Comar Condensatori QR Manual De Instrucciones página 9

5. OPEATION ANOMALIES AND REMEDIES
All devices are throughly tested at works. Most malfunctions are caused by incorrect connections. The most common faults are
as follow.
TROUBLES
Main led (green) OFF
Yellow capacitive led (–º–) is
ON without capacitors banks
working
Banks led 's (1-2-3) ON but
capacitors banks not working
All capacitors banks on with a
low inductive load on the
network
Leds _∩∩∩_ and –³³– OFF
Yellow led capacitive (–³³–)
always lit also changing the
A-A (K-L) cables
Continous switching on/off of
one bank (hunting phenomena)
Red alarm led is ON
Other operation anomalies: please check again the correctness of the installation operations and check again all points of
"operation anomalies and remedies". A simple connection mistake can cause the P.F.Controller to function incorrectly. If the
P.F.Controller continues to work incorrectly, contact the Technical Office of the COMAR CONDENSATORI S.p.A, referring
to the serial number of the equipment (visible on the plate) and the value of measured current on the secondary circuit of
the C.T.
Fig.1 Electrical connection of QR6 regulator
Power supply failure
•
Check if supply voltage is present (fastons V-V).
Check if supply voltage is equal to the rated voltage of the regulator (fastons V-V).
Reverse the connections on the terminal A-A (K-L)
• • • •
Check if supply voltage is equal to the rated voltage of the regulator (fastons V-V).
•
Check if phase "L1" has been connected on "C" terminal.
• • • •
Check the neutral connection on contactors.
•
Check the three-pole contactor.
• • • •
Power of P.F. equipment not sufficient
• • • •
Check the capacitors feel and/or increase the power.
C.T. is connected upstream to the load but not of capacitors
• • • •
Connect the C.T. as shown in the connection diagram.
C.T. installed in the wrong phase: connect to phase L1.
• • • •
Possible capacitive load condition and terminal connection reverse.
•
Possible stand-by condition: at least one capacitor bank on, check the P.F. value.
• • • •
Low C.T. signal current: check the C.T. choise and the electrical connection by
• • • •
considering that the minimum current signal must be 500mA.
Possible manual working condition: chose the automatic (AUT) operation.
• • • •
Zero current signal: check that the C.T. isn't short-circuited.
•
Check the current signal on the secondary circuit of C.T. with tester.
C.T. connected on the supply cable of the P.F.C. equipment
• • • •
Connect according to electrical scheme Fig.1.
C.T. installed in the wrong phase: connect to phase L1.
• • • •
Trimmer % not well regulated: adjust it next "0".
•
The C/K value is not correct: check in table "C/K" for the right value.
•
The power of first bank is too high.
•
Alarm of maximum temperature: you see paragraph 4. ALARMS.
•
REASONS AND SOLUTIONS
Fig.2 Front of the electronic regulator type QR6
9
MU 03.04.MMM REV.2