Checking Procedure For Each Main Component - Hitachi PC-ARF Technical Catalogue

4 Individual remote controls
PC-ART
Step
No.
Control information
9 - Displays internal remote control information.
- For the SET-FREE unit, this indication shows the number of compressors running.
Temperature of the discharge gas in the top of compressor chamber (°C).
10
- (Example) When several compressors are running, the average temperature of 2 compressors is given.
Remote control thermostat temperature
11 - Indicates internal remote control information.
- It has no specific meaning.
Operating frequency (Hz)
12
- The total frequency is indicated when several compressors are running at once.
Step
No.
13 Indoor unit expansion valve opening.
14 Outdoor unit MV1 expansion valve opening.
Step
No.
Compressor operating current
15
- The total value is indicated when several compressors are running at once.
16 Go back to step 1, temperature indication.

4.2.7.4 Checking procedure for each main component


PCB self-checking procedure using the remote control
Use the following troubleshooting procedure to check the PCB in both indoor and outdoor units.
Step
No.
1 Stop the machine by pressing the Run/Stop button.
PCB check mode:
2
Press and hold both buttons for 3 seconds.
Indication of the number of the outdoor unit (RN) and indoor unit (ADDS) to which
3
the remote control is connected.
After 7 seconds:
4
Automatic PCB operation check.
154
TCGB0106 rev.0 - 12/2014
Compressor pressure/frequency indicator
Indication of the expansion valve opening
Estimated electrical current indication
Action required
(continued on next page)
99
9A
9b
9C
9d
9E
9F
Image
RUN/STOP
Press
TEMP OK
5

e.g.: Indication of unit no. "01"
:
18
04
44
44
20
99
20