5 Servicing
Indoor unit
SMGB0135 rev.0 - 06/2020
54
5.2.3 Replacement the PCB
1
Pull backwards to remove the ebox cover.
2
Unplug the following cables:
Id.
Description
1
CN15 Relay-AR
2
CN4 Thermistor
3
CN20 LCD Controller
4
TB1 Transmission wiring
5
Earth
1
3
4
5
2
3
Clamp the middle part of the spacers (x3)
-1-
with long-
nose pliers and remove the PCB toward front side.
1
?
N O T E
When install new one, proceed in reverse way than disassembling.
5.2.4 Replacement of the electrical heater
1
Drain the DHW tank as explained in section
2
Remove the screws (x4)
-1-
of the heater cover.
1
3
Unscrew and disconnect the electric wires (N and L)
-1-
from the heater
-2-
.
1
2
4
Unscrew and remove the electric heater from the tank.
?
N O T E
When install new one, proceed in reverse way than disassembling.
