Daikin LX10F10A, Service Manual

Page: 105 / 126

4-16
4.8.3 Inverter Board
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Precautions when replacing inverter board
1) Wait 10 minutes or more after turning off the circuit
breaker and then open the inverter box cover.
2) Before starting the work, open the inverter box
cover and check that the voltage between terminals
P2 and N on the inverter board is 50VDC or less.
●
Removing the inverter board (Fig. 1)
1. Remove the front cover (10 mounting bolts).
2. Remove all cables connected to the inverter
board (installed on the right side inside the box).
3. Remove the right cover (12 mounting bolts).
Front cover Right cover
(inverter board attached behind)
Fig.1 Inverter box
●
Mounting the inverter board
The inverter board and the right cover are combined.
(Fig. 2)
Inverter board
Right cover
Fig.2 Inverter board
1. Reinstall the inverter board and reconnect the
cables in reverse order (3 ⇒ 2 ⇒ 1).
2. Mounting the right and front covers.
Use the attached new seal washers. Tighten the
bolts temporally while checking that the packing is
not deformed and then tighten them fully one by one
evenly (to prevent water from entering). Tightening
torque (M5) : 431
± 65 cN ・ m
4.8.4 CPU Board
CPU board I/O board
Mounting bolt
Mounting bolt
Mounting bolt
Mounting bolt
●
Replacement procedure
1. Removing CPU board
1) Disconnect the cable that connects to CPU
board from the connector.
2) Remove the mounting bolts on the top and
bottom of CPU board and pull the board
forward.
3) Remove the provided rechargeable battery
(including the lead).
2. Mounting CPU board
Reverse the above procedure to mount the
rechargeable battery, connect the cable and
mount CPU board using two bolts.
3. Uploading the latest software
After mounting CPU board, upload the latest
software.
＊ Download the latest software from the Daikin's
web site or request it at Daikin Service Office
near you.
4. Necessity of configuration setting
Case 1. When using CPU board from Daikin
spare part, configuration setting is not required.
The configuration setting is not conducted for
spare part CPU board but the configuration
setting values are automatically transmitted from
operation board (EC3) when power is ON.
Case 2. When occasionally using CPU board of the
adjacent reefer, configuration setting is required.
In this case "Configuration Set screen" is
displayed when power is supplied as shown
※ 12
Configuration Set in paragraph 2.3. Configuration
Set values varies by model. Refer to "Configuration
Setting Table" issued separately.