Chapter 8 Fault diagnosis and countermeasures
8.1 Fault mode explanation
The lift integrated controller has almost 60 pieces of alarm information or protection functions.
It monitors all kinds of input signal, running condition, exterior feedback information. If some
abnormal error happens, relevant fault protection functions will act and the system controller
will display the fault code.
The lift
integrated controller is a complicated electric control system. Error information produced
by NICE 3000 can be divided into 5 sorts according to their inuence to the system. Different
fault has different disposal mode. And the respective relationship is listed in the next table:
Fault sort Relevant disposal Remark
Level 1 fault
Display fault code;
Error relay output action;
Any kind of working condition
will not be inuenced.
Level 2 fault
Display fault code;
Error relay output action;
Sever lift group control (parallel) system;
Can carry through natural
running.
Level 3 fault
Display fault code;
Error relay output action;
Stop at the nearest landing when in distance
control, then stop
running;
Stop running at once in other work condition.
After stop, the system will
close off output at once, and
close brake.
Level 4 fault
Display fault code;
Error relay output action;
When in distance control, the system will close
off output at once and close brake; after stop,
low speed running (such as return leveling,
inspection) is allowed.
The elevator can run in low
speed in condition of fault
code.
Level 5 fault
Express fault code;
Error relay output action;
The system blank off output at once, and close
brake;
Forbid running.
Forbid running.
8.2 Fault information and countermeasures
If fault alarm information appears, the system will dispose by their fault code. At this time, user
can construe fault on basis of suggestive information in this chapter, to ensure fault cause, and
find out soluti
on
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