Removing Indoor Pcb; Removing Drain Pan; Removing Heat Exchanger - Hitachi FSG Series Service Manual

2
SERVICING
32
$
WARNING: TURN OFF all power source switches
2.5.6

REMOVING INDOOR PCB

1. Remove the front panel according to the item 2.5.2,
"Removing Front Panel".
2. Remove one screw (1) for the electrical box cover.
3. Remove the connectors (CN17, CN22, CN11) from the low
voltage PCB.
4. Detach two (2) hooks of the PCB base 1 fixing the low
voltage PCB, lift the low voltage PCB and remove other
connectors still connected.
5. Remove the earth wire from the heat exchanger, detach
one (1) hook of the PCB base 2 fixing the high voltage
PCB, lift the high voltage PCB and remove other
connectors still connected.
6. After the completion of replacement of PCB, connect the
connectors to the PCB in the reverse procedures of
removing. And firstly set the high voltage PCB to the
electrical box and then set the low voltage PCB to the
electrical box.
2.5.7

REMOVING DRAIN PAN

1. Remove the front panel according to the item 2.5.2,
"Removing Front Panel".
2. Remove the electrical box according to the item 2.5.5,
"Removing Electrical Box Cover".
3. Remove the drain pan from the unit by detaching the hooks
(A) and (B) from the left side of the drain pan, and
detaching the hook (C) by pulling the right side of the air
panel toward the front side.
4. For attaching the drain pan, perform the reverse
procedures for removing drain pan.
NOTE:
Check to ensure that the hooks (A), (B) and (C) are hooked
correctly .
2.5.8

REMOVING HEAT EXCHANGER

1. Remove the front panel according to the item 2.5.2,
"Removing Front Panel".
2. Remove the electrical box according to the item 2.5.5,
"Removing Electrical Box Cover".
3. Remove the drain pan according to the item, 2.5.7,
"Removing Drain Pan".
4. Remove the piping stay at the rear side of the indoor unit.
Earth Wire
Hook
PCB
Base 2
High Voltage
CN11
PCB
PCB Base 1,2
Heat
Exchanger
Detach
Hook
(B)
Drain Pan
Detach
Hook (A)
Draw the Drain
Pan toward the
Front Side
Heat Exchanger
Piping Stay
Electrical Box
Cover
Hook
Low Voltage
PCB
CN17
Hook
PCB Base 1
Terminal
board
Screw
Electrical
Box
Bend this
Hook and pull
up as shown
Heat Exchanger
Detach Hook (c)
Rear Side of Indoor Unit
Screw
Rear Piping of Heat
Exchanger
Screw