Demand Current Control (Only For 24 And 30Hp); Fixing Operation Mode - Hitachi RPI-0.8FSG1 Service Manual

OPTIONAL FUNCTION
(4.3 Outdoor Unit)

4.3.3 Demand Current Control (Only for 24 and 30HP)

In the case that the demand input terminals on the outdoor unit PCB are short-circuited, the compressor
frequency is controlled that the maximum limit of the outdoor running current is set 80%, 70% and 60%.
(The maximum limit of the outdoor unit running current can be selected according to the item "4.3 Outdoor
Unit".)
If the outddor unit running current decreses beyond the maximum limit, the indoor unit is put under themo-
OFF condition. The stoppage code No. "10" is given. When the input terminal is opened during the demand
current control, its control is reset.

4.3.4 Fixing Operation Mode

In the case that the fixing input terminals of the operation mode on the outdoor PCB are short-circuited, the
operation mode can be fixed at the cooling or heating mode.
Short-circuit between Terminals 1 and 2 of CN17: Fixed Heating Mode
Short-circuit between Terminals 2 and 3 of CN17: Fixed Cooling Mode
During this fixed heating (or cooling) mode, no cooling (or heating) operation is available. The indoor units
under the cooling or dry operation (or heating operation) will be changed to the Thermo-OFF condition
during this mode, and an alarm code of "20" appears.
4-28
Wiring Diagram Example of Demand Current Control
Outdoor Unit
Wiring Diagram Example of Fixing Operation Mode