This guide discusses frequently-seen malfunctions but does not discuss all malfunctions. If the detector shows a symptom which is not explained in this manual, or if it still has malfunctions even though remedial actions are taken, please contact RKI.
NOTE
To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual.
<Device Abnormalities>
Symptom/Display FAULT Causes Actions
Detector does not
turn ON
-
The power switch is turned off. Turn ON the power switch.Abnormalities/momentary blackout of power supply system.
Provide the rated voltage.
Check the UPS, power supply line filter and insulation transformer, and then take additional measures.
Improper installation of the main unit.
Ensure the main unit is properly attached to the mounting plate.
Cable abnormalities (open circuit/not connected/short circuit).
Check the detector’s wiring and the wiring of connected devices.
Abnormal
Operations
○
Disturbances by sudden surge noise, etc.Turn off and restart the detector.
If such a symptom is observed frequently, take appropriate measures to eliminate the noise.
Incorrect Flow Rate Indicator (Specified Value Display does not correspond to 0.5 L/min.)
○
Improper flow rate default set. Use a flow meter to perform the flow rate default set again as described on page 111.If such a symptom is observed frequently, the flow sensor is malfunctioning and must be replaced. Please contact RKI.
Sensor Unit Abnormalities E-1 SENSOR
●
The sensor unit is not connected or improperly connected.Check whether the sensor unit is connected and the connectors of the unit are securely fastened.
Errors in communication with the sensor unit.
Replace the sensor unit as described on page 112.
Zero drift caused by environmental changes or aging degradation cannot be corrected using the zero follower.
Perform a zero adjustment.
If the symptom continues, replace the sensor unit as described on page 112.
For ESU type sensors, the battery inside the sensor is dead.
Replace the battery inside the sensor unit as described on page 112.
Faults inside of the sensor unit.
Replace the sensor unit as described on page 112.
●: Lamp on
○: Lamp off
Symptom/Display FAULT Causes Actions
Flow Rate Warning
FLOW
○
Unstable flow caused by adeteriorated pump.
Replace the pump unit as described on page 114.
Unstable flow caused by clogged dust filter.
Replace the dust filter as described on page 114.
Unstable flow caused by bent or clogged inlet or exhaust line.
Fix the defective parts.
Pressure difference is present in the sampling condition.
(The flow rate is ensured even though the pump drive level is low.)
In some sampling conditions (presence of pressure difference between IN and OUT), the flow rate is ensured even though the pump drive level is low.
Although the detector can be used in such a situation, the diagnosis function of its pump drive level issues this message. You can disable this function to eliminate the message. (See "7-2.
Maintenance Mode".)
Check the operating conditions before taking actions.
* If the flow rate indicator is incorrect, the message may be displayed even though pressure difference is not present.
Flow sensor is malfunctioning. The flow rate may not be in the range of 0.5 L/min±10% even though the flow rate indicator indicates the specified value.
The flow sensor must be replaced. Contact RKI.
Flow Rate Abnormalities E-5 FLOW
●
Protective rubber caps have not been removed.Remove the protective rubber cap from the GAS IN and GAS OUT fittings.
Broken pump unit. Replace the pump unit as described on page 114.
Flow loss caused by clogged dust filter.
Replace the dust filter as described on page 114.
Flow loss caused by bent or clogged inlet or exhaust tube.
Fix the defective parts.
Open circuit or defective connection of flow sensor.
Please contact RKI.
Communication Abnormalities E-6
(NT specification)
○
Communication cable abnormalities.Check the detector wiring and the wiring of connected devices.
Address abnormalities. Set the address again.
Disturbance by external noise. Turn off and restart the detector.
If such a symptom is observed frequently, take appropriate measures to eliminate the noise.
Clock Abnormalities
E-9
○
Abnormalities of the clockinside the detector.
Set the Date/Time in Maintenance Mode. Note that when the sensitivity correction function of ESU is used, correction may not be made properly.
If such a symptom is observed repeatedly, the built-in clock must be replaced. Contact RKI.
System Abnormalities E-9 SYSTEM
●
The rated voltage is not supplied to the detector.Check the power supply, and supply the rated voltage.
Abnormalities of ROM, RAM, or EEPROM inside of the detector.
Please contact RKI.
<Reading Abnormalities>
Symptoms Causes Actions
The reading rises (drops for oxygen) and stays there.
Drifting sensor. Perform a zero adjustment (AIR adjustment).
Presence of interference gas. Disturbances by interference gases, such as solvents, cannot be eliminated completely. For information on actions, such as installing a removal filter, please contact RKI.
Slow leak. A very small amount of the gas to be detected may be leaking (slow leak). Because ignoring it may cause dangers, take a remedial measure, i.e., taking actions the same as those for the gas alarm.
Environmental changes. Perform a zero adjustment (AIR adjustment).
In particular, the galvanic cell type is affected by the air pressure.
A gas alarm is triggered even though gas is not present.
Presence of interference gas. Disturbances by interference gases, such as solvents, cannot be eliminated completely. For information on actions, such as installing a removal filter, please contact RKI.
EMI/RFI noise. Turn off and restart the detector.
If such a symptom is observed frequently, take appropriate measures to eliminate the noise.
Sudden change in the environment.
When the environment (temperature, etc.) changes suddenly, the detector cannot adjust to it. In some cases, the detector triggers an indication alarm.
Because the detector cannot be used under sudden and frequent environmental changes, you must take any preventive actions to eliminate them.
Slow Response Clogged dust filter. Replace the dust filter as described on page 114.
Bent or clogged inlet or exhaust line.
Fix the defective parts.
Condensation in the inlet line.
Fix the defective parts.
Deteriorated sensor sensitivity.
Replace the sensor unit as described on page 112.
Cannot Calibrate Improper calibration gas concentration.
Use the proper calibration gas.
Deteriorated sensor sensitivity.
Replace the sensor unit as described on page 112.