Troubleshooting - Hitachi SRL Series Instruction Manual

Troubleshooting

● Use the following table for the proper corrective actions to any of the SRL air compressor alarms.
● When performing the troubleshooting, make sure to press the Stop switch, turn off the main power
supply and open all the valves so that no residual pressure remains.
● The inside of the air compressor may be extremely hot right after the operation. Therefore, wait at least
30 minutes before performing the troubleshooting.
Type of Problem
Power supply is turned off
Wires are broken
Phase reversal connection
Printed circuit board failure
Motor breaker trips ("E.CO." is
indicated on digital display)
Scroll head and/or electric motor
Electric Motor will
failure
not run
Excessive voltage drop-Improper
wire thickness
Power supply panel circuit breaker
has tripped
P o w e r s u p p l y p a n e l f u s e i s
damaged
Emergency stop switch has been
pressed
Leak in the internal air compressor
piping
Safety relief valve leaks
L o w d i s c h a r g e
Clogged and/or dirty intake air
pressure
filter
Check valve failure
Printed circuit board failure
H i g h d i s c h a r g e
pressure
Electromagnetic contactor failure
Improper installation
T r a n s p o r t f i x t u r e s w e r e n o t
removed
Rubber vibration isolators are
worn
Excessive noise is
T h e S R L r e v e r s e r o t a t e s f o r
longer than 3 seconds after it has
generated
stopped
Loose V-belt
Scroll head failure
Electric motor failure
Motor bearing has failed and/or
the seal has shows wear
Overheating of
the Electric Motor
Short Circuited Motor
WARNING
Probable Cause Corrective Action
Turn on the power supply.
Replace and/or fix the wiring.
Reconnect the wiring (see page 9).
Replace the printed circuit board (Please contact the local
Hitachi distributor).
Please contact the local Hitachi distributor to eliminate the
probable cause and reset the thermal relay.
Replace the scroll head and/or electric motor (Please
contact the local Hitachi distributor).
Replace with a properly sized wire.
Eliminate the cause of failure and reset the circuit breaker
(Please contact the local Hitachi distributor).
Replace the fuse.
Reset the emergency stop switch.
Re-tighten all of the air compressor pipe fittings.
Replace the safety relief valve.
Replace the intake air filter element.
Replace the check valve (Please contact the local Hitachi
distributor).
Replace the printed circuit board (Please contact the local
Hitachi distributor).
Replace the electromagnetic contactor (Please contact the
local Hitachi distributor).
Install the air compressor on level ground according to the
installation procedure on page 6.
Remove the transport fixtures (see page 4).
Replace the rubber vibration isolators (Please contact the
local Hitachi distributor).
Replace the check valve (Please contact the local Hitachi
distributor).
Re-tighten and/or replace the V-belt.
Replace the scroll head (Please contact the local Hitachi
distributor).
Replace the electric motor (Please contact the local Hitachi
distributor).
Replace the electric motor (Please contact the local Hitachi
distributor).
Replace the electric motor (Please contact the local Hitachi
distributor).
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