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5-minute delay function
• If starting up the unit after being powered off, the compressor will run about 5 minutes later against being damaged.
Cooling/heating operation
• 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 xedly, the unit can not run at the other modes.
The unit operation condition
• To use the unit properly, please operate the unit under the allowed condition range. If operating beyond the range, the
protection device will act.
Protection device (such as high pressure switch)
• High pressure switch is the device which can stop the unit automatically when the unit runs abnormally.
When the high pressure switch acts, the cooling/heating mode will stop but the running LED on wired controller will be
light still. The wired controller will display failure code.
When the following cases occur, the protection device will act:
In cooling mode, air outlet and air inlet of outdoor are clogged.
When protection device acts, please cut off the power source and re-start up after eliminating the trouble.
Defrosting in heating mode
• In heating mode, outdoor defrosting will affect the heating efciency. The unit will defrost for about 2~10 minutes
automatically, at this time, the condensate will ow from outdoor, also in defrosting, the vapour will appear at outdoor,
which is normal.
When power failure
• When power is failure in running, all the operations will stop.
• When abnormal occurs in running because of the thunder, the lightning, the interference of car or radio, etc, please cut
off the power source, after eliminating the failure, press "ON/OFF" button to start up the unit.
Heating capacity
• The heating mode adopts the heat pump type that absorbs outdoor heat energy and releases into indoor. So if outdoor
temperature goes down, the heating capacity will decrease.
Trial operation
• Before trial operation:
Before being electried, measure the resistor between power terminal block (live wire and neutral wire) and the earthed
point with a multimeter, and check if it is over 1MΩ. If not, the unit can not operate.
Conrm the compressor bottom getting hot.
Measure the system pressure with pressure gauge, at the same time, operate the unit.
• Trial operation
In trial operation, refer to the information of performance section. When the unit can not start up at the room
temperature, make trial operation for outdoor.
Trial operation and the performance
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