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5. Malfunction Protection of Sensor
When pressure sensor or temperature sensor is disconnected, the controller would be stopped
for warning. The on-site failure is displayed as "**SENSOR FAULT".
8. Removal of Common Failures
1. Failures Review
When a fault occurs, the controller in the main interface displays the current fault content. For
example, when the pressure sensor failure, it displays the following interface:
STOP:
P SENSOR FAULT
2. Common Failures and Causes
Failure
Air Exhaust
Temperature
too high
Temperature
Sensor Failure
Over Pressure
Pressure
Sensor Failure
Lack Phase
Overloaded
Unbalance
Rotor Lock
Short Circuit
Wrong Phase
Sequence
Overload or
Rotor locking
during starting
process
Reason
Bad vent condition, Oil lacking
etc.
Cable off or PT1OO damaged
The pressure too high or the
pressure sensor failure
Cable off, Sensor damaged or the
cable connected reversed
Power
phase
lacking
Contactor terminal damaged
Voltage too low, tubes blocked,
Bearing
Wear
off
mechanical failure or wrong set
data etc.
Power
unbalance,
damaged or the internal open of
the motor
Voltage too low, tubes blocked,
Bearing
Wear
off
mechanical failure or wrong set
data etc.
Wrong
Wiring,
Incorrect
setting etc.
Reversed Phase sequence or
phase off
Host start time set to a valueless
than the star angel time delay
Check
lubricant amount etc.
Checking the wiring and PT100
Check the pressure and the pressure
sensor
Check
transformer
or
the
Check the power and contactors
or
other
Check the set data, Voltage, bearings,
tubes and other mechanical system.
Contactor
Check the power, contactors and the
motor
or
other
Check the set data, Voltage, bearings,
tubes and other mechanical system.
Data
Checking the wiring and set the data
correctly
Check the wiring
Reset the host starting time to be
longer than star angel delay + Load
delay time
Disposal method
the
vent
condition
the
wiring
and
and
sensor
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