Yokogawa GD40 Gas Density Detector - Manual (Page 173)

<11. INSPECTION AND MAINTENANCE>
11-4
IM 11T3E1-01E
11.2.2 Inspecting the Analyzer in a FAIL Status
IN GD402, the state of terminals 18 and 19 is changed from close to open if a FAIL status is
detected by the self-diagnostic function during measurement. In addition, the <FAIL> lamp on
the operation panel comes on and the message field shows an error number. If a FAIL status is
detected, take the corrective action given in Table 11.2.
Table 11.2 Corrective Actions when a FAIL Status Is Detected
Message
Shown
Failure Type Diagnostic Conditions Corrective Action
Message via
Communica-
tion
Err.01 Sensor oscillation
shutdown
Failure to detect
oscillation frequency from the
detector
Reset the power
supply.
Contact Yokogawa
service personnel.
FAULT SEN-
SOR
Err.02 Error in sensor’s
oscillation fre-
quency
Frequency F2 : out of
range from 1000 to 10000Hz
Frequency F4 : out of
range from 4000 to 10000Hz
Reset the power
supply.
Contact Yokogawa
service personnel.
OVER FRE-
QUENCY
Err.03 Error in sensor’s
temperature
Sensor’s failure to detect
temperature
Contact Yokogawa
service personnel.
FAULT TEMP
Err.04 A/D converter
failure
Failure in A/D converter Contact Yokogawa
service personnel.
FAULT A/D
Err.05 Memory failure Erroneous data in
EEPROM/EPROM/RAM
Contact Yokogawa
service personnel.
FAULT MEMO-
RY