62-11785 7–6
00017 HIGH COMP DISCHARGE TEMP
• ACTIVATION: “Check Compressor Discharge Sensor” alarm not active (if alarm is active, refer to 00125
CHECK COMP 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: 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 appropriate modes to see
if any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check Airflow Through Condenser Coil
a. Inspect condenser. 90% or more of the coil surface must be undamaged. No “dead” air spaces.
Condenser coil must be clean (refer to Section 8.7.2).
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 out properly.
2. Check LIV, CSMV, EVXV and ECXV - Clear Active Alarm list, then run Pretrip & 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 8.5.2.
Generally, level should be between upper & 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 &
suction pressures with those shown on the microprocessor display. Suction & Discharge Pressures must
have the same reading on gauges & on microprocessor display. Pressures must be in the normal range
for ambient & refrigerated compartment temperature conditions.
5. Check Compressor - Check compressor for excessive vibration or noise. Replace compressor. Refer to
Section 8.6.
6. Check System For Non-Condensables - Check refrigeration system for noncondensable gas(es). No
non-condensable gas(es) may be present. Refer to Section 8.5.2.
To Next Page
Loading...
Need help?
General
