Sub-Zero 700-3 BASE, Technical & Service Manual

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Troubleshooting Guides
Integrated
(700-
3
BASE)
Series
8-16
#3758424 - Revision B - December, 2005
700BR-3 X” vacuum to X psi XX psi to XXX psi
700BF/I-3 3” vacuum to 2 psi 90 psi to 120 psi
SEALED SYSTEM TROUBLESHOOTING / DIAGNOSTICS TABLES
Before tapping into the sealed system to check pressures, see General Troubleshooting Guide, taking note of prob-
lems “A” through “J”, and if applicable, be sure to reference the “Pointers” in the first column. By initiating Diagnostic
Mode and observing evaporator temperatures, it may be determined unnecessary to tap the sealed system. If need-
ed, the table on the following page provides a quick reference for temperature/pressure correlation.
NOTE: If entering the sealed system to check pressures, always use solder-on process valves. Do NOT use bolt-
on process valves as they are prone to leak.
NOTE: Whenever servicing the sealed system, the high-side filter-drier must be replaced.
NORMAL OPERATING PRESSURES
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
Model Normal Low-Side Pressures Normal High-Side Pressures
700BC/I-3 3” vacuum to 2 psi 90 psi to 120 psi