Riken Keiki GD-3EC, Technical Manual

Page: 139 / 177

9. Troubleshooting 9-2 Reading abnormalities
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Symptom/display
FAULT
lamp
Cause Action
Sudden environmental
changes Alarm indications may be issued by the product
due to sudden environmental fluctuations (e.g.,
temperature).
The product cannot be used in locations where
sudden environmental changes occur frequently.
The user should take appropriate measures.
The sensor sensitivity
has degraded. Replace with a new sensor.
The calibration gas
concentration is
inappropriate. Prepare the correct calibration gas.
The sensor sensitivity
has degraded. Replace with a new sensor.
System
abnormality
(E-9)
―
Clock abnormality Set the date and time.
Correction may not function correctly if the EC
sensitivity correction function is enabled.
If similar symptoms recur frequently, the internal
clock may be defective. Replace with a new
internal clock.
Contact Riken Keiki.
Outside operating
temperature
range
(E-27)
―
Ambient temperatures at
the location where the
product is installed are
outside the operating
temperature range. The product operating temperature range varies
with the specific detection principle. The product
cannot be used outside the operating
temperature range.
The user should take appropriate measures.
Sensor life
expiration
warning
(E-8)
―
The sensor is
approaching the end of
its service life. We recommend sensor replacement.
Contact Riken Keiki.
Sensor warning
(E-1)
―
Contact Riken Keiki.