Panasonic CS-MC90KH / CU-MC140KH / CS-MC90KH / CU-MC180KH / CS-MC90KH / CU-3MC200KH Service Manual ▷ View online
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CS-MC90KH
Servicing Information
●
Inspection points for the Indoor Electronic Control-
ler
ler
1. The Electronic Controller, a signal Receiver and an
Indicator can be seen by removing the Front Grille
and Control Board Cover, as shown in the Fig. 1.
and Control Board Cover, as shown in the Fig. 1.
●
Indoor Fan Motor removal procedure
1. Remove the connector CN-MTR (GREEN) of Fan
Motor and connector CN-STM (GREEN) of stepping
motor from the electronic controller. Release the
earth wire (YELLOW-GREEN) from the control board
and sensors from its holders. (Refer Fig. 1)
motor from the electronic controller. Release the
earth wire (YELLOW-GREEN) from the control board
and sensors from its holders. (Refer Fig. 1)
2. Remove the Control Board
The Control Board can be removed by releasing the
top, left and right tabs shown in Fig. 2, 3, 4.
top, left and right tabs shown in Fig. 2, 3, 4.
Sensors
Earth Wire Connector
Electronic
Connector
(CN-MTR)
Connector
(CN-MTR)
Electronic
Controller
Controller
Indicator
Stepping Motor Connector
(CN-STM)
(CN-STM)
Signal Receiver
[A
↔
B] selection switch [SW1]
(Used when there are two units in one room)
Top Taps
Releasing the 2 right
tabs by pressing down
the top tab and pushing
up the bottom tab.
tabs by pressing down
the top tab and pushing
up the bottom tab.
Remove the Control Board
Fig. 2
Fig. 4
Releasing the 2 left
tabs by pressing down
the top tab and pushing
up the bottom tabs
tabs by pressing down
the top tab and pushing
up the bottom tabs
Fig. 3
Fig. 1
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CS-MC90KH
Servicing Information
3. Remove the Fan Motor
Loosen the Fan Motor securing screw at the junction
with Cross Flow Fan. (Fig. 5)
with Cross Flow Fan. (Fig. 5)
Remove the particular piece and the Fan Motor can
be taken off as shown in Fig. 6 and 7.
be taken off as shown in Fig. 6 and 7.
4. To fix the Indoor Fan Motor, ensure that the Fan
Motor securing screw is positioned at the rear end
and the Fan Motor lead wire is positioned parallel
to the Fan Motor. (Fig. 8)
and the Fan Motor lead wire is positioned parallel
to the Fan Motor. (Fig. 8)
Fan Motor securing screw
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fan Motor securing screw is
positioned at the rear end
positioned at the rear end
Fan motor lead wire
is positioned parallel
to the Fan Motor
is positioned parallel
to the Fan Motor
Remove the Indoor Fan Motor
Particular piece
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CS-MC90KH
●
Cross Flow Fan Removal Procedure
1. Remove the Indoor Fan Motor.
(Refer to the removal procedure of the Indoor Fan
Motor.) (Fig. 9)
Motor.) (Fig. 9)
2. Remove the Air Discharge Grille by taking off the
screws that hold the Air Discharge Grille and then
pull the Air Discharge Grille in a down and forward
direction. (Fig. 10)
pull the Air Discharge Grille in a down and forward
direction. (Fig. 10)
3. Pull off the Bearing at the left of the Cross Flow Fan.
(Fig. 11)
4. Take off the mounting tab on the left side of the Heat
Exchanger, pull the Heat Exchanger forward (left
side) and remove the Cross Flow Fan.
(Fig. 12)
side) and remove the Cross Flow Fan.
(Fig. 12)
Fig. 9
Fan Motor
Servicing Information
Fig. 11
Fig. 12
Heat exchanger mounting tab
Bearing
Fig. 10
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CS-MC90KH
Servicing Information
●
By adding a jumper wire to the remote control side and a carbon resistor (1/4 W, 10 k
Ω
) to the indoor printed
circuit board, it is possible to select 4 types of transmission codes including one at time of delivery condition
(1).
(1).
Remote control
1
2
3
4
Switch SW B
↔
A
A
B
A
B
J – B
Jumper wire
Jumper wire
Indoor printed circuit board
Switch SW1
A
B
A
B
RX
10k
Ω
10k
Ω
Note
At product delivery
•
Auto/Manual control switch for solenoid control
valve
valve
1. AUTO operation
When the AUTO/MANUAL control switch is turned to
the “AUTO” position, the normal operation of solenoid
control valve will be performed. (The open and close of
the solenoid controlled valve is depend on the controller.)
the “AUTO” position, the normal operation of solenoid
control valve will be performed. (The open and close of
the solenoid controlled valve is depend on the controller.)
2. MANUAL operation
When the AUTO/MANUAL control switch is turned to
the “MANUAL” position, the solenoid controlled valve
for boths indoor unit A1 & A2 are opened compulsory.
(The signal from indoor unit is ignored). And the
compressor & outdoor fan motor are also stopped
compulsory.
the “MANUAL” position, the solenoid controlled valve
for boths indoor unit A1 & A2 are opened compulsory.
(The signal from indoor unit is ignored). And the
compressor & outdoor fan motor are also stopped
compulsory.
•
Remote Control Reset
When the batteries are inserted for the first time, or
the batteries are replaced, all the indications will
blink and the remote control might not work.
If this happens, remove the back cover of the remote
control and you will find a resetting terminal, and by
shorting it with a minus screwdriver, it will return to
normal.
the batteries are replaced, all the indications will
blink and the remote control might not work.
If this happens, remove the back cover of the remote
control and you will find a resetting terminal, and by
shorting it with a minus screwdriver, it will return to
normal.
•
Changing the wireless remote control
transmission code
transmission code
When two indoor units are installed in the same
room, in order to prevent operating errors caused by
using two remote controls, set up the remote control
[B
room, in order to prevent operating errors caused by
using two remote controls, set up the remote control
[B
↔
A] switch (SW1).
The unit is set to A when it is shipped.
SW1
A B
SW1
Remote Control
Remote Controller
B
A
B
A
Switch
Reset terminal
SW MANUAL
AUTO
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