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Before trial operation:
Before being energized, measure the resistor between power terminal block (live wire and
neutral wire) and the grounded point with a multimeter, and check if it is over 1M . If not, the
unit cannot be operated.
To protect compressor, energize the outdoor unit for at least 12 hours before the unit runs.If
the crankcase heater is not energized for 6 hours, the compressor will not work.
When power failure
Heating capacity
System marks
Commissioning
When power is failure in running, all the operations will stop.
After being electrified again, if with re-start up function, the unit can resume to the state before
power off automatically; if without re-start 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.
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.
Confirm the compressor bottom getting hot.
Except for the condition that there is only one master unit connected (no slave unit), under the
other conditions, fully open the outdoor operating valves (gas side, liquid side, oil equalization
pipe). If operating the unit without opening the valves, compressor failure will occur.
Confirm all indoor units being electrified. If not, water leakage will occur.
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 cannot start up at the room temperature, make trial operation for outdoor.
On the condition that multi VRF systems are installed, in order to confirm the relationship
between outdoor and indoor, please make marks on outdoor electric control box cover to indicate
the connected indoor unit. As the below figure:
Commissioning and the performance
Indoor model:
Room No.
e.g. Indoor A, system 1, Floor 2 2F-1A
