Replacement The Pcb; Replacement Of The Electrical Heater - Hitachi YUTAMPO Series Service Manual

5 Servicing
Indoor unit

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

5.2.4 Replacement of the electrical heater

1 Drain the DHW tank as explained in section
of the DHW".
2 Remove the screws (x4) -1- of the heater cover.
54 SMGB0135 rev.0 - 06/2020
3 Clamp the middle part of the spacers (x3) -1- with long-
nose pliers and remove the PCB toward front side.
?
N O T E
When install new one, proceed in reverse way than disassembling.
"Draining 3 Unscrew and disconnect the electric wires (N and L)
-1- from the heater -2-.
1
4 Unscrew and remove the electric heater from the tank.
?
N O T E
When install new one, proceed in reverse way than disassembling.
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5
4
1
1
3
2
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