62-11389
7−13
Alarm
NO.
Steps Alarm/Cause Corrective Action
18 LOW REFRIGERANT PRESSURE - Continued
7 Check Evaporator Sections
a. Check evaporator section, return
air bulkhead, air chute & cleanli-
ness of evap. coil.
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.
b. Check airflow (with unit running.) Even airflow through the entire coil.
No “dead” spots.
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.
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
9 Check Electronic Expansion Valve (EVXV)
Check operation of EVXV. Refer to Section 8.8.6.
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