Thermo King 098916, Руководство по обслуживанию

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Unit Description, Features & Options
32
Receiver Tank Sight Glass
The receiver tank contains a sight glass which has
three small balls that indicate the level of
refrigerant in the tank for checking the refrigerant
charge. A moisture indicator in the sight glass
changes color to indicate the level of moisture in
the system.
Evaporator Fans
MAGNUM models are equipped with either 2 or
3 evaporator fans. All models feature 2-speed
motors. The evaporator fans operate continuously
to circulate air inside the container. The
evaporator fans operate on:
• High speed for chilled cargo at setpoints of
-9.9 C (14.1 F) and above
• Low speed for frozen cargo at setpoints of
-10 C (14 F) and below
The evaporator fan low speed RPM is one-half the
high speed RPM.
The controller determines evaporator fan motor
speed based on the setpoint temperature and the
Economy mode setting.
NOTE: If Economy mode is on:
• Chill Loads: Evaporator fans operate on low
speed when container temperature is
in-range.
• Frozen Loads: Evaporator fans stop during
the Null mode; controller operates fans on
low speed for 5 minutes every 45 minutes.
Condenser Fan Control
The controller also uses a proportional-integral
derivative algorithm to control the condenser
temperature and ensure a constant liquid pressure
at the expansion valve. The condenser fan
operates continuously in high ambients. In low
ambient conditions, the controller cycles the
condenser fan on and off to maintain a minimum
condenser temperature. The controller maintains a
minimum 30 C (86 F) condenser temperature on
Chill loads and a minimum 20 C (68 F) condenser
temperature on Frozen loads.
1. Moisture Indicator:
Light Green = Dry
Yellow = Wet
2. Outer ring is color coded. Compare to
indicator.
Figure 10: Receiver Tank Sight Glass
AXA0371