Maintenance And Repair; Abnormal Transmission Between The Remote Control And Indoor Unit; Troubleshooting Procedure For Units Connected To The Remote Control - Hitachi PC-ARF Technical Catalogue

4 Individual remote controls
PC-ART
H5 Central control available after forced stoppage.
This function is used in order allow the central control when unit is forced to stop.
When this function is "01", the central control is available.

4.2.7 Maintenance and repair

4.2.7.1 Abnormal transmission between the remote control and indoor unit

In this case, the LED run indicator located at the bottom left of the screen will flash every 2 seconds.
D A N G E R
Before analysing these problems, the system must be switched off at the mains.
Problem
Disconnection or inadequate
contact of the remote control
cable.
Remote control fault.
PCB fault (on the indoor unit and
remote control).
*1: See section Remote control self-checking procedure
*2: See section Checking procedure for each main component.

4.2.7.2 Troubleshooting procedure for units connected to the remote control

Possible causes:
• The remote control cable is broken.
• Remote control cable contact failure.
• Remote control plate failure.
• If the LED run indicator flashes 5 times for 5 seconds, the display will show the unit number and alarm code.
• Note down the code (see table) and request assistance from your distributor.
Unit number Alarm code
Refrigerant cycle number
The Alarm code corresponds to the alarm that is happening on the unit.
Refer to the Service Manual of the unit to know the meaning of the alarm code.
145
TCGB0106 rev.0 - 12/2014
Cause
Check the cable and the connec-
Cabling problem
Check remote control using the self-
Different causes
check mode
Wire disconnected
Check connectors.
from PCB
Check PCB using the self-check
PCB fault
.
Model code
Number of units connected
Check point
tions.
Replace the remote control, if faulty.
.
*1
.
*2
mode
Indication
Action
Repair or connect the cable.
Connect wires correctly.
Change the PCB, if faulty.
Model number
Model
Heat pump
H
Inverter
P
Multiple
F
Cooling only
C
Other
E
IVX, individual
b
operation
KPI
L
4