Hitachi NEXT Series Instruction Manual page 39
Oil-free rotary screw air compressor
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Also See for NEXT Series:
- Instruction manual (110 pages) ,
- Service manual (85 pages) ,
- Instruction manual (144 pages)
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Table of Contents
■ During Operation
LCD Indication
Heading
Trouble Description
Clogging of air intake filter
(AIR FILTER)
1st stage discharge air
temperature (DIS. TEMP. 1)
1st stage discharge air
temperature (DIS. TEMP. 1)
2nd stage discharge air
ALARM
temperature (DIS. TEMP. 2)
2nd stage suction air
temperature (2ND-S. TEMP)
Oil temperature (OIL TEMP)
[Fixed Speed type]
Oil pressure (LOW O.P.)
Load/unload cycle time
over (L COUNT OVER)
■ Others
LCD Indication
Heading
Trouble Description
Battery out (BATTERY OUT) Battery voltage low
Scheduling operation error
(SCHEDULE SET ERR)
Lead/lag operation error
PROBLEM
(MULTI-U SET ERR)
RS-485 port error
(COM.ERR STOP) NOTE 3
RS-485 port error
(COM.ERR ALM) NOTE 3
PCB error
(PCB ERR)
Interstage pressure sensor error
(PRESS. SNSR ERR 1)
Discharge pressure sensor error
(PRESS. SNSR ERR 2)
Oil pressure sensor error
(PRESS. SNSR ERR 4)
FAILURE
2nd stage inlet
temperature sensor error
(TEMP. SNSR ERR 2)
1st stage outlet
temperature sensor error
(TEMP. SNSR ERR 3)
2nd stage outlet
temperature sensor error
(TEMP. SNSR ERR 4)
Oil temperature sensor error
(TEMP. SNSR ERR 5)
NOTES:
(1) Depends on the specification, reverse phase relay is used.
(2) The air compressor using reverse phase relay, such as for 460 V/60 Hz, indicates a phase-lacking connection as reversal phase.
(3) Communication error details:
Port 1(65) =Main circuit communication (Vtype), Port 2 (66)=Fan inverter communication (Air-cooled model)
Port 3 (67)= LCD communication, Port 4 (68)= Multiple unit control communication, Port 5 (63)= External communication
Failure
What and How to Detect
Light
Pressure differential of -0.72
ALARM
psi 4.98 kPa or more
Blinks
About 428 [410]℉
ALARM
Blinks
220 [210]℃ or higher
The temperature detected at
1st stage rises above the below
settings.
ALARM
100 psi model
about 437℉
Blinks
0.69MPa model
[about 410℉]
about 225℃
125 psi model
[about 210℃]
0.86MPa model
● For working pressure of
100psi 0.69MPa model : About
ALARM
437 [419]℉ 225 [215]℃ or higher
● For working pressure of
Blinks
125psi 0.86MPa model : About
491 [473]℉ 255[245]℃ or higher
154 [149]℉
ALARM
68 [65]℃ or higher
Blinks
154 [149]℉
ALARM
68 [65]℃ or higher
Blinks
ALARM
15 psi 0.10MPa or lower
Blinks
ALARM
1,000,000 cycles
Blinks
Failure
What and How to Detect
Detector Shutdown
Light
ALARM
CPU
Blinks
Start/stop time not set
ALARM
CPU
yet
Blinks
ALARM
Setting error
CPU
Blinks
SHUTDOWN
Setting error
Thermistor
Blinks
ALARM
Pressure
Setting error
Blinks
sensor
(ROM1) (RAM1) main
SHUTDOWN
CPU
board memory error
Blinks
(ROM2) (RAM2) LCD
SHUTDOWN
CPU
board memory error
Blinks
SHUTDOWN
PS1 disconnected
CPU
Blinks
SHUTDOWN
PS2 disconnected
CPU
Blinks
SHUTDOWN
PS4 disconnected
CPU
Blinks
SHUTDOWN
TH2 disconnected
CPU
Blinks
SHUTDOWN
TH3 disconnected
CPU
Blinks
SHUTDOWN
TH4 disconnected
CPU
Blinks
SHUTDOWN
TH5 disconnected
CPU
Blinks
4. TROUBLESHOOTING [Protective Device]
Detector Shutdown
What Actions to Take
Pressure
No
9.4
differential
sensor
Thermistor
No
4.2
Thermistor
No
4.2
Thermistor
No
4.2
Thermistor
No
4.2
Thermistor
No
4.2
Pressure
No
4.2
sensor
Replace suction throttle valve
CPU
No
consumable parts and Blow
off solenoid valves
What Actions to Take
Disconnect the power and replace the
No
battery with a new one.
No
See 3.3.5 (4)
Check the wire and the operation setting
No
on the instrument panel.
Yes
Check the wire and the operation setting.
Check the wire and the operation
Yes
setting.
Disconnect the power and then reconnect the
Yes
power. If problem is persists, change the PCB.
Disconnect the power and then reconnect the
Yes
power. If problem is persists, change the PCB.
Yes
Yes
Disconnect the power and check the
pressure sensor wire for tightness.
Yes
Yes
Yes
Disconnect the power and check the
Yes
thermistor sensor wire for tightness.
Yes
History
Error
How to Reset
code
code
Press RESET
21
E0.21
button.
Automatically
25
E0.25
reset.
Automatically
25
E0.25
reset.
Automatically
26
E0.26
reset.
Automatically
2B
E0.2B
reset.
Automatically
26
E0.26
reset.
Automatically
2C
E0.2C
reset.
Hold down the
REMOTE and
press the
59
E0.59
SELECT/WIDE
button for 7
seconds or more.
How to
History
Error
Reset
code
code
Press RESET
64
E0.64
9.4 (12).
button.
Press RESET
62
E0.62
button.
Press RESET
5B
E0.5B
button.
Press RESET
63 65
E0.63 65
button.
〜 68
〜 68
Press RESET
63 65
E0.63 65
button.
〜 68
〜 68
Press RESET
43
E0.43
button.
47, 48
47, 48
Press RESET
41, 42
E0.41,
button.
46
42 46
Press RESET
33
E0.33
button.
Press RESET
34
E0.34
button.
Press RESET
39
E0.39
button.
Press RESET
32
E0.32
button.
Press RESET
35
E0.35
button.
Press RESET
36
E0.36
button.
Press RESET
37
E0.37
button.
37
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Troubleshooting
