Deif PPM 300 - 13 Troubleshooting; Introduction; Finding the Source of the Problem; Using SWBD Control for Troubleshooting

13.Troubleshooting
13.1 Introduction
13.1.1 Finding the source of the problem
For some system problems, the controller activates an alarm. The operator may therefore think that there is a problem with
the controller, even though the actual problem is in the system.
It is not possible to describe every possible system problem. Troubleshooting requires an understanding of the system, a
logical and systematic approach, and careful observation of the system reactions to the troubleshooting actions.
This chapter describes using switchboard control for troubleshooting, as well as troubleshooting for some of the most
common alarms.
See the Designer's handbook for more information regarding alarms.
See Troubleshooting, in the Commissioning guidelines for troubleshooting regulators and terminal damage.
13.2 Using SWBD control for troubleshooting
13.2.1 Introduction to SWBD control
The exact procedure for operating the system under SWBD control depends on the switchboard design. Follow the
guidelines from the switchboard supplier when operating the system under switchboard control. Class societies require that
certain minimum protections are included in the switchboard. For example, there must be a synchronisation check before
closing a breaker.
DANGER!
Only trained operators should operate the system under switchboard control. Even though the controller
protections are active, the operator can create undesirable conditions during switchboard control. The
operator actions can also disrupt the power supply.
13.2.2 Troubleshooting the system under SWBD control
Problem
Any unexpected behaviour or situation in the system.
Solutions
Make sure that the problem is not from the power management system or the controller.
Tools
Switchboard inputs and switchboard instruments.
PPM 300 Operator's manual 4189340910 UK
www.deif.com Page 143 of 157