Carrier VECTOR 6500, Руководство по эксплуатации и обслуживанию

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Alarm
NO.
Steps Alarm/Cause Corrective Action
28 CHECK REFRIGERATION SYSTEM
•
TRIGGER ON: The compressor is running and the discharge pressure is less than 5 psig
(0.34 bar) higher than suction pressure for more than 10 minutes.
•
UNIT CONTROL: Engine Operation: alarm only or (if configured for shutdown) engine and unit
shutdown and alarm.
Standby Operation: alarm only or (if configured for shutdown) refrigeration
system shutdown and alarm with PSCON still energized.
•
RESET CONDITION: Auto reset when discharge pressure is more than 20 psig (1.36 bar) above the
suction pressure when in alarm only (for either trigger), or auto reset after Minimum Off Time
Functional Parameter setting when shutdown is configured 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 (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1 Verify Compressor Is Running.
Check compressor amp draw on all
three legs.
Readings must be in the range as shown in Section
2.11.
2 Check System Pressures
Install manifold gauge set and check
and compare compressor discharge
& suction pressures with those
shown on the microprocessor dis-
play.
Suction pressure must be above 3 psig (0.2 bar)
Discharge pressure must be more than 5 psig (0.3
bar) higher than the suction pressure.
Suction & Discharge Pressures must have the same
reading on gauges & on microprocessor display.
NOTE: Microprocessor suction (CSP) and evap-
orator (EVOP) pressure readings have a maxi-
mum value of 100 psig (7.5 bar) The actual suc-
tion pressure must be lower than 100 psig in or-
der to perform this test.
3 Perform Pretrip Check
Clear Active Alarm list, then run Pre-
trip & check for any new alarms.
Any active alarms must be corrected and cleared be-
fore proceeding.
4 Check Compressor.
a. Perform Pump-Down Test.
Refer to Section 8.7.1
Must hold a vacuum and not equalize in a short peri-
od of time
b. Cover condenser and build-up
discharge pressure.
Must be able to pump up to 400 psig (27.2 bar.)
c. Disassemble and inspect
compressor valve plates, reeds,
pistons, etc.
Must be intact, clean, and in good working order.