Mitsubishi Electric City Multi PKFY-P Manuel D'installation page 7

5. Electrical work
1 B A
M1 M2 M1 M2 S
TB3 TB5
2 B
M1 M2
TB3 TB5
3
Fig. 5-4
A
ON
OFF
1 2 3 4 5 6 7 8 9 10
SW12
0
Fig. 5-5
t°
TH21
Room
temperature
thermistor
Maximum cable length
is 3m (9.8ft)
t°
Junction
TH21
connector
Room
temperature
thermistor
Preparations in
the field
Fig. 5-6
A
1 2 M1 M2 S 1 2
TB15 TB5 TB15
C C
A A
M1 M2 S M1 M2 S
TB5
C C
SWA
3
2
CN43
1
SW1
CN82
SW11 SWC SW14
0 0
2
1
Electrical parts box
CN20
Indoor control board
Error signal input cable (A)
Electrical parts box
CN20
Indoor control board
Accessory
8 Cable (Junction cable)
5.4. Connecting remote controller, indoor and
outdoor transmission cables (Fig. 5-4)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire) The "S"
on indoor unit TB5 is a shielding wire connection. For specifications about the
connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote
controller.
• Connect the remote controller's transmission cable within 10 m, 33 ft using a
0.75 mm 2 (AWG22) core cable. If the distance is more than 10 m, 33 ft, use a
1.25 mm 2 (AWG16) junction cable.
1 MA Remote controller
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2 M-NET Remote controller
• Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Nonpolarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
3 Wireless remote controller(When installing wireless signal receiver)
• Connect the wire of wireless signal receiver (9-pole cable) to CN90 of indoor
con-troller board.
• When more than two units are run under group control using wireless remote
controller, connect TB15 each with the same number.
• To change Pair No. setting, refer to installation manual attached to wireless
remote controller. (In the default setting of indoor unit and wireless remote
controller, Pair No. is 0.)
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable(M1(A), M2(B),
C Remote controller
D Wireless signal receiver
E Wireless remote controller
5.5. Setting addresses (Fig. 5-5)
(Be sure to operate with the main power turned OFF.)
• There are two types of rotary switch setting available: setting addresses 1 to 9
and over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is "3", remain SW12 (for over 10) at "0", and match SW11
(for 1 to 9) with "3".
2 How to set branch numbers SW14 (Series R2 only)
Match the indoor unit's refrigerant pipe with the BC controller's end connection
number.
Remain other than series R2 at "0".
• The rotary switches are all set to "0" when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set
them referring to the Data Book.
5.6. Sensing room temperature with the built-in
sensor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote
controller, set SW1-1 on the control board to "ON". The setting of SW1-7 and
SW1-8 as necessary also makes it possible to adjust the air flow at a time when
the heating thermometer is OFF.
5.7. Error signal input
For the PKFY-BM model, it is possible to change the operation of the indoor unit to
an error state by inputting an error signal.
1 Error signal input method (Fig. 5-6)
• Remove the room temperature thermistor TH21 from the indoor control board,
and connect the cable 8 (junction cable) supplied with the product.
• Replace the room temperature thermistor TH21 on the junction cable side.
• Connect an error signal (non-voltage a contact input) to the error signal input
cable (A).
• Store the junction cable inside the electrical parts box.
2 Significance of error signal
Configure the error signal so that it is set as follows.
• Non-voltage a contact input
• When normal: Error signal OFF (contact OFF)
• When error: Error signal ON (contact ON)
(S))
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