62-11640 7–88
03001 ENGINE LOAD CALIBRATION
• ACTIVATION: Activate alarm if:
Condition 1 = At engine start if the engine throttle sensor (Rack Position Sensor) value is less than
90%.
Condition 2 = After start if the sensor value does not drop below 90% within 5 seconds.
Condition 3 = At engine shutoff if the sensor value does not drop below 10% within 5 seconds.
• UNIT CONTROL: Alarm only. Control system will modulate CSMV and activate Economizer Control as
required.
• RESET CONDITION: Alarm may be manually reset using the display mounted keys 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, clear the
alarm(s). (Refer to Note 1 in Notes Section, page 7-2.) Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check Sensor Power And Wiring
a. Inspect sensor, connector pins & terminals. No physical damage to sensor. No damaged or corro-
sion in connections.
b. If required, power sensor by placing the unit in PC Mode, check for power. Voltage reading
between connector position 1 (positive) and position 2 (negative) should be 5 volts DC. Check
connectors and wiring between terminals for damage, moisture or corrosion.
c. Check for continuity from connector terminal 3 to ENCU−7. If good continuity is not present, check
connectors and wiring between terminals for damage, moisture or corrosion.
2. Replace Rack Position Sensor
Replace sensor with known good component. Calibrate sensor and ENCU. Refer to Section 8.5.13
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