7–55
62-11637
P00165
CANNOT PUMP DOWN
• ACTIVATION: With SV1, SV2, & SV4 in the closed position, the compressor is not able to pull the low side
of the refrigerant system down to 10 PSIG (0.68 bar).
• UNIT CONTROL: Pretrip will abort and “PRETRIP FAILED IN TEST 12, 13 or 14” will be displayed in Mes-
sageCenter.
• RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis-
play 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, clear the
alarm(s). (Refer to Note 1 in
Section, page 7-2.) 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 Compressor Drive Coupling
Verify that compressor coupling is intact and the compressor crankshaft is turning. Repair as required.
2.
Check System Pressure
Check and compare compressor discharge & suction pressures with those shown in unit data. Refer
to
for instruction on comparison.
3.
Manually Check Refrigeration System
Perform a low side pump down, refer to
step d. Suction pressure must drop to at least 0
psig. If this check does not pass, continue to Check Compressor Pumpdown.
4.
Manually Test Refrigeration System
See Refrigeration Troubleshooting,
, for “System Will Not Pump Down”. Must pass all
tests.
P00174
CHECK LOW SPEED RPM
• ACTIVATION:
in Test #7: With the CAN calling for low speed, engine speed is NOT between: 1200 and 1500 rpm.
in Test #9: 15 seconds after the high speed test, engine rpm has not dropped from the high speed test to
1200 to 1500 rpm.
• ACTIVATION
in Test #9: 15 seconds after the High Speed Pretrip Test #8, engine speed has NOT dropped back to the
low speed range (within 15 seconds) as shown above.
NOTE
This test will be skipped if the engine speed sensor alarm (A00130) is active.
• UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.
• RESET CONDITION: Auto reset if Pretrip is started again or alarm may be manually reset using the dis-
play 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, clear the
alarm(s). (Refer to Note 1 in
Section, page 7-2.) 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 Low Speed Operation
Refer to procedure for alarm
. Alarm condition must be corrected
and the alarm cleared to continue.
Содержание Transicold X4 7300
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