Page 69
SEALED SYSTEM DIAGNOSTIC INFORMATION
NOTE: The temperature/pressure table at right is for refer-
ence only. A unit's temperature/pressure correlation may
differ from those listed due to: variations in evaporator ther-
mistor location, set-points, where the sealed system is in
the refrigeration cycle, ambient temperature, etc.
If a unit is experiencing temperature problems, it is recom-
mended to reference the Error Code Troubleshooting Guide
and General Troubleshooting Guide before accessing the
sealed system. After all mechanical and electrical compo-
nents have been ruled out, sealed system pressures can
be checked and compared against those listed in the tables
below.
NOTE: Whenever entering the sealed system, 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 valve
assembly (includes high-side filter-drier) must be replaced.
NORMAL OPERATING PRESSURES
Model
ICBWS-30
Normal Low Side Pressures
10 psi to 36 psi
Normal High Side Pressures
90 psi to 100 psi
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
Pressure
10” Vac / -.69 Bar
7” Vac / -.48 Bar
4” Vac / -.28 Bar
0” Vac / 0 Bar
2 Psi / .14 Bar
4 Psi / .28 Bar
7 Psi / .48 Bar
9 Psi / .62 Bar
12 Psi / .83 Bar
15 Psi / 1.03 Bar
18 Psi / 1.24 Bar
22 Psi / 1.51 Bar
26 Psi / 1.79 Bar
30 Psi / 2.07 Bar
35 Psi / 2.41 Bar
40 Psi / 2.76 Bar
45 Psi / 3.10 Bar
51 Psi / 3.52 Bar
57 Psi / 3.93 Bar
64 Psi / 4.41 Bar
71 Psi / 4.90 Bar
78 Psi / 5.38 Bar
Temperature
-30°F / -34°C
-25°F / -32°C
-20°F / -29°C
-15°F / -26°C
-10°F / -23°C
-5°F / -21°C
0°F / -18°C
5°F / -15°C
10°F / -12°C
15°F / -9°C
20°F / -7°C
25°F / -4°C
30°F / -1°C
35°F / 2°C
40°F / 4°C
45°F / 7°C
50°F / 10°C
55°F / 13°C
60°F / 16°C
65°F / 18°C
70°F / 21°C
75°F / 24°C
TEMPERATURE / LOW-SIDE PRESSURE CORRELATION
7-13
#7013455 - Revision A - April, 2009
Troubleshooting Guides
International W
International W
ine Storage
ine Storage
(ICBWS)
(ICBWS)
Series
Series
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