7–11 62-12259
00017 High Compressor Discharge Temp
• ACTIVATION: “Check Compressor Discharge Sensor” alarm not active (if alarm is active, refer to 00125
Check Compressor Discharge Sensor first) and: discharge temp rises above 285.1°F (140.6°C) for 30
seconds, or discharge temp rises above 295.0°F (146.1°C).
• UNIT CONTROL: Engine Operation: Shutdown and alarm.
Electric Operation: Refrigeration system shutdown and alarm with PSCON still
energized.
• RESET CONDITION: Auto Reset after 15 minutes when discharge temp falls below 266°F (130.0°C) 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 (refer to reset condition above). Operate the unit through the appro-
priate modes to see if any active alarm occurs. Continue with the steps below as necessary.
Corrective Actions:
1. Check Airflow Through Radiator / Condenser Coil
a. Inspect condenser / radiator fins. Fins must be straight. 90% or more of the coil surface must be
undamaged. No “dead” air spaces. Condenser / Radiator coil must be clean (refer to Section
8.5.11).
b. Check condenser airflow. Even airflow through the entire coil, with no “dead” spots.
c. Check condenser fan rotation / operation. Fans should operate correctly. Air should be drawn in
through the grill, and directed into the engine compartment.
2. Check LIV, CSMV, EVXV and ECXV - Clear Active Alarm list, then run Pretrip and check for any new
alarms. Any active alarms must be corrected and cleared before proceeding.
3. Check for Low Refrigerant Charge - Check refrigerant level in the receiver. Refer to Section 8.6.2.
Generally, level should be between upper and lower sight glasses with a refrigerated compartment tem-
perature of 35°F (1.0°C) or lower.
4. Check System Pressures - Install manifold gauge set and check and compare compressor discharge
and suction pressures with those shown on the microprocessor display. Suction and Discharge Pres-
sures must have the same reading on gauges and on microprocessor display. Pressures must be in the
normal range for ambient and refrigerated compartment temperature conditions.
5. Check Compressor - Check compressor for excessive vibration or noise. Replace compressor. Refer to
Section 8.7.
6. Check System for Noncondensable - Check refrigeration system for noncondensable gas(es). No non-
condensable gas(es) may be present. Refer to Section 8.6.2.
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