Riken Keiki GD-84D-EX Series, Operating Manual

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10. Troubleshooting 10-1 Product abnormalities
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<Flow abnormalities>
If the category is "fault alarm", the fault lamp (FAULT) either lights or flashes.
Category
Symptom/Display
(Fault code)
Cause Corrective action
Fault
Alarm
E-51 FLOW
The protective rubber
caps are still attached. Remove the protective rubber caps attached to GAS
IN and GAS OUT.
Pump failure Replace the pump unit.
Flow loss due to
clogged dust filter
Replace the dust filter.
Flow loss due to bent
or blocked inlet or
outlet tube.
Fix the problem.
The sensor is not
connected or
connected improperly.
Check to confirm that the sensor is properly attached
and that the sensor connector is connected properly.
E-52 F SENS 1 Flow sensor wire
breaks or faulty
connection.
Contact our sales department.
E-53 F SENS 2
Warnings
Display
E-50 FLOW
Flow instability due to
impaired pump
performance
The pump (and pump performance) may be
degraded.
Gas detection can still be performed in this state.
However, you should replace the pump unit as soon
as possible.
Flow instability due to
clogged dust filter
Replace the dust filter.
Flow instability due to
bent or blocked inlet or
outlet tube
Fix the problem.
E-56 PATH
Improper installation of
the chamber unit,
knurled screws not
tightened properly
Fasten the chamber unit properly.
The chamber switching
unit is not at the proper
position.
Return the chamber switching unit to the [D]
(detection mode) position.
Blockage in one of the
flow passages
Fix the problem.
E-58 F SENS 1
An abnormality was
discovered during
routine flow sensor
diagnostics.
The flow sensor performance may be degraded.
Degradation of the flow sensor may result in false
readings (i.e., the flow may be outside the stipulated
range of 0.6 L/min ± 10% (0.54 - 0.66) even if the
displayed flow is the stipulated value.
It is still possible to detect gases as long as no other
fault alarm such as flow loss occurs. Note that you
must replace the flow sensor to clear this warning.
Contact our sales department.
E-59 F SENS 2
-
The difference
between the flow
measured on the
main unit and the
actual flow is beyond
specifications.
(0.6 L/m ± 10%
(0.54 - 0.66))
Improper flow default
setting
The default setting for flow on the main unit may be
incorrect.
Use a flowmeter to set the default flow.
(Refer to ‘7-6-3 Correcting the flow value (DEF
FLOW)’.)
Frequent occurrence of these symptoms may
indicate a defective flow sensor. Replace the sensor.
Contact our sales department.