Laird Controls North America Inc. 818A ユーザーズマニュアル

Command Pro Engineered Systems
User Manual

142134

Multiple Receivers Controlled by Multiple Transmitters Option:

One transmitter can control a maximum

of six receivers with a rotary selector switch. A rotary switch is often used to select a particular hoist/trolley

A/both/B. It can also be used for crane select, i.e. East/West.

5.6 Status Indicators

5.6.1 Status LED

The status LED indicates the transmitter operation. When the transmitter is operating normally, the LED

indicator emits short flashes at a low rate when no commands activate, and at a higher rate when a

command activates. Some transmitters use a red LED only. Others use a multicolored LED that flashes GREEN

when no problems are present and changes to RED when problems are encountered. See Status Chart

below.

Table 1: Transmitter Status Chart

LED Indication

Possible Cause

LED is off.

Transmitter is off – switch transmitter ON.
Batteries are dead – replace batteries.
Transmitter failure – call for service.

LED flashes at low rate.

Transmitter is operating in a normal mode.

LED flashes at high rate.

Command Switch is pressed.

LED flashes Red/Green (‘A’

series only).

Batteries getting low. Change batteries at the next

convenient opportunity.

LED flashes on-off at a slow

rate (½ second on and ½

second off).

Batteries getting low. Change batteries at the next

convenient opportunity.

LED remains on

continuously (LED might

flicker slightly).

A switch was activated at the time the transmitter was

switched on, or a general failure occurred that requires

factory service. Ensure no other switches are pressed

while attempting to switch the transmitter on.

LED will not light when

ON/OFF button is pushed.

Replace batteries. If this does not correct the problem, the

transmitter must be repaired.

5.6.2 Function Select LEDs

Two LEDs are used on some transmitters to indicate which control functions are active (such as hoist trolley A

or hoist trolley B. These are commonly used with pilot relays). When both are illuminated, both controls are

active. When both LEDs go out, neither control is active.