Hitachi PC-ARH1E User Manual

6.1.4 Operation Control

Supplying Electrical Power
The“•”isactivatedwhenelectricalpoweristurnedON.
In this case, the compressor is now in the preheat stage.
Operation might be delayed by a maximum of four hours. Do
not cut power to the outdoor unit during seasonal heating and
cooling operation.
Turned ON

During Hot Start (Heating Operation Only)
The“•”isturnedON.
Turned ON

Different Operation Mode
The operation mode set by the controller is different from the
outdoor unit operation mode.
(Except for the heat recovery system models.)
Theoperationmodeindicatorwillash.
Flashing
ThisindicatorwillashwhenacommandtoCOOLhasbeenset
by way of the controller during a HEATING operation.

Setback Operation
In case the setback operation is enabled and the card key is
removed, setpoint is compensated and fan operate at “Low”
speed. While in setback mode, the boundary lines on the screen
disappear.
By default,
Cooling: Setpoint +2.5°C
Heating: Setpoint -2.5°C
? NOTE
Advancedcongurationisneededfortheuseofsetbackoperationand
changingcompensationforsetback.Contactyourdistributorordealerfor
detailedinformation.
6.2 IN ABNORMAL CONDITIONS
6.2.1 Abnormality
• TheRUNLED(Red)isashing.
• The indoor unit number, alarm code, model code, and the
connected number of indoor units are displayed on LCD.
• In cases where a number of indoor units are connected, the
above items for each indoor unit are displayed one by one.
6.2.2 Power Failure
• All indicators are DARK.
• Once a unit is shut down by a power failure, it cannot
be restarted after the power recovers. Repeat starting
procedures again.
• In instances where the power failure and recovery are
instantaneous, the unit will restart automatically.
6.2.3 Electronic Interference
For instance, if a unit is in a shutdown state and all indicators
are OFF, this condition could have been induced by the reaction
of the unit’s micro-computer fail-safe protections against
electronic interference (EMI). If this is the case, perform restart
procedures.
OTHER INDICATORS
PMML0497 rev.1 - 12/2020
8

Hitachi PC-ARH1E Specifications

General

Brand	Hitachi
Model	PC-ARH1E
Category	Remote Control
Language	English