Gree GMV5 Series, Service Manual

Page: 304 / 321

GREE Photovoltaic Direct-driven Inverter Multi VRF Units
300
3.5.4 Wires and Cables of Photo -Vo ltaic Parts
1 Cables must not work under overload. Lead sheath of the cables should not get bulged or
cracked.
2 The parts of cables in and out of equipment should be sealed well. There should not be any hole
whose diameter is larger than 10mm. If there is a hole whose diameter is larger than 10mm. use
fire-resistive material to seal the holes.
3 For the parts that cables stress or pull too much to the casing of equipment, they should be well
supported.
4 Cable protective steel pipe mouth should be smooth with no holes or crackes. Its inside should be
smooth as well. The metal cable pipes should not be severely rusted. There should be no burrs, hard
objects or rubbish. If there are burrs, use the outer sheath of cable to wrap and tie it after file finishing.
5 Clean away the remains and rubbish in the outdoor cable pit in time. If the sheath of cable is
damaged, handle it in time.
6 When checking on the open channel of indoor cables, prevent the cables from being damaged.
Make sure the bearer is grounded and the channel can radiate well.
7 The stakes along the buried cables should be complete and in good condition. Digging is not
allowed near the buried cables. Make sure no heavy objects, building materials or temporary facilities
are placed or built on the ground above the cable. There should be no leakage of corrosive matters and
make sure the cables exposed outside are protected well.
8 Make sure the cover paltes of cable channel or cable pit are in good condition. There is no
collected water or scattered materials in the cable channel. Make sure the bearers in cable channel are
securely fastened and are not rusted or loose. Sheath and armoured material of armoured cables should
not be seriously rusted.
9 If multiple cables are laid parallel to one another, check the current distribution and temperature at
the outer coat of cables to avoid cables from buring any joint because of poor contact.
10 Make sure end terminals of cables are well grounded and the isulation sheath is complete, clean
and without flashover discharging mark. Make sure the cables have obvious color code.
11 The bridges of metal cables, the bearers, the incoming or outgoing cable conduits must be
connected to ground (PE) or zero (PEN). Ground wires should be connected between bridges.
12 The penetrating part of bridge should be sealed securely with fire-resistive material.
13 Make sure the bolts between bridges and bearers, and the bolts between bridge connecting
boards are well fastened.
14 Bridges should not have collected water.
3.5.5 Maintenance of the Part Combining Photovoltaic System and Base
1 The photovoltaic system should be securely connected with the base structure. If there is typhoon,
stormy rain or other adverse weather, check the directional angle and inclination of the photovoltaic cell
array afterwards to make sure they meet the design requirement.
2 The photovoltaic cell array must not be disordered, altered or adjusted.