Gree GMV5 Series, Руководство по обслуживанию

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GREE Photovoltaic Direct-driven Inverter Multi VRF Units
118
Example:
The outdoor environment temperature is 30°C(86
℉
) and the indoor environment temperature is
28°C(82
℉
). The pressure gauges connected with the system show that the high pressure value is
28°C(82
℉
) and the low pressure value is 27°C(81
℉
). The difference between the outdoor environment
temperature and either pressure value is less than 5°C K. It indicates that the system standby pressure
is normal.
Low
Pressure
Gauge
High
Pressure
Gauge
Oil
Detection
Valve
Low-
pressure
Detection
Valve
2.3.2.3 Electrical System Check
1) Check for high electromagnetic interference, dusts, and acidic or alkaline gas in the unit
environment.
a. The air conditioning unit can neither share the same power supply system with the equipment
containing variable-frequency drives, nor reside near the equipment generating high
electromagnetic interference. Otherwise, the air conditioning unit may fail to properly work due
to interference. If this case exists, records should be made. In the case of serious influence,
the air conditioning unit must be relocated or relevant measures must be taken.
b. Prevent acidic or alkaline gas/liquid from rusting cables of the air conditioning unit.
2) Check the installation appearance of power cables.
Check whether power cables of indoor and ODUs are installed according to vendor requirements
and whether cable connectors are reliably connected. Except the connection part of patch panels, wire
exposure is not allowed on any connection part of power cables.
3) Check the power capacity required for the unit.
The air conditioning unit works at a current much larger than the rated current (the working current
changes in a large scope in different conditions). The power grid provides unstable voltages and the line