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62-11637
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HIGH COMP DISCHARGE TEMP
• ACTIVATION: Discharge sensor alarm not active AND:
The ambient temperature is below 120°F (48.9°C) and discharge temperature is greater than 309°F
(154.4°C) for 3 minutes, or the ambient temperature is above 120°F (48.9°C) and discharge tempera-
ture is greater than 340°F (171.1°C) for 3 minutes, or the discharge temperature exceeded 350°F
(176.7°C).
• UNIT CONTROL: Shutdown and alarm.
• RESET CONDITION: Auto Reset after 15 minutes with the ambient temp below 120°F (48.9°C), when the
discharge temperature falls below 300°F (148.8°C); or auto reset after 15 minutes with the ambient temp
above 120°F (48.9°C) when the discharge temp falls below 330°F (165.4°C); 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.
If Alarm Occurs During Pretrip Test 14
Check compressor by performing a compressor test. Refer to
2.
Check Refrigerant
Charge
Refer to
3.
Check Airflow Through Radiator & Condenser
Coil
a. Inspect condenser & radiator. Ninety percent or more of the coil surface must be undamaged. Con-
denser/Radiator coil must be clean.
b. Check airflow (with unit running). Even airflow through the entire coil. No “dead” spots
c. Check upper and lower fan belt tension & condition. Verify no Glazing, no cracking, and no slipping.
Refer to
4.
Check System
Pressures
Install Manifold Gauge Set and check and compare compressor discharge & suction pressures with
those shown in Unit Data. Refer to
for instruction on comparison.
5.
Check
Compressor Discharge Sensor (CDT)
Refer to procedure for Alarm
00125 CHECK COMP DISCHARGE SENSOR
. Alarm condition must be cor-
rected and the alarm cleared to continue.
6.
If alarm occurred during Defrost, check
DTT
a. Visually inspect the mounting of DTT. Must be mounted tightly to the tube sheet, with the center screw
properly torqued. Ensure sensing side is in contact with the tube sheet. Refer to
.
b. Using a service (test) thermometer check temperature of evaporator tube sheet at DTT location and
compare actual temperature to the Unit Data reading. Must be within ±2°F (1°C).
7.
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.
8.
Check Compressor Cylinder Valves &
Gaskets
Remove compressor heads & inspect condition of cylinder suction valves, cylinder discharge valves &
gaskets. Must be in good condition. Install new parts and gaskets as required.
9.
Check System For Non-Condensables
Check refrigeration system for non-condensable gas(es). No Non-condensable gas(es) may be pres-
ent. Refer to
.
Summary of Contents for Transicold X4 7300
Page 21: ...62 11637 1 6 1 3 SAFETY DECALS ...
Page 22: ...1 7 62 11637 62 03958 ...
Page 23: ...62 11637 1 8 ...
Page 24: ...1 9 62 11637 ...
Page 119: ...62 11637 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
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