Hitachi NEXT Series Instruction Manual page 36

4. TROUBLESHOOTING [Protective Devices]
■ Others
LCD Indication
Heading Trouble Description
Clogging of air
intake fi lter
Discharge air
temperature (1)
Discharge air
temperature (2)
ALARM
2nd-stage suction air
temperature
Oil temperature
Oil pressure
[Fixed speed]
L. COUNT OVER
( Load/unload cycle
count)
Battery out
Error of a scheduling
operation
Error of a multiple-
PROBLEM
unit operation
Error of RS−485C
port
Error of RS−485
port
PCB error
CT error
Pressure sensor
(disconnection 1)
Pressure sensor
(disconnection 2)
FAILURE
Pressure sensor
(disconnection 4)
Temperature sensor
(disconnection 2)
Temperature sensor
(disconnection 3)
Temperature sensor
(disconnection 4)
Temperature sensor
(disconnection 5)
NOTES:
1. Both the DSP for a 400 V class power supply and the DSP with a control circuit of 100 volt employ a reversal phase relay.
2. Both the DSP for a 400 V class power supply and the DSP with a control circuit of 100 volt indicate a phase-lacking connection as a reversal phase.
3. Battery Replacement:
Replace the battery with a new one every 6 years. When replacing, disconnect the power and complete the replacement work within 15 minutes.
4. If a Thermistor is disconnected, an override operation is not allowed. Contact your distributor immediately.
5. Refer the normal indication value of devices in the coution decal on the front panel of the unit for the setting values of waring.
34
What and SHUTDOWN
How to Detect MODE Li g ht
Pressure differential of Blinks
differential
−4.98kPa (0.7psi) or more in green
The temperature detected
at 1st stage rises above
Blinks
the below settings.
Thermistor
in green
NOTE 5)
The temperature detected
at 2nd stage rises above
Blinks
the below settings.
Thermistor
in green
NOTE 5)
63℃ (145℉) or higher Blinks
Thermistor
(after the intercooler) in green
Blinks
63℃ (145℉) or higher Thermistor
in green
0.10MPa (15psi) or Blinks
Pressure sensor Yes See page 35
lower in green
Blinks
1 million times
in green
Blinks
Battery voltage low
in green
Start/stop time not set Blinks
yet in green
Blinks
Setting error
in green
Blinks
Setting error Thermistor
in green
Blinks
Setting error Pressure sensor Yes
in green
(ROM1) (RAM1) Blinks
MAIN Memory failed in red
(ROM2) (RAM2) Blinks
LCD Memory failed in red
Blinks
Disconnected
in red
PS1 disconnected (sensor Blinks
for interstage pressure) in red
PS2 disconnected (sensor Blinks
for discharge air pressure) in red
PS4 disconnected (sensor
Blinks
for Oil pressure) in red
TH2 disconnected (thermistor Blinks
for interstage temperature) in red
TH3 disconnected (thermistor for Blinks
2nd-stage discharge temperature) in red
TH4 disconnected (thermistor for Blinks
1st-stage discharge temperature) in red
TH5 disconnected Blinks
(thermistor for oil temperature) in red
Detector Shutdown What Actions to Take
Pressure
No See page 73
sensor
No See page 35
No See page 35
No See page 35
No See page 35
Replace suction throttle valve consum-
CPU No
able parts and Blow off solenoid valves
Disconnect the power, and replace the
CPU No
battery with a new one.
CPU No Check the operation setting.
Check the wire and the operation
CPU No
setting.
Check the wire and the operation
Yes
setting.
Check the wire and the operation
setting.
Disconnect and reconnect the power. If the
CPU Yes
problem is reproduced, change the PCB.
Disconnect and reconnect the power. If the
CPU Yes
problem is reproduced, change the PCB.
Disconnect the power and check the
CPU Yes
CT sensor wire for tightness.
CPU Yes
CPU Yes
Disconnect the power and check the
pressure sensor wire for tightness.
CPU Yes
CPU Yes
CPU Yes
Disconnect the power and check the
CPU Yes
thermistor sensor wire for tightness.
CPU Yes
How to History
Reset Code
Press RESET
21
button.
Automatically
25
reset.
Automatically
26
reset.
Automatically
2B
reset.
Automatically
26
reset.
Press RESET
2C
button.
Hold the REMOTE
Button and SELECT/
59
WIDE Button for
at lease 7 seconds
Press RESET
64
button.
Press RESET
62
button.
Press RESET
5B
button.
Press RESET 63 65
button.
〜68
Press RESET 63 65
button.
〜68
Press RESET 43
button. 47, 48
Press RESET 41, 42
button. 46
Press RESET
E10
button.
Press RESET
33
button.
Press RESET
34
button.
Press RESET
39
button.
Press RESET
32
button.
Press RESET
35
button.
Press RESET
36
button.
Press RESET
37
button.