Comar Condensatori QSR6 Bedienungshandbuch Seite 43

6 Working tuonbles and solution.
TROUBLE
All banks on with a low
inductive load on the network
Continous switching on and
off of first bank (hunting
phenomena)
Displayed PF values not
correct
IND and CAP leds off
IND led ON and no insertion
of capacitor banks
CAP led is ON without
capacitor banks working
Blinking display
Display off, regulator not working
Display on, banks inserted
signalling, but capacitors
not working
Displayed " ALARM CAP" on
display
Displayed "-.--" on display
IF
PROBLEMS PERSIST AFTER ALL ABOVE MENTIONED SOLUTIONS SWITCH OFF THE REGULATOR FOR AT LEAST 20
SECS AND THEN SWITCH ON AGAIN. IF THE PROBLEM IS STILL PRESENT PLEASE CALL OUR TECHNICAL DEPARTMENT.
Soluzione
The CT is connected upstream the load but not of capacitors.
Connect the CT as shown in the connection diagram ( § 3.4).
a) The C/K value is not correct.
Check in the table "C/K VALUES" for the right value ( § 5.1).
b) The power of the first bank is too high for the selected PF requirements.
Reduce the first bank power according to paragraphs 2.4 and 2.5.
Increase the selected PF value ( § 5.2).
CT installed in the wrong phase: connect to phase L1 ( § 3.4).
a) Possible stand-by condition: at least one capacitor bank on.
Check the PF value of the network on the display.
b) Possible MANUAL working condition: choose the AUTOMATIC operation.
Minimun current alarm. Current lower than 500mA (see § 4.6).
CT installed in the wrong phase: connect to phase L1 (see § 3.4).
a) Alarm condition of least one value: see chapter (§ 4.6).
b) Check supply voltage is correct.
a) Check if supply voltage is present.
b) Check if supply voltage is equal to the rated voltage of the regulator.
a) Check if supply voltage is equal to the rated voltage of the regulator.
b) Check the "0Vac" connection on contactors.
c) Check if "220Vac" has been connected on "C" terminal.
d) Check contactor functioning.
a) Possible capacitive load condition.
b) CT installed in the wrong phase: connect to phase L1 (§ 4.6).
c) P.F. lower than 0,20 IND or CAP.
a) Zero current signal: check the C.T. and its connection and ensure the
minimum secondary current level is least 10mAmps (§ 3.4).
b) C.T. connected on the supply cable of the PFC equipment.
Connect according the connection diagram ( § 3.4).
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