Carrier VECTOR 6500 Operation & Service Manual page 146

Alarm
Steps
NO.
18 LOW REFRIGERANT PRESSURE - Continued
7 Check Evaporator Sections
a. Check evaporator section, return
air bulkhead, air chute & cleanli-
ness of evap. coil.
b. Check airflow (with unit running.)
8 Visually Inspect Unit
Visually inspect unit for damage to
the liquid line causing a restriction or
any signs of temperature drop at the
filter-drier.
9 Check Electronic Expansion Valve (EVXV)
Check operation of EVXV.
Alarm/Cause
7−13
Corrective Action
Good Air Flow.
Return air not restricted.
Air chute in good condition.
No damage to evaporator fan motor assemblies.
Evap. coil clean.
Evap. fan rotation ok.
Even airflow through the entire coil.
No "dead" spots.
All tubing from the receiver to the evaporator section
is in good condition
There is no temperature drop at the drier or any-
where on the liquid line
Refer to Section 8.8.6.
62-11389