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62-11039
7-89
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
P178 CHECK UL1
•
TRIGGER–ON: The pressure differential between suction and discharge pressures did not change as
expected when the UL1 (Front/Rear) Unloader was de-energized/loaded (discharge pressure should rise
and suction pressure should drop) or when it was energized/unloaded (discharge pressure should drop
and suction pressure should rise
and suction pressure should rise.
•
UNIT CONTROL: Engine and standby operation: Pretrip will fail and display “PRETRIP FAIL AND
COMPLETED”.
•
RESET CONDITION: Auto Reset if pre--trip mode is started again, 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, clear the
alarm(s). (See Note 1) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue
with the steps below as necessary.
1.
Check wiring to DPT & SPT
a. Verify that correct wires are
connected to each transducer
Plugs to transducers are the same. The correct wire plug
must be connected to the proper transducer.
2.
Check for Check UL1 Alarm
a. Check for alarm 85 or P144
Alarm conditions must be corrected and the alarm cleared
to continue
3.
Confirm Compressor Suction Pressure Transducer Is Working
a. Check CSP
Attach manifold gauge set and compare CSP reading from
microprocessor display.
Repair and Replace if required.
P180 CHECK SUCTION MOD VALVE
•
TRIGGER–ON: After microprocessor attempts to close CSMV, suction pressure fails to drop below
4in. Hg (--0.14 Bar)
•
UNIT CONTROL: Engine and standby operation: Pretrip will fail and display “PRETRIP FAIL IN TEST
•
UNIT CONTROL: Engine and standby operation: Pretrip will fail and display “PRETRIP FAIL IN TEST
11”.
•
RESET CONDITION: Auto Reset if pre--trip mode is started again, 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, clear the
alarm(s). (See Note 1) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue
with the steps below as necessary.
1.
Check Compressor Operation
a.Close suction service valve
Check to see if compressor is capable of pulling a
vacuum. During test, do not stay in a vacuum longer than
2 minutes. Vacuum should read --4.13--in. Hg (–0.14 Bar)
If compressor will not pump down, repair or replace
compressor.
2.
Check Suction Modulating Valve
a.Check CSMV operation using check out
procedure (See Section 8.23.2)
Must perform correctly.
3.
Check Suction Modulating Valve (With Good Compressor)
a.Inspect CSMV
Check to see if coil is operating per Section 8.23.1
b.Inspect
component
and
wire
connections
No damage to coil
No damaged or corroded pins
c.Check the CSMV electrical system
Remove and replace piston and coil assembly if required
See Section 8.23.1
Summary of Contents for VECTOR 1800 MT
Page 1: ......
Page 2: ...OPERATION SERVICE MANUAL for VECTOR 1800 MT Trailer Multi Temp Refrigeration Units ...
Page 19: ...1 5 62 11039 1 3 SAFETY DECALS ...
Page 20: ...1 6 62 11039 62 03958 00 Heat Warning 62 03957 01 High Voltage 62 60280 00 Standby Safety ...
Page 21: ...1 7 62 11039 ...
Page 303: ...10 1 62 11039 ...
Page 310: ...10 8 62 11039 BASED ON ENGINEERING SCHEMATIC 62 60926 REV G NEXT SHT ...
Page 311: ...10 9 62 11039 FROM PREVIOUS SHT ...