External Power Saving Control Processing; Thermo-Controller; Defrosting; Operation Control - Hitachi PC-ARF1 Operation Manual

10.1.4 External Power Saving Control Processing

During Outdoor Capacity Control setting in
process of the central controller or outdoor unit
The icon "Ext. Sav" will display as ON.
However, if the controller is set for indoor unit
rotation or intermittent operation control, the icon
will not display as ON.

10.1.5 Thermo-Controller

The fan speed is changed to "LOW" at the
thermo-controller actuation. However, the
indication is not changed. (It changes only in the
heating operation mode.)

10.1.6 Defrosting

Only device using both Cooling/Heating
(included multi Cooling/Heating device
for building)
• When in Defrosting Operation
The icon "Defrost" will display as ON and the
indoor fan will turn OFF.
The unit will be situated so the air will blow
horizontally.
• When Turning OFF Operation During Defrosting.
The operation light will turn OFF but the
operation will continue and the defrosting will
stop when complete.
40

10.1.7 Operation Control

Power Activation
• The icon "Preheating" will display as ON.
The compressor is preheating.
Because the unit cannot operate beyond four
hours at a maximum, do not turn OFF the
power of the outdoor unit in a Cooling/Heating
season.
Apply power to the outdoor unit(s) at least
12 hours prior to operation of the system for
preheating of the compressor oil.
Activating in Hot Start (only for Heating Mode)
• The icon "HOT-START" will display as ON.
The icon "HOT-START" will turn OFF when the
unit is not operating.
In an instance where the operation mode set by
the central station is different from the operation
mode of the outdoor unit
(when the outdoor unit is operating in a mode
other than heat/cool simultaneous operation.)
• The current operation mode and the message
"Other remote are in HEAT setting" will be
flashing.
Flashing
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