Hitachi PC-ARFG2-Z Installation & Maintenance Manual page 41

22. Backup System Setting
This function is to setup the backup operation for multiple refrigerant system. The operation and standby of units
can be set at selected rotation cycle time.
NOTES:
•
This function is not available for one or more than five refrigerant systems.
•
This function cannot be set when connecting with econo-fresh, total heat exchanger or fresh air ventilator.
•
This function is available only when connecting outdoor units and indoor units support it.
•
This function is not available when the operation mode is "Cool/Heat Auto Changeover". Also, during
operation of the backup system, "Cool/Heat Auto Changeover" is not displayed in the operation mode.
•
When using two wired remote controller, this function can only be set on the primary wired remote
controller.
•
The rotation sequence is the order of the refrigerant system number.
•
If "Rotation Cycle Time" or "No. of Refrig. Systems to operate" is changed, the rotation sequence is initialized.
•
For the icon of backup system, please refer to the "3.7 Icon Description" in the operation manual.
Backup System Functions
1. Rotation Operation
Operation and standby(※1) are done at rotation cycle time set by the wired remote controller for each
refrigerant system.
System Example
System 1 System 2
Rotation procedure
Operation
System1
System2 Standby
Rotation Cycle Time
※1: In fan mode(Thermo-off).
※2: Choose from "9 hours"(default), "24 hours", "48 hours", "72 hours" and "96 hours".
※3: In order to stabilize the operation state, it shall be started before 30 minutes.
38
Standby
Operation
30Mins
3
2
22. Backup System Setting
Operation Standby
Standby Operation
A16381H9HF