Fujitsu 24LMAS1 Installationshandbuch - Seite 15
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8.2. External output
8.2.1. Wiring of connector
When installing connection cable, specified part (optional parts) must be used.
Output
Error status
Compressor status
* Make the distance from the PC board to the connected unit within 33ft (10m).
Load
• Load : DC 50mA or less is recommended
Circuit diagram example
Indoor unit
control PCB
Example:
Connector
Relay unit
1
P590
2
1
PA590
2
*33ft
(10m)
Signal
8.2.2. Error status output (P590)
An air conditioner error status signal is produced when a malfunction occurs.
Error status
Error
Normal
Output signal
On
Off
8.2.3. Compressor status output (PA590)
Compressor operation status signal is produced when the compressor is running.
Compressor status
Operation
Stop
Output signal
On
Off
Connector
P590
PA590
Connected unit (Locally purchased)
Example: Fan
Relay
power
supply
9. PUMP DOWN
• Never touch electrical components such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
• During the pump down operation, make sure that the compressor is turned off
before you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way
or 3-way valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
• Perform the pump down operation before disconnecting any refrigerant pipe or
electric cable.
• Collect refrigerant from the service port or the 3-way valve if pump down cannot be
performed.
• In case of a group control system installation, do not turn the power off until the pump
down is completed in all outdoor units.
(Group control system installation described in "SPECIAL INSTALLATION
METHODS" in the installation manual of the indoor unit.)
• Operate [PUMP DOWN] button (S130) on the display board with the following
procedure.
LED display part
Button part
WARNING
CAUTION
LED display
Push buttons
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