Troubleshooting - Generac Power Systems PM-DCP Owner's Manual

TROUBLESHOOTING GUIDE
No LEDs are lit.
The "Communication OK"
LED is flashing at the rate:
one second on/one second off
The "Communication OK"
LED is flashing at the rate:
0.5 seconds on/two seconds off
1. Check for proper battery supply at J1 pins 3 and 4.
• J1 pin 3 should be + Battery (12 or 24 volts).
• J1 pin 4 should be – Battery.
• Refer to the "power supply requirements" section at the
beginning of the manual for cable specifications.
2. Check the 1 Amp panel fuse, replace if necessary.
1. Does the RS485 communications cable meet specifications.
Refer to the "Communication with generator control system"
section at the beginning of the manual.
2. Check that the RS485 connections are connected properly.
• RS485+ connected to J1 pin 1.
• RS485– connected to J1 pin 2.
• Shield is connected correctly. Refer to the wiring schematic for
your particular model located in this manual. Note the screen
should be connected on one end only.
3. Check for proper installation of the RS485 cable between the annunci-
ator and the generator's control system. Is this cable sharing a conduit
or running next to any high voltage or other "noisy" electrical lines?
4. Check that the DCP port is set to 4800, N, 8, 2.
5. Use GenLink communication diagnostics to check if data is being sent
or received via the Tx and Rx check boxes. Go to pull-down menu for
diagnostics and select "Com Ports". Select the port the R.A. is connect-
ed to (normally port 0) and look to see if the check boxes change
state. If not, data is not being transmitted/received, check the cabling.
If data is being received, check the baud rate, etc.
1. Does the RS485 communications cable meet specifications?
Refer to the "Communication with generator control system"
section at the beginning of the manual.
2. Is the cable shield connected correctly? Refer to the wiring schematic
for your particular model located in this manual. Note that the
screen should be connected on one end only.
3. Check for proper installation of the RS485 cable between the annunci-
ator and the generator's control panel. Is this cable sharing a conduit
or running next to any high voltage or other "noisy" electrical lines?
4. Check that the DCP port is set to 4800, N, 8, 2.
5. Use GenLink communication diagnostics to check if data is being sent
or received via the Tx and Rx check boxes. Go to pull-down menu for
diagnostics and select "Com Ports". Select the port the R.A. is connect-
ed to (normally port 0) and look to see if the check boxes change
state. If not, data is not being transmitted/received, check the cabling.
If data is being received, check the baud rate, etc.
20-light Remote Annunciator
Generac ® Power Systems, Inc. 7