Thermo King 098203, Maintenance Manual

Page: 121 / 264

Main Menu
119
10. Press and hold the
F4
key with the desired state in the menu line until you are returned to the
Setpoint/Control menu.
11. Press the
F1
key several times to return to the standard display.
Change the AFAM Delay
NOTE: The fresh air exchange time delay should be established by the shipper.
The AFAM delay setting keeps the fresh air vent closed for a preset time when the unit starts. This allows
faster product temperature pull-down. The AFAM delay can be set from 1 to 72 hours in 1-hour
increments. See “Change the AFAM Delay” on page 116 for the procedure to set the delay.
NOTE: During unit startup, the AFAM delay prevents the AFAM door from opening until the delay
times out. The AFAM delay prevents the AFAM door from opening due to the AFAM Rate or CO
2
system settings.
Change the CO
2
Minimum and Maximum Setting
NOTE: The minimum CO
2
rate should be established by the shipper.
The CO
2
rate sets the desired CO
2
level in the container when a gas sensor unit is installed. The actual
AFAM door position is based on the CO
2
level and AFAM delay.
1. Press the
M
ENU
F4
key to enter the main menu.Press the
F2
or
F3
key to scroll to Setpoint/Control
Menu and Press F4 to expand the menu.
1. Gas Sensor Assembly (Mounts in Evaporator)
2. Vent Door Assembly and Damper Motor
3. AFAM+ Expansion Module (Mounts on Back of Controller in Control Box)
Figure 99: AFAM+ System
WARNING: The vent door and motor actuator arm move immediately again when the a delay is
entered. Keep hands and tools away from the air exchange system components to prevent
personal injury or unit damage.
2
3
1