
When there are multiple outdoor units in the system,only the outdoor unit which contains the problem stops
but the other outdoor units in the system operate normally.
Description
Compressor 1 discharge thermistor error
Compressor 2 discharge thermistor error
Gas temperature thermistor error in outdoor unit heat exchanger 1
Liquid temperature thermistor error in outdoor unit heat exchanger 1
Ambient air temperature thermistor error
Compressor inlet temperature thermistor error
Super-cooling gas sensor error
High pressure sensor error
Low pressure sensor error
Gas temperature thermistor error in outdoor unit heat exchanger 2
Liquid temperature thermistor disconnected in outdoor unit heat exchanger 2
Compressor 1 discharge temperature thermistor disconnected
Oil temperature thermistor 1 connection error
Compressor 2 discharge temperature thermistor disconnected
Oil temperature thermistor 2 error
Compressor 1 discharge temperature error
Alarm
display
F04
F05
F06
F07
F08
F12
F14
F16
F17
F23
F24
H05
H08
H15
H27
P03
P17 Compressor 2 discharge temperature error
Compressor
/ outdoor unit
operation
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
Function B
1-2. Start of automatic backup operation
If the above alarms occur, the alarm is displayed on the remote controller, etc.
Pressing the remote controller button again starts automatic backup mode.
1-3. Backup operation information display
If the timer remote controller is connected, “” display blinks during operation.
2WAY VRF SYSTEM
Control Functions
(2)
2-1.
(1) Reduce the number of outdoor units set at outdoor unit No.1 by only the number of failed outdoor units.
(2) At the SW7 switch on the PCB of the failed outdoor unit, turn ON the switches for all compressor to disable,
and turn ON the “BACKUP” switch.
(3) Close all service valves at the failed outdoor units.
(4) Reset the power at outdoor unit number 1.
* The outdoor unit that backed up all compressors is not controlled by CCU (main outdoor unit).
Even if all compressors of the main outdoor unit are backed up, they are not controlled by CCU.
However, the CCU function stays active.
Disconnecting the failed outdoor unit
2-2.
At the SW7 switch on the PCB of the failed outdoor unit, turn ON the switch for the compressor to disable,
and turn ON the “BACKUP” switch.
Disabling operation of 1 compressor (Type: 14, 16, 18, 20HP)
The manual backup can be used when it is necessary to close the service valve for maintenance, etc.
11. Backup Operation
Manual Backup Operation
Backup operation procedure
Type of outdoor unit
SW7 switches to turn ON
SW7 switches to turn ON
8HP 10HP
INV1 + BACKUP
12HP 14HP
INV1 + INV2 + BACKUP
16HP 18HP 20HP
ON
OFF
BACKUPINV1
INV2
ON
OFF
BACKUPINV1
INV2
Type of outdoor unit
In the case of
INV1 compressor
14HP 16HP 18HP 20HP
ON
OFF
BACKUPINV1
INV2
In the case of
INV2 compressor
ON
OFF
BACKUPINV1
INV2
SM830253-00_欧州2way7_SM-TRSM.indb 36 16/08/26 19:23:20
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