7–13
62-11637
00027
HIGH SUCTION PRESSURE
• ACTIVATION: The refrigeration system is running and the suction pressure has been greater than 98 psig
(6.7 bar) for more than 10 minutes.
• UNIT CONTROL: Alarm only or (if configured for shutdown) engine and unit shutdown and alarm.
• RESET CONDITION: Auto reset when suction pressure is less than 75 psig (5.1 bar) for 5 minutes and
configured for Alarm Only, or Auto Reset after 15 minutes if configured as a Shutdown Alarm 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 System
Pressures
Install manifold gauge set and check and compare compressor discharge & suction pressures with
those shown in Unit Data. Suction pressure must be above 3 psig (0.2 bar) and should be in the nor-
mal range for ambient & refrigerated compartment conditions. Refer to
.
2.
Check Compressor Drive
Coupling
Verify that compressor coupling is intact and the compressor crankshaft is turning. Repair as required.
3.
Check Refrigerant
Charge
Refer to
4.
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.
5.
Check
Compressor
a. Perform Pump-Down Test. Refer to
. Must hold a vacuum and not equalize in a short
period of time.
b. Cover condenser and build-up discharge pressure. Must be able to raise pressure to 400 psig (27.2 bar).
c. Disassemble and inspect compressor valve plates, cylinder suction valves, cylinder discharge valves
and pistons, etc. Must be intact, clean, and in good working order.
6.
Check Expansion Valve
(EVXV)
a. Visually inspect valve. Check coil is seated properly.
b. Check valve. 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 ...
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Page 119: ...62 11637 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
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