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A1.3
Fault
Airend Inlet
Temperature is
shorted, check
sensor wiring
Inlet temperature sensor
is faulty or the wiring to
the sensor is shorted.
Using the wiring schematic for the machine,
locate the inlet temperature sensor connection to
the controller. Check for any shorted wires at the
connector. Inspect the cable for damage between
the controller and the sensor. Remove the cable
connector from the sensor and use a multi-meter
to check the resistance of the sensor and ensure
that it is not shorted. It is possible that the sensor
may read within range at room temperature but
still be faulty once exposed to an elevated
temperature or vibration. Replace or repair the
wiring or sensor depending on the results of the
findings.
A1.4
Fault
Airend Inlet
Temperature is
Open, check
sensor wiring
Inlet temperature sensor
is faulty, the wiring to the
sensor is broken, or the
wiring or connector is
disconnected.
Using the wiring schematic for the machine,
locate the inlet temperature sensor connection to
the controller. Check for disconnected wires,
plugs, or loose connections. Inspect the cable for
damage between the controller and the sensor.
Remove the cable connector from the sensor and
use a multi-meter to check the resistance of the
sensor and ensure that it is not open (very high
resistance). It is possible that the sensor may
read within range at room temperature but still be
faulty once exposed to an elevated temperature
or vibration. Replace or repair the wiring or
sensor depending on the results of the findings.
A1.5
Fault
Airend
Discharge
Temperature
Input is below
the Fault Limit
Airend discharge
temperature is too low to
start or run the machine.
Check site conditions and increase the ambient
temperature around the airend.
A1.5
Warning
Airend
Discharge
Temperature
Input is below
the Warning
Limit
Airend discharge
temperature is
approaching the
minimum value to be
able to start or run the
machine.
Check site conditions and increase the ambient
temperature around the airend.
A1.6
Fault
Airend
Discharge
Temperature
Input is above
the Fault Limit.
Airend discharge
temperature has
exceeded the fault limit.
The machine has been
stopped to prevent
damage.
Check the temperature fault setting to ensure that
it is not set too close to the normal operating
range of the machine. Check site conditions for
elevated ambient temperature. Check the
condition of compressor cooling functions such as
thermal mixing valve and cooler. Check oil
condition and oil level. Examine airend for issues.
Review history of compressor discharge
temperature using the controller trends, data logs,
or site maintenance log. A slowly increasing trend
of the temperature may indicate overdue
maintenance such as cooler cleaning, while a
sharp increase may indicate a malfunction.
Perform adjustments, cleaning, or repair based
on the results of the investigation.