Immergas MINI NIKE 3 E - Page 46

44
STMiN3E ed 09/11 MINI NIKE 3 E
Technical DocumentationTechnical Documentation
A
230 VDC are present on the L-N terminals of the P.C.B.
No
Check the electric power supply upstream from the boiler and restore it.
Yes
e P.C.B. fuse is integral.
No
See section E
Yes
Replace the P.C.B.
B
ere are 230 VDC on clamps 1-2 of the X7 connector on the P.C.B.
No
Replace the P.C.B.
Yes
230 V DC are present on the pump clamps.
No
Restore the electric connection/replace the wiring.
Yes
e motor shaft turns freely.
No
Release the pump by acting on the shaft after having loosened the front
cap.
Yes
e start-up condenser is integral.
No
Replace the condenser.
Yes
Replace the pump.
C
CENTRAL HEATING MODE:
ere are 230 VDC on clamps 1-3 of the X3 connector on the P.C.B.
DOMESTIC HOT WATER MODE:
ere are 230 VDC on clamps 1-2 of the X3 connector on the P.C.B.
No
Replace the P.C.B.
Yes
e wiring between the 3-way motor and the board is OK.
No
Restore the electric connection/replace the wiring.
Yes
e 3-way cartridge functions regularly (it is not blocked).
No
Release/replace the 3-way cartridge.
Yes
Replace 3-way valve motor.
D
At least 20 V DC are present on the gas valve modulation coil cables.
N.B.: make the measurement by disconnecting the cables from the
coil (see gas circuit chapter).
No
Check wiring and replace the PC.B. if necessary.
Yes
e gas valve modulation coil has a resistance of 20-25 Ohm (SIT
845).
N.B.: make the measurement by disconnecting the cables from the
coil (see gas circuit chapter).
No
Replace the gas valve.
Yes
e gas valve is calibrated correctly.
No
Adjust Minimum and Maximum values of the gas valve in agreement
with that state din the instruction book.
Yes
e NTC ow probe is OK (10 kΩ at 25°C).
In DHW functioning mode, also check the DHW NTC probe.
No
Replace NTC probe.
Yes
Replace the P.C.B.
E
e operations stated below are indispensable for checking the quality of the relay electric contacts positioned on the board.
Replace the fuses checking that there are no short circuited components (pump, gas valve, etc.).
Check safety device times and the complete power removal from the gas valve, operating as follows:
- close the gas supply and make a function request;
- check that, after 2 ignition attempts, the display shows error "01";
- with the help of the single wire wiring diagram, use a tester to check that there is no voltage on either power supply cables of the gas valve main coils
(see gas circuit chapter).
Sections