Johnson Controls LN-IO -1 Series User Manual

LN Series Free Programmable LN-PRGxxx-12 Controllers Installation Instructions14
Maintenance
Each controller requires minimal maintenance, but it is
important to:
• clean the outside of the front plate and the inside of
the back plate with a dry cloth.
• verify the tension of all wires and cables each time
you service the controller.
Disposal
The Waste Electrical and Electronic Equipment
(WEEE) Directive sets regulations for the recycling and
disposal of products. The WEEE 2002/96/EG Directive
applies to stand-alone products that can function on
their own and are not a part of another system or piece
of equipment. For this reason, Johnson Controls®
products are exempt from the WEEE Directive.
Nevertheless, they are marked with the WEEE symbol,
indicating the devices are not disposed with municipal
waste.
Dispose of products at the end of their useful life
according to local regulations and the WEEE Directive.
Troubleshooting
Table 5 describes some troubleshooting scenarios.
!
CAUTION: Risk of Electric Shock.
Disconnect the power supply before
making any electrical connections to
avoid electric shock.
MISE EN GARDE : Risque de décharge
électrique.
Débrancher l'alimentation avant de
réaliser tout raccordement électrique afin
d'éviter tout risque de décharge
électrique.
Table 5: Troubleshooting (Part 1 of 3)
Problem Solution
Controller is powered but does not turn on.
Fuse Is Blown Disconnect power from the controller and check the fuse integrity. Reconnect
power.
Power Supply Polarity Verify that consistent polarity is maintained between all controllers and the
transformer. Ensure that the COM terminal of each controller is connected to the
same terminal on the secondary side of the transformer. See Figure 4 and
Figure 3.
Controller cannot communicate on the L
ONWORKS network.
Absent or Incorrect Supply Voltage 1. Check power supply voltage between 24 VAC/DC ±15% and COM pins, and
ensure that it is between acceptable limits.
2. Check for tripped fuse or circuit breaker.
Overloaded Power Transformer Verify the transformer is powerful enough to supply all controllers.
Network Not Wired Properly Check that the wire connections are correct.
Absent or Incorrect Network Termination Check the network terminations.
Controller communicates well over a short network but does not communicate on large network.
Network Length Check that the total wire length does not exceed the specifications of the Junction
Box and Wiring Guideline for Twisted Pair L
ONWORKS Networks.
Wire Type Check that the wire type agrees with the specification of the L
ONWORKS LN-
Series Network Communications and Interface Guide
Technical Bulletin (LIT-
1201253) or Junction Box and Wiring Guideline for Twisted Pair L
ONWORKS
Networks.
Network Wiring Problem Check that the wire connections are correct.
Absent or Incorrect Network Termination Check the termination(s). Incorrect or broken termination(s) make the
communication integrity dependent upon a controller's position on the network.
Extra Capacitance Ensure no extra capacitance is connected to the network other than the standard
FTT circuit, and a maximum of a 3 meter stub (in bus topology).
Number of Devices on Network Segment
Exceeded
The number of controllers on a channel should never exceed 64. Use a router or
a repeater in accordance with L
ONWORKS LN-Series Network Communications
and Interface Guide
Technical Bulletin (LIT-1201253) or Junction Box and
Wiring Guideline for Twisted Pair L
ONWORKS Networks.

Johnson Controls LN-IO -1 Series Specifications

General

Brand	Johnson Controls
Model	LN-IO -1 Series
Category	Controller
Language	English