Airwell YEVFD Series, Service Manual

Page: 46 / 92

Indoor power source and communication wiring
Item
Indoor
total
current (A)
Power
cable
section
(mm
2
)
Wire
length
(m)
Rated
current of
overcurrent
breaker
(A)
Rated current of residual
circuit breaker(A)
Ground fault interruptor(mA)
response time(S)
Communication wire
section
Outdoor/
indoor
(mm
2
)
Indoor/
indoor
(mm
2
)
<10 2 20 20 20A, 30mA, below 0.1s
2-core × (0.75-2.0mm
2
)
shielded wire
≥10 and <15 3.5 25 30 30A, 30mA, below 0.1s
≥15 and <22 5.5 30 40 40A, 30mA, below 0.1s
≥22 and <27 10 40 50 50A, 30mA, below 0.1s
■ Power cable and communication wire must be fixed firmly.
■ Each indoor must be grounded well.
■ When power cable exceeds the range, increase the gauge appropriately.
■ Shielded layer of communication wires must be connected together and be earthed at single
point.
■ Communication wire total length cannot exceed 1000m.
Communication wire for wired controller
■ The shielding lay of the signal line must be grounded at one end.
■ The total length of the signal line shall not be more than 250m.
Length of Signal Line (m) Wiring Dimensions
≤250 0.75mm
2
× 3 core shielding line
Trial operation and the performance
5-minute delay function
Cooling/heating operation
Heating mode characteristic
The unit operation condition
Defrosting in heating mode
■ If starting up the unit after being powered off, the compressor will run about 5 minutes later against being
damaged.
■ Indoor units can be controlled individually, but cannot run in cool and heat mode at the same time. If the cool
mode and the heat mode are existing simultaneously, the unit set latter will be standby, and the unit set earlier will
run normally.
■ If the A/C manager sets the unit at cooling or heating mode fixedly, the unit can not run at the other modes.
■ In operation if outdoor temp. arises, indoor fan motor will turn to low speed or stop.
■ To use the unit properly, please operate the unit under the allowed condition range. If operating beyond
the range, the protection device will act.
■ The relative humidity should be lower than 80%. If the unit runs at the humidity over 80% for a long period, the
dew on the unit will drop down and the vapour will be blowed from air outlet.
■ In heating mode, outdoor defrosting will affect the heating efficiency. The unit will defrost for about 2~10 minutes
automatically, at this time, the condensate will flow from outdoor, also in defrosting, the vapour will appear at
outdoor, which is normal. Indoor motor will run at low speed or stop, and outdoor motor will stop.
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