Gree CN851W1000, Service Manual

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154
DC Inverter Multi
VRF Service Manual
Reference Value of the Debugging Parameters for the Pdm-NaB Series Modular DC Inverter VRF System
No. Debugging Items Parameter Description Unit Reference Value Remarks
14
System
Parameters
Opening level of the electronic
expansion valve of the outdoor unit
PLS
●480PLSU;Under the cooling mode, the
opening level of the electronic expansion
valve should keep at 480PLSU consistently.
●Under the heating mode, the opening
level of the electronic expansion valve
should be among 100~480PLS
15
Running frequency of the
inverter compressor
Hz Between 30Hz~90Hz
16 Inverter compressor current A
According to the different running
frequency and load, the corresponding
current varies among 7A~20A.
17
IPM module fin temperature
The normal temperature is lower than
95 and 40 will be displayed when
the temperature is lower than 40 .
18 Driving bus voltage V
The normal bus voltage is 1.414 times of
that of power supply. E.g. the voltage of
the three-phase power supply is 390V, then
the bus voltage after rectification should be
390v×1.414=551v with the tolerance of 15v.
19
Indoor
Unit
Ambient temperature
of the indoor unit
——
20
Inlet pipe temperature of the heat
exchanger of the indoor unit
●According to the different ambient
temperature, the inlet pipe temperature is
1 ~7 lower than that of the outlet pipe
temperature under the cooling mode.
●Under the heating mode, the inlet pipe
temperature is 10 ~20 lower than that of the
outlet pipe temperature of the same indoor unit. 21
Outlet pipe temperature of the
heat exchanger of the indoor unit
22
Midway pipe temperature of the
heat exchanger of the indoor unit
●Under the cooling mode, the midway
pipe temperature is some 0 ~5 lower
than that of the outlet pipe temperature.
●Under the heating mode, the midway
pipe temperature is between those
of the inlet and outlet pipes.
23
Opening angle of the electronic
expansion valve of the indoor unit
PLS Automatic adjustment between 100~480PLS
24
Communication
Parameters
Communication Data —
Real-time check through the monitoring
software is realizable to the data from
the main board and wired controller,
without occurrence of any malfunction.
25
Drainage
System
—— —
The drainage of the indoor unit goes smoothly
and thoroughly; no condensate water is
accumulated in the drain pipe; and no water
drips directly along the base frame of the unit.
26 Others ——
The compressor and fan motor of the
outdoor/indoor unit run without any
abnormal sound and any malfunction.