9 Troubleshooting 9 Troubleshooting
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9
9
Troubleshooting
The Troubleshooting does not explain the causes of all the malfunctions which occur on the monitor. This
simply helps to find the causes of malfunctions which frequently occur.
If the monitor shows a symptom which is not explained in this manual, or still has malfunctions even though
remedial actions are taken, please contact RIKEN KEIKI.
Symptom/Display
Causes
Actions
The power cannot
be turned on.
The power switch is
turned off.
Turn on the power switch.
Abnormalities/momentary
blackout of power supply
system
Provide the rated voltage.
Take measures such as checking or adding the
UPS, power supply line filter and insulation
transformer.
The main unit is not
installed properly.
Check whether the main unit is properly attached to
the wall-mounted unit.
Cable abnormalities
(open circuit/not
connected/short circuit)
Check the wiring of the monitor and related devices
around it.
The batteries are dead.
*Only for the dry battery
type
Replace the two dry batteries.
Abnormal
operations
Disturbances by sudden
surge noise, etc.
Turn off and restart the monitor.
If a symptom like this is observed frequently, take
appropriate measures to eliminate the noise.
Sensor
abnormalities
E-1
The sensor is not
connected or improperly
connected.
Check that the sensor is connected and the
connectors of the sensor unit board are securely
fastened.
Errors in communication
with the unit
Replace the sensor unit board with a new one.
System
abnormalities
E-9 SYSTEM
The rated voltage is not
supplied to the monitor.
Check the power supply, and supply the rated
voltage.
Abnormalities of ROM,
RAM or EEPROM inside
the monitor
Please contact RIKEN KEIKI.
The reading drops
and it remains so.
Drifting of sensor output
Perform the air calibration.
Presence of interference
gas
Disturbances by interference gases, such as
solvents, cannot be eliminated completely. For
information on actions, such as removal filter,
please contact RIKEN KEIKI.
Environmental changes
Perform the air calibration. In particular, the
galvanic cell type is affected by the air pressure.
An oxygen
deficiency alarm is
triggered despite of
no abnormalities at
Presence of interference
gas
Disturbances by interference gases, such as
solvents, cannot be eliminated completely. For
information on actions, such as removal filter,
please contact RIKEN KEIKI.
