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Troubleshooting; Protective Device - Hitachi NEXT Series Instruction Manual

Oil-free rotary screw air compressor
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4. TROUBLESHOOTING

If a shutdown, alarm, problem or failure occurs, investigate the cause and take proper corrective action
before restarting. If there is any questions or comments, contact the local HITACHI distributor/master
dealer or representative office.

4.1 Protective Device

The air compressor is provided with the protective devices listed below. If shutdowns are detected by these protective
devices, remove the cause with referring to the LCD monitor indication and this manual, and then press the RESET
button to clear the shutdown indication. Depending on the type of shutdown, contact the local HITACHI distributor/
master dealer or representative office.
■ When connecting the power
LCD Indication
Heading
Trouble Description
Reversal phase connection
(Note 2)
POWER
Phase-lacking connection
Instantaneous power interruption Power interruption for 1 to 5 sec.
Brief instantaneous power
interruption
■ During Operation
LCD Indication
Heading
Trouble Description
1st stage discharge air temperature
(HIGH DIS. TEMP. 1)
1st stage discharge air temperature
2nd stage discharge air
temperature
(HIGH DIS. TEMP. 2)
Interstage pressure
[Fixed speed type]
Interstage pressure
2nd stage suction air temperature
(2ND SUCT. TEMP)
Oil temperature
SHUTDOWN
(OIL HIGH TEMP)
Oil pressure
[Fixed speed type]
Oil pressure
(OIL-LOW PRESS)
Answer error of 52
Overloading(main motor)
[Fixed speed type]
Overloading (main motor)
Overloading (auxiliary motor) Detected during operation
Answer error of 52
Answer error of 42
[Fixed speed type]
FAILURE
Inverter tripping or main
motor overloading with
automatic retrials.
INV STOP
36
CAUTION
Failure
What and How to Detect
Detector Shutdown
Light
CPU
Detected for 3
(Note 1)
SHUTDOWN
seconds after
Blinks
connecting the power
CPU
(Note 1)
CPU
-
Power interruption for
CPU
1 sec or less.
Failure
What and How to Detect
Light
About 437 [419]℉
SHUTDOWN
225 [215]℃ or higher
The discharge temperature at 1st
stage rises above the below settings.
100 psi model
SHUTDOWN
about 446°F
0.69 MPa model
[about 419°F]
about 230℃
125 psi model
[about 215℃]
0.86 MPa model
● For working pressure of
100psi 0.69 MPa : About 446[428]℉
SHUTDOWN
230 [220]℃ or higher
● For working pressure of
125psi 0.86 MPa : About 500[482]℉
260 [250]℃ or higher
SHUTDOWN
39psi 0.27MPa or higher
SHUTDOWN
44psi 0.30MPa or higher
163 [158]℉
SHUTDOWN
73 [70]℃ or higher
163 [158]°F
SHUTDOWN
73 [70]℃ or higher
SHUTDOWN
12 psi 0.08 MPa or lower
● For fi xed Speed type:
12 psi 0.08 MPa  or lower
SHUTDOWN
● For Vtype:12psi 0.08 MPa   or
lower (operating Freq. 45 Hz or
higher) 6psi 0.04MPa   or lower
(operating Freq. Less than 45 Hz)
239℉ 115℃ or higher
Blinks
(main motor bearing)
in red
239℉ 115℃ or higher
Blinks
(main motor bearing)
in red
SHUTDOWN
Detected during operation
SHUTDOWN
Detected during
SHUTDOWN
running.
Detected after shifting to △
SHUTDOWN
running.
SHUTDOWN
Failure signal from inverter
What Actions to Take
Reconnect the power cable tightly, check the
power supply and incoming power for loose
Yes
connections and change the connection
location of 2 of the 3 phases, be sure to follow
all electrical safety procedures.
Reconnect the power cord tightly, check the
Yes
power supply, and take a corrective remedy.
Restart
3.4.5
Restart
3.4.5
※ The value in the [ ] is for water-cooled model
Detector Shutdown
What Actions to Take
4.2
Thermistor
Yes
Blinks
Thermistor
Yes
4.2
Blinks
4.2
Thermistor
Yes
Blinks
Pressure
Yes
4.2
Blinks
sensor
Pressure
Yes
4.2
Blinks
sensor
Thermistor
Yes
4.2
Blinks
Thermistor
Yes
4.2
Blinks
Pressure
Yes
4.2
Blinks
sensor
Pressure
Yes
4.2
Blinks
sensor
Thermo
Yes
4.2
stat
Thermo
Yes
4.2
stat
Thermal
Yes
4.2
Blinks
relay
Thermal
Yes
4.2
Blinks
relay
CPU
Yes
4.2
Blinks
CPU
Yes
4.2
Blinks
Failure
stop after
CPU
4.2
repetition
Blinks
of retrials.
How to
History
Error
Reset
code
code
01
E0.01
Press RESET
button.
4.2.
02
E0.02
03
E0.03
-
04
E0.04
How to
History
Error
Reset
code
code
Press RESET
55
E0.55
button.
Press RESET
55
E0.55
button.
Press RESET
56
E0.56
button.
Press RESET
52
E0.52
button.
Press RESET
52
E0.52
button.
Press RESET
5B
E0.5B
button.
Press RESET
58
E0.58
button.
Press RESET
5C
E0.5C
button.
Press RESET
5C
E0.5C
button.
Press RESET
51
E0.51
button.
Press RESET
17
E0.17
button.
Press RESET
17
E0.17
button.
Press RESET
53
E0.53
button.
Press RESET
51
E0.51
button.
Press RESET
16
E0.16
button.
Press RESET
44
E0.44
button.

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