Ampcontrol MEC-1 - Fault Indication and Start-up

Ampcontrol CSM Pty Ltd - ABN 35 000 770 141
ECDB006 MEC-1 User Manual
Rev 1 – MARCH/2020
MEC-1 USER MANUAL R0 13/03/2020 13:16 Page 16 of 18
7.3.3 Short Circuit (Red)
LED state
Indication
Off
Shunt resistance above 1.25kΩ
Flashing
Non-latch mode: Shunt resistance is below 1.25kΩ but for less than trip time setting
Latch mode: the relay has tripped on series resistance and shunt resistance is now below
1.25kΩ
On
Shunt resistance below 1.25kΩ
7.3.4 Open Circuit (Red)
LED state
Indication
Off
Series resistance is below trip setting
Flashing
Non-latch mode: Series resistance is above trip setting but for less than trip time setting
Latch mode: the relay has tripped on shunt resistance and series resistance is now above
trip setting
On
Series resistance is above trip setting
7.3.5 Start Timed Out (Red)
LED state
Indication
Off
Start button not pressed
Flashing
Start button is pressed
On
Start button has timed out (held down for more than 15s)
7.4 Fault Indication
CAUTION!
When an internal fault occurs, all the LEDs will be flashing together and the measurements
can no longer be trusted. A power cycle is needed to reset this state. If this happens
repetitively, please contact Ampcontrol as the unit may be damaged.
The MEC-1 continuously checks the health of its internal circuitry. If these checks fail, the MEC-1 will show an internal fault by
flashing all LEDs and returning the relay contacts to the default position.
7.5 Starting the MEC-1
When first powered, the MEC-1 will begin checking its internal circuitry as well as the pilot circuit. If no faults are detected within
1.7s the MEC-1 will be ready to start.
• If remote start mode is not selected the MEC-1 will automatically start, energising its output relay.
• If remote start mode is selected the relay will wait for the start button to be pressed.
After a trip has occurred and the fault cleared, the MEC-1 can be reset and re-started depending on the configured modes:
Latching Mode
Remote Start
Mode
Starting the MEC-1
No
No
Automatic re-start 1s after the fault has been cleared.
No
Yes
Press the start button a minimum of 1s after the fault has been cleared.
Yes
No
Automatic re-start immediately after manual reset
Yes
Yes
Press the start button after manual reset