Troubleshooting Traulsen Intela-Traul Mit Ii Relay Module - Traulsen G Series Manual

I. e - Troubleshooting Traulsen Intela-Traul MIT II Relay Module
Relay Module Function:
The Traulsen Relay Module is a long black rectangular box approximately 2 x 2 x 7 inches (5.08
X 5.08 X 17.08 centimeters) located behind the controller (front panel display) that contains
several switching relays. The relays inside the module are used to send line voltage to the
compressor (or heaters if a Hot Food box) fan motor(s), or defrost heaters or defrost solenoids,
as needed. The actuation of these relays is controlled by low voltage DC signals sent from the
Intela-Traul™ Control.
Relay Module Architecture:
Figure 3
Note: Items 1, 3, & 4 are equipped with snubber circuits to reduce arcing and increase relay life. As
result Line Voltage will always be measured at the relay output regardless of relay state, open/closed.
Relay Module Control Voltage:
Relay control voltage is checked at the 18pin connector which delivers a range of 1-5VDC to the
relay module when the control is calling for a relay to be energized. When checking for relay
control voltage the 18pin connector MUST remain connected.
Item # Color Function
1 Purple 115vac Output to Defrost Heater
2 Black 115vac Input Line Voltage Power
3 Gray 115vac Output to Evaporator Fan/Blower(s)
4 Orange 115vac Output to Door Frame Heater(s)
5 White 115vac Line Voltage Neutral
6 Yellow 115vac Input from Door Switch(s)
7 Pink 12VDC Output Compressor Relay Control Voltage
8 18pin connector 1-5VDC Control Voltage from Intela-Traul™ Controller
9 Transformer Line Voltage to 12V Transformer
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