tekmar 441 Mixing Expansion Module - Manual (Page 3)

3 of 4 © 2007 D 441 - 08/07
Cleaning the Control
Power LED
• Green: Normal operation.
• Off: No power to the Mixing Expansion Module.
tN4 LED
• Solid Green: The Mixing Expansion Module established
tN4 communication to a tN4 System Control.
• Flashing Green: Attempting to establish communication
with tN4 System Control. This is normal for the first 3 minutes
after power is turned on.
• Off: There is no tN4 communication to a tN4 system
control.
LED Status Indicators
The control’s exterior can be cleaned using a damp cloth. Moisten the cloth with water and wring out prior to wiping the
control. Do not use solvents or cleaning solutions.
Error Messages
Power LED tN4 LED Error Condition
ON OFF
tN4 Bus open or short circuit.
•
• Check wiring for loose or broken wires.
•
• Check for a short circuit between tN4 and C.
•
• Check polarity on the R and C wires.
ON FLASHING
Flashing tN4 LED is normal on power up. If flashing tN4 LED continues for more than
3 minutes:
•
• Ensure there is a tN4 System Control on the tN4 bus.
•
• Ensure the Mixing Expansion Module is on a mix tN4 bus and NOT on a boiler tN4 bus.
•
• Ensure there are not multiple Mixing Expansion Modules on the same mix tN4 bus.
•
• tN4 System Control will display error message. See tN4 System Control and literature for
troubleshooting.
System Pump LED
• Green: The system pump relay is on.
• Off: The system pump relay is off.