9. Troubleshooting
9.1 Regulators
9.1.1 Troubleshooting relay-controlled governors
Problem
The relay-controlled governor does not respond when the controller tries to raise or lower the
frequency.
Solutions Ensure that the wiring from the controller to the governor is correct.
Ensure that the governor receives the relay outputs.
Tools Screwdriver
Piece of insulated wire with stripped ends
DANGER!
Do not short circuit the GOV increase terminals for too long. Short circuiting these terminals for too long
can make the engine speed increase too much, causing overspeed and over-frequency.
Method 1. Look at the Input/output configuration in PICUS to check that the GOV increase and the GOV
decrease functions are assigned to the correct terminals.
2. Activate switchboard control.
3. Start the genset.
4. Use the wire to create a connection between the GOV increase relay terminals (normally open and
common). This short circuit replicates output from the controller, and the genset frequency should
increase.
• If the frequency increases:
◦ The controller terminals might not be assigned the GOV increase function. Check the Input/
output configuration in PICUS.
◦ The controller relay terminals may be damaged. If another set of relay terminals are available,
you can move the GOV increase wiring there, and assign the function to the terminals in
PICUS, then check whether the governor responds to the controller.
• If the frequency does not change:
◦ There is no connection from the controller to the governor. Check the governor wiring.
• If the frequency decreases:
◦ The GOV increase and GOV decrease relays may be swapped around in either the controller
or the wiring. Either swap the controller relay configuration, or swap the wiring.
5. Use the method in the previous step to check the GOV decrease relay terminals.
INFO
This method can be adapted to troubleshoot any controller relay output.
PPU 300 Commissioning guidelines 4189341106 UK
www.deif.com Page 67 of 75
To Next Page
Loading...
