Fault Matrix; Error Memory For Faults - Wilo -VR-System Installation And Operating Instructions Manual

8.2 Fault matrix

Cause
Low water protection system did not react
External Off
Intake pressure above pressure setpoint
Controller fuse faulty
Motor protection switch for the pumps has triggered
No mains voltage
Main switch "OFF"
Operating mode of the pumps "OFF"
Non-return valve leaking
Operating mode of the pumps "Manual"
Pressure setpoint set too high
Gate valve to pressure transducer closed
Gate valve in the system closed
Insufficient bleeding of the pumps
Error message pumps/frequency converter faulty
Intake pressure fluctuates severely
Diaphragm vessel closed or filled incorrectly
Volume flow too high
Suction-side pressure switch faulty or connected incorrectly
Check controller parameters
Check dry-running protection follow-up time T1
Check zero-flow follow-up time T2

8.3 Error memory for faults

The last 9 faults that occurred and the current
fault are displayed in the form of fault numbers
(code numbers) in the Error memory menu (see
Menu structure).
Code no. Cause
E00 Low water/dry running
E40 Sensor faulty
E42 Sensor cable faulty
E60 Overpressure
E70 Software stack low
E73 Internal electronic supply voltage too low
E75 Hardware analogue output faulty
E81...84 Pump malfunction, pumps 1...4
E90 Impermissible combinatorics
Installation and operating instructions Wilo VR System
Fault
•
•
•
•
•
•
•
•
•
• •
•
•
•
• •
• •
• •
•
• •
•
•
•
•
The error memory is designed in such a way that
the oldest fault (fault F9) is lost when a new fault
applies and is saved.
If F0 is displayed in the first menu item, a fault cur-
rently applies, which is characterised by its fault
number.
Remedy
Check intake pressure/water level of break tank
Replace sensor
Replace/repair sensor cable
Consult Wilo Service
Consult Wilo Service
Check mains connection, consult Wilo Service
Consult Wilo Service
Observe EBA of the pumps
Check DIP switches 1...3
•
•
•
• •
• •
•
•
•
•
• •
English
•
•
•
27