Carrier Vector 1550-11 - Page 129

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7-13
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
18 LOW REFRIGERANT PRESSURE (Continued)
7
Check CSMV
a. Check compressor suction modu-
lation valve.
Refer to procedure "How To Check CSMV", Section
8.6.7.
8
Check Evaporator Section
a. Check evaporator section, return
air bulkhead, air chute, cleanliness
of evap. coil and airflow.
Refer to Section 9.4.10
9
Visually Inspect Unit
a. Visually inspect unit for damage to
the liquid line causing a restriction
or any signs of temperature drop at
the drier.
All tubing from the receiver to the evaporator section is
in good condition
There is no temperature drop at the drier or anywhere
on the liquid line
10
Check Evaporator Expansion Valve (EVXV)
a. Check operation of valve.
Refer to Section 8.6.8