MCOCW Sensor
Device
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of dampers,
sensors, air directions, etc.)
xx yy
z
48 01
4
Supply air duct temper-
ature sensor discon-
nected
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 02
4
Supply air duct temper-
ature sensor short-
circuited
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 05
4
Supply water pipe tem-
perature sensor on wa-
ter cooling coil discon-
nected
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 06
4
Supply water pipe tem-
perature sensor on wa-
ter cooling coil short-
circuited
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 07
4
Return water pipe tem-
perature sensor on wa-
ter heating coil discon-
nected
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 08
4
Return water pipe tem-
perature sensor on wa-
ter heating coil short-
circuited
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 09
4
Return water pipe ex-
ternal temperature sen-
sor on water heating
coil disconnected
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
48 10
4
Return water pipe ex-
ternal temperature sen-
sor on water heating
coil is short-circuited
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
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Alarms
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Summary of Contents for EXact2 VEX240 series
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