91
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
• 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.
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.
• 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.
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.
In heating mode, indoor filter is sticked with duct; indoor air outlet is 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 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.
When power failure
• When power is failure in running, all the operations will stop.
•
After being electrified again, if with re-satrt up function, the unit can resume to the state before power off
automatically; if without re-satrt up function, the unit needs to be switched on again.
• 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 electrified, 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.
To protect compressor, electrify the outdoor unit for at least 12 hours before the unit runs.If the crankcase heater
is not electrified for 6 hours, the compressor will not work.
Confirm 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.
Electric wiring and the application
