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5-minute delay function
Cooling/heating operation
Heating mode characteristic
Unit operation condition
Protection device (such as high pressure switch)
• If starting up the unit after being powered off, the compressor will run about 5 minutes later
against being damaged.
• In operation if outdoor temp. arises, indoor fan motor will turn to low speed or stop.
• Indoor units in same refrigeration system can be controlled individually, but cannot run in
cooling and heating mode simultaneously. If both cooling mode and heating mode are set in
one refrigeration system, system will execute the first command and ignore latter conflicting
command. To change to other mode, it is a must to reset the running mode of all the indoor
units in the system.
• If the A/C manager sets the unit in cooling or heating mode fixedly, the unit cannot run in the
other modes.
• 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.
• 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 still be light. 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.
Commissioning and the performance
