22 -Hardware Key Reading Error; 23 - Earth Connection Leakage (Pe Leakage); 25 - Anomaly In The Fpga Bus Of Microswitch Board (62); 30 - Checking Minimum Current Threshold - Cebora KINGSTAR 400TS Manual De Servicio

CEBORA S.p.A.
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Check the wiring between terminals 3 - 4 of J2 (J4 on Item No 374) on power board (48)
and terminals 1 - 2 of J22 on control board (37).
Check that terminals 3 - 4 of J2 (J4 on Item No 374) on power board (48) are short-
circuited.
With the power source off, temporarily disconnect J22 from the microswitch board (37).
Power the power source again and check the voltage on J22 of microswitch board (37),
terminals 2(+) - 1(-)= +5 Vdc. If not correct, replace microswitch board (37).
Replace microswitch board (37) and/or power board (48).

3.6.10- 22 -Hardware key reading error

Error in reading hardware key authentication code. Check the wiring between J15 of
panel board (70) and the hardware key.
Contact Cebora Technical Aftersales Service to replace the wiring and/or hardware key.

3.6.11- 23 - Earth connection leakage (PE leakage)

In the power source, a maximum current sensor is fitted on the bus connection cable to
detect any insulation leaks to earth.
The sensor is formed from a reed switch fitted in a solenoid connected in line with the
power source earth cable. Any current circulating in the earth cable will cause the reed
switch contact to close.
Check that the leakage current detection circuit is operating correctly by carrying out the
following tests.
Power source powered, control board (37), connector J13, terminals 1(+) and 2(-) =
0 Vdc approximately, reed contact closed = insulation OK, +10 Vdc, reed contact open
= insulation not OK, check connection between J13 control microswitch board (37) and
J2 precharge mains filter board (39).
Check that there is a U-bolt between pins 1 and 2 of connector J2 on precharge mains
filter board (39).
If the outcome is positive, identify the cause of the insulation leak in the power source,
looking for components that are damaged or with signs of burning.

3.6.12- 25 - Anomaly in the FPGA bus of microswitch board (62)

This code covers various problems that can occur in the inverter control on power board
(48).
Usually they concern defects that cause excessive current flow in the primary winding of
transformer (53), due, for example, to short circuit in the windings of transformer (53) or
in the diode assembly (27).
To analyse the problem, see "no-load operation" section 3.5.9. Replace microswitch
board (48) and/or power board (37).

3.6.13- 30 - Checking minimum current threshold

CHECKING MINIMUM CURRENT THRESHOLD
□ Microswitch board (37), connector J22, terminals 7(+) - 4(-) = +360 mVdc, +/- 10
mVdc, with power source powered and no current delivered.
3301045 17/09/2019