En-16
8.2. External output
8.2.1. Wiring of connector
When installing connection cable, speci
fi
ed part (optional parts) must be used.
Output
Connector
Error status
P590
Compressor status
PA590
* Make the distance from the PC board to the connected unit within 10m (33ft).
Load
• Load : DC 50mA or less is recommended
Indoor unit
control PCB
Example:
Relay unit
Connected unit (Locally purchased)
Example: Fan
Signal
*10m
(33ft)
Connector
Relay
power
supply
P590
PA590
1
2
1
2
Circuit diagram example
8.2.2. Error status output (P590)
An air conditioner error status signal is produced when a malfunction occurs.
Error status
Output signal
Error
On
Normal
Off
8.2.3. Compressor status output (PA590)
Compressor operation status signal is produced when the compressor is running.
Compressor status
Output signal
Operation
On
Stop
Off
9. PUMP DOWN
WARNING
• 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.
CAUTION
• 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.
Push buttons
LED display
S134
S133
S132
S131
S130
LED display part
Button part
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5/24/2019 9:59:21 AM
5/24/2019 9:59:21 AM