62-11389
7−105
Alarm
NO.
Steps Alarm/Cause Corrective Action
242 DIS PRESS CALIBRATE ERROR
• TRIGGER–ON: There is an error in the Compressor Discharge Pressure Sensor Calibration value
stored in memory.
• UNIT CONTROL: Alarm Only.
• RESET CONDITION: Auto Reset when the Discharge Pressure Sensor is calibrated successfully,
or alarm may be manually reset via keypad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1 Check Discharge Pressure Reading
Check Discharge Pressure Reading. Must read valid data.
2 Calibrate Discharge Pressure Sensor
a. Calibrate Discharge Pressure
Sensor.
Calibration successful.
b. Discharge Pressure Sensor can not
be successfully calibrated and
alarm remains active.
Download and replace microprocessor. Refer to
Section 5.7.
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