Gree GMV-24WL/C-T, Service Manual

Page: 68 / 150

GREE DC Inverter Side Discharge VRF
Ⅱ
for North America
65
No. Installation Problem Possible Consequence
9 The refrigerant pipe leaks.
Insufficient refrigerant circulating in the system decreases the cooling
performance of the air conditioner. Long-term operation under such
circumstance may cause an overheating compressor or even damage
the compressor.
10
Water drainage from the condensate
water pipe is not smooth. Residual water in IDUs can affect the normal operation of the system.
The possible water leakage can damage the IDU's decoration.
11
The ratio of slop for condensate water
pipe is insufficient or the condensate
water pipe is incorrectly connected.
Reverse slop or inconsistent connection of condensate water pipe can
hinder the smooth drainage and cause leakage of the IDU.
12 The air channel is improperly fixed.
The air channel will deform; vibration and noise occur during unit
operating.
13
The guide vane of air channel is not
reasonably manufactured. Uneven air quantity allocation reduces the overall performance of the
air conditioner.
14
The refrigerant pipe or condensate water
pipe does not meet the insulation
requirement. Water can easily condensate and drip to damage the indoor
decoration, or even trigger the protection mode of system due to
overheating operation.
15
The installation space for IDU is
insufficient. Since there is a lack of space for maintenance and checking, indoor
decoration might need to be damaged during such operation.
16
The IDU or the location of the air outlet or
return air inlet is not designed reasonably. The air outlet or return air inlet may be short-circuited, thus affecting
the air conditioning performance.
17 The ODU is improperly installed.
The ODU is difficult to be maintained; unit exhaust is not smooth,
which reduces the heat exchanging performance or even prevent the
system from normal operation; in addition, the cold and hot air for heat
exchange and the noise may annoy people in surrounding areas.
18 Power cables are incorrectly provided.
Unit components may be damaged and potential safety hazard may
occur.
19
Control communication cables are
incorrectly provided or improperly
connected.
The normal communication in the system fails or the control over IDUs
and ODUs turn in a mess.
20
Control communication cables are not
properly protected. The communication cables are short-circuited or disconnected, and
the unit cannot be started up due to communication failure.
Understand the special requirement (if any) for unit installation before implementation to ensure
installation quality. Relevant installers must have corresponding engineering construction qualifications.
Special type operators involved in the engineering implementation, such as welders, electricians,
and refrigeration mechanics must have relevant operating licenses and are accredited with vocational
qualification certification.
2 Installation Materials Selection
The materials, equipment and instruments used during air conditioning engineering construction
must have certifications and test reports. Products with fireproof requirements must be provided with
fireproof inspection certificates and must meet national and relevant compulsory standards. If
environmentally-friendly materials are to be used as required by customers, all such materials must meet
national environmental protection requirement and be provided with relevant certificates.
2.1 Refrigerant piping
(1) Material requirement: Dephosphorization drawing copper pipe for air conditioners;
(2) Appearance requirement: The inner and outer surface of pipe should be smooth without pinhole,
crack, peeling, blister, inclusion, copper powder, carbon deposition, rust, dirt or severe oxide
film, and without obvious scratch, pit, spot and other defects.