14
Figure 8: A5xx Controller relay states during defrost duration, drip-time delay, and evaporator fan delay
System setup parameters
The system setup parameters define the system attributes, the hardware features, and the hard-wired components
of the refrigeration system. To set up the A5xx Controller for the refrigeration system, enter the preferred system
setup parameters. After you define the system setup parameters for the refrigeration system, only the setup
screens and parameters that are necessary for the system’s operation are available for set up.
The system setup parameters include the following features:
• Date and time
• Defrost type
• Defrost termination type
• Evaporator fan type
• Sensor type
Table 7: A5xx Controller relay states during defrost duration, drip-time delay, and evaporator fan delay
callout table
Item Description
Relay off
Relay on
1 Defrost duration
2 Defrost termination
3 Drip-time delay
4 Drip-time ends
5 Evaporator fan delay cool down
6 Evaporator fan delay ends based on time
7 Normal cooling mode
Compressor
relay
Defrost
relay
Hi-spd fan
relay
(single-speed)
3
5
6
7