Page 53
6-13
SEALED SYSTEM DIAGNOSTIC INFORMATION
NOTES:
The temperature/pressure table below is for reference only. A unit's temperature/pressure correlation may differ
•
from those listed due to: variations in evaporator thermistor location, set-points, where the sealed system is in
the refrigeration cycle, ambient temperature, etc.
•
If a unit is experiencing temperature problems, it is recommended to reference the Error Code Troubleshooting
•
Guide and General Troubleshooting Guide before accessing the sealed system. After all mechanical and elec-
trical components have been ruled out, sealed system pressures can be checked and compared against those
listed in the tables below.
•
Whenever entering the sealed system, always use solder-on process valves. Do
NOT
use bolt-on process
•
valves as they are prone to leak.
•
Whenever servicing the sealed system, the refrigerant valve assembly (includes high-side filter-drier) must be
•
replaced.
NORMAL OPERATING PRESSURES
Model
UW-24
Normal Low Side Pressures
10 psig to 36 psig
Normal High Side Pressures
90 psig to 100 psig
PRESSURE INDICATIONS
If low side pressure is
NORMAL
LOW
LOW
HIGH
HIGH
& high side pressure is
NORMAL
LOW
HIGH
LOW
HIGH
possible problem is
MECHANICAL
(see General Troubleshooting Guide)
LEAK
RESTRICTION
INEFFICIENT COMPRESSOR
OVER CHARGE
#7040748 - Revision A - September, 2016
MODEL UW-24
MODEL UW-24
Troubleshooting Guides
