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(5) Cut the jumper wires of the service P.C. board as indicated in the table below.
These settings are different from the settings for the jumpers on the P.C. board (malfunctioning board) prior
to its replacement.
If the model setting is not selected, inspection code "L10" will be displayed, and the outdoor unit operation
will remain stopped.
Model name
Service P.C. board
MCY-MHP0404HT*-**
MCY-MHP0504HT*-**
MCY-MHP0604HT*-**
Interface P.C. board
(43H69011)
DIP switch setting location
SW06
SW07
SW09
SW10
SW11
SW12
SW13
SW14
SW16
SW17
Jumper wire setting location
J12
J11
J10
J09
Short connector
J08
(6) Set the DIP switches of the service P.C. board to the settings used before replacement.
(7) The short connectors must be connected at the address setup stage. Therefore, when replacing the P.C.
board, leave the shipment settings unchanged, and after having replaced the board, follow the instructions in
section 8-4. "Address setup" in the service manual.
(8) After setting the jumper wires of the service P.C. board, install the board in the outdoor control unit.
(Check that the card edge spacers are securely fixed in place.)
(9) Connect the connectors of lead wires which were disconnected when the P.C. board was replaced, as shown
on the wiring diagram display panel.
(Check that the connectors have been inserted correctly and securely to prevent connection errors.)
(10) If any of the components on the P.C. board have been bent in the course of the replacing the board, rework
them so that they do not come into contact with the other components.
(11) Install the cover, turn on the power, and check operation.
J08
Factory default
Yes
Disconnect
Leave intact
Disconnect
Jumper wires
J09
J10
Yes
Yes
Disconnect
Leave intact
Leave intact
Disconnect
Leave intact
Disconnect
167
J11
J12
Yes
Yes
Leave intact
Disconnect
Leave intact
Disconnect
Leave intact
Disconnect
7-segment display
D600
D601
D602
D603
(Card edge spacer)
Push this in the direction of the
arrow to unlock and remove the
P.C. board assembly.
D604
- Quick Links:
- Service Manual
- Outdoor Unit
- Outdoor Unit
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Table of Contents
Troubleshooting
