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5.1
Abnormal Handling Method
See the handling method of abnormal shown in the following table for details. Please note to turn off the main power
supply before the maintenance work.
Table 5.1 Abnormal Handling Method
NO
Problem
Content to check
Solution
1
Power on but not
working.
Check whether the product is connected to the power
supply cable?
Please connect with the power adapter of this product.
Is the main power supply switched on?
Please switch on the main power supply.
Is the power supply voltage in the normal range?
Please measure the voltage of main power supply. If exceeding the
range of AC100V
~
240V±10%, please check and investigate the wiring
system.
Is the POWER light on?
If unrelated to above content, the POWER doesn’t light up, it may be
considered as internal fault of the machine.
Please contact the closest repair center.
Does 7 segment digital tube flash the alarm
information?
Please eliminate alarm type and alarm signal.
2
After power on, it
cannot confirm
connection with the
air conditioner
Is the product connected with H-NET line?
Please connect the machine with the H- NET line.
Whether H- NET line is broken?
Please check the connection situation of the wiring.
Is the terminal resistance setting on the H- NET wiring
normal?
Only 1 terminal resistance can be connected on the H- NET wiring.
Is the address setting of the air conditioner normal?
Please refer to the air conditioner installation instruction manual to set
the indoor and outdoor unit address again.
Are all the connected air conditioners powered on?
Please power on all the connected air conditioners.
Does H- NET wiring use the designated specification
cable?
Please use cable with cross-sectional area greater than 0.75mm
2
and
total length within 1000m.
Does H- NET light continue to light up or off?
Please check whether H- NET wiring is connected properly.
If unrelated to above content, it may be considered as internal fault of
the machine. Please contact the closest repair center.
Does RUN light up for more than 20 min?
If RUN light hasn’t changed to flashing in 1Hz after 20min, it shows
that the connection confirmation is failed, please re-adjust the wiring,
after set the address of the air conditioner, carry out connection
confirmation again.
3
Cannot connect to
the computer for
management.
Whether the machine is connected with LAN wiring?
Please connect the LAN wiring of the product.
Please confirm if the terminals are matching.
Whether the computer for management is connected
with LAN wiring?
Please connect the LAN wiring of the computer for management.
Please confirm if the terminals are matching.
Whether the IP address designated by the management
software of the computer is same as the machine’s IP
address?
The initial IP address of the machine is 192.168.1.90.
If forget the changed IP address, please use the IP address during check
in 3.1.1 or reset to initial value.
Whether the IP address of computer for management
belongs to the same segment as the product’s IP
address? Does the ping request find the product from
computer for management?
Please ensure the computer for management is in the same segment as
the product, and ensure that ping request can find this product.
Is HUB powered on? (when HUB is used)
Please power on HUB.
5 Maintenance · After-sales Services