Indications In Normal Conditions; Indications In Abnormal Conditions - Hitachi PC-ARF Technical Catalogue

4 Individual remote controls
PC-ART

4.2.5.2 Indications in normal conditions

• Thermostat Stoppage
When the thermostat of the unit is off, the fan speed changes to LOW and the indicator will not change.
(Heating mode only.)
• Defrost
When the system is running in defrost mode, the DEFROST indication will appear.
The fan of the indoor unit will slow down or stop (as selected).The louver will stop in the horizontal po-
sition at 35°. However, the indicator on the LCD screen will remain on. (The figure shows the system
status when set to DEFROST.)
When the unit stops during defrost mode, the run indicator (green) will switch off. However, the system
will continue to display DEFROST and the unit will start-up once the defrost mode is complete.
• Filter
Clogged filter: The FILTER indication will appear when the time programmed in function b4 (see Op-
tional function list) expires, indicating that it needs to be cleaned.
Clean the filter: Press the RESET button after cleaning. The FILTER sign will turn off.

4.2.5.3 Indications in abnormal conditions

• Abnormal condition
The run indicator (green) will flash.
The ALARM indicator will be displayed on the LCD screen.
The screen will also indicate the number of the indoor unit, the alarm code and the model
code.
If several indoor units are connected, these indications will be displayed for each one, one
at a time.
Note down the indications and contact your HITACHI service provider.
• Power failure
All on-screen indications will disappear.
When the unit stops due to a power failure, it will not restart automatically, even when the
power is restored. In the event of a power failure lasting no more than 2 seconds, the unit
will restart automatically.
• Electrical noise
There may be cases when all of the display indications are off and the unit is stopped.
This is because the microcomputer has switched on to protect the unit from electrical noise.
N O T E
• In cases where a wireless remote control is being used for the indoor wall type unit,
remove the connectors (CN25) connected to the indoor PCB. Otherwise, the unit will
not work.
• Stored data cannot be deleted unless the remote control is reset.
128
TCGB0106 rev.0 - 12/2014
Indoor unit number
Alarm code
Model Code
Alternate indi-
cation every
second
Alarm
code
Number of con-
nected indoor
units
Model number
Indication Model
Heat pump
H
Inverter
P
Multiple
F
Cooling only
C
Other
E
IVX, individual
b
operation
L KPI