Alarm Code #333 ( Optional Code )
Model CPE52, 53, 14, 15, 15V, 16
Failure Air differential pressure transducer (
APT ) failure
Countermeasure
<< Cause -(1) >>
Defective APT
< Check > ( Refer to Page F-27 )
• Select “ DISPLAY ” on the test mode and turn off all contactor
relays to put to the
state of all loads off.
Check if the APT pressure value displayed on the personal
computer, the LED or the LCD indicates
more than approx. 50Pa ( Abnormal ).
• Compare the sensor DC output voltage between 1(GRN) – 2(WH) of
CN32
and the above APT pressure value.
< Relation between output voltage and pressure >
Sensor DC output voltage (V) = { 0.008158 × Pressure (Pa) + 1 } ± 0.08
< Action >
Out of Allowable Range : Replace APT.
(Note) To cancel the error display
only, turn OFF the dip switch SW1 - 8 as an emergency method.
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