Wolf Sub-Zero ICB400 Series Service Manual page 109

TroubleShoot Guide
SEALED SYSTEM DIAGNOSTIC INFORMATION
NOTES:
• The temperature/pressure table at right and the normal
operating pressures listed below are for reference only.
A unit's temperature/pressure correlation and normal
operating pressures 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, gauge calibration, etc.
• If a unit is experiencing temperature problems, it is rec-
ommended to reference the Error Code Troubleshooting
Guide and General Troubleshooting Guide before
accessing the sealed system. After all mechanical and
electrical components have been ruled out, sealed sys-
tem pressures can be checked and compared against
those listed in the tables below.
• Whenever entering the sealed system, always use sol-
der-on process valves. Do NOT use bolt-on process
valves as they are prone to leak.
• Whenever servicing the sealed system, the valve assem-
bly (includes high-side filter-drier) must be replaced.
• Pressures listed below are based on a 21°C (70°F)
Ambient and and 3°C (38°F) set-points.
NORMAL OPERATING PRESSURES at 21°C (70°F) Ambient / 3°C (38°F) Set-Point
Model
ICB424
ICB427
(Wine)
ICB427R
(Ref)
If low side pressure is
NORMAL
LOW
LOW
HIGH
HIGH
7011544 - Revision A - November, 2008
International W ine Storage
International W ine Storage
Normal Low Side Pressures
0-0.83 BAR to 2.07-3.10 BAR
0-0.83 BAR to 2.07-3.10 BAR
0-0.83 BAR to 2.07-3.10 BAR
0-0.83 BAR to 2.07-3.10 BAR
PRESSURE INDICATIONS
& high side pressure is
NORMAL
LOW
HIGH
LOW
HIGH
7-18
Series
Series
(ICB400)
(ICB400)
Temperature
-34°C (-30°F) -.69 Bar (10" Vac)
-32°C (-25°F) -.48 Bar (7" Vac)
-29°C (-20°F) -.28 Bar (4" Vac)
-26°C (-15°F) 0" Bar (0 Vac)
-23°C (-10°F) .14 Bar (2 Psi)
-21°C (-5°F) .28 Bar (4 Psi)
-18°C (0°F) .48 Bar (7 Psi)
-15°C (5°F) .62 Bar (9 Psi)
-12°C (10°F) .83 Bar (12 Psi)
-9°C (15°F) 1.03 Bar (15 Psi)
-7°C (20°F) 1.24 Bar (18 Psi)
-4°C (25°F) 1.51 Bar (22 Psi)
-1°C (30°F) 1.79 Bar (26 Psi)
2°C (35°F) 2.07 Bar (30 Psi)
4°C (40°F) 2.41 Bar (35 Psi)
7°C (45°F)
2.76 Bar (40 Psi)
10°C (50°F) 3.10 Bar (45 Psi)
13°C (55°F) 3.52 Bar (51 Psi)
16°C (60°F) 3.93 Bar (57 Psi)
18°C (65°F)
4.41 Bar (64 Psi)
21°C (70°F) 4.90 Bar (71 Psi)
24°C (75°F) 5.38 Bar (78 Psi)
Normal High Side Pressures
5.18 BAR to 8.28 BAR
5.18 BAR to 8.28 BAR
5.18 BAR to 8.28 BAR
5.18 BAR to 8.28 BAR
possible problem is
MECHANICAL
(see General Troubleshooting Guide)
LEAK
RESTRICTION
INEFFICIENT COMPRESSOR
OVER CHARGE
Pressure