62-11637 7–12
00021 TECHNICIAN RESET REQUIRED
• ACTIVATION: The High Engine Temp Shutdown Configuration and/or Engine Oil Pressure Shutdown Con-
figuration is/are set to YES, and either Alarm 00011 - Low Engine Oil Pressure, or Alarm 00012 - High
Coolant Temperature has become active and shut the unit down three times within the past 2 hours.
• UNIT CONTROL: Shutdown and alarm.
• RESET CONDITION: Clear the alarm from inactive alarm list. This alarm and the alarm(s) that caused it
can not be reset by turning switch OFF and then 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. Determine Which Alarm Activated This Alarm.
a. Check active alarm list for Alarm 00011 LOW ENGINE OIL PRESSURE or 00012 HIGH COOLANT
TEMPERATURE. One of these alarms will be present.
b. Follow the troubleshooting steps for the alarm(s) found, and correct the alarm condition. All alarm
conditions must be corrected.
2. Reset Alarm
Clear all inactive alarms. Refer to Section 5.2.2. All alarms must be cleared to start unit.
00022 LOW SUCTION SUPERHEAT
• ACTIVATION: “Check Suction Temperature Sensor” and/or “Check Evaporator Temperature Sensor”
alarms are not active (refer to Alarm 000127 and/or 000131 first) and:
Compressor Suction Superheat (Compressor Suction Temperature (CST) minus saturated tempera-
ture for Compressor Suction Pressure (CSP) is less than 5°C (9°F) for more than 2 minutes.
• UNIT CONTROL: Shutdown and alarm.
• RESET CONDITION: Auto reset after 15 minutes, or 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, 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 System Pressures
Install manifold gage set and check and compare compressor discharge, suction and evaporator out-
let pressure to the Unit Data readings. Refer to Section 8.9.12 for instruction on comparison.
2. Check Evaporator Section
Check evaporator section, return air bulkhead, air chute, and the evaporator coil (for cleanliness and
airflow). Refer to Section 9.3.12.
3. Perform Pretrip Check
Clear Active Alarm list, then run Pretrip & check for any new alarms. Any active alarms must be cor-
rected and cleared before proceeding.
4. Check Expansion Valve (EVXV)
Check operation of EXVX. Refer to Section 8.9.9.
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