GMV5 Home DC Inverter Multi VRF Units
122
The guide vane of air channel is not
reasonably manufactured.
Uneven air quantity allocation reduces the overall performance of
the air conditioner.
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.
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.
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.
The ODU is installed in an improper
place.
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.
Power cables are incorrectly provided.
Unit components may be damaged and potential safety hazard
may occur.
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.
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.
Circulating inlet/outlet pipe of hydro
box is blocked; floor heating pipe is
blocked; water pipe at user side is
blocked; or there are impurities in
water system;
Water heating/floor heating effect gets worse; pump of hydro box
is broken or hydro box occurs water flow switch protection or the
complete unit occurs high pressure protection;
There is air in the circulating
inlet/outlet pipe of hydro box; there is
air in the floor heating pipe; there is air
in the water pipe at user side; there is
air in the water tank;
Water heating/floor heating effect gets worse; pump of hydro box
is broken or hydro box occurs water flow switch protection or the
complete unit occurs high pressure protection;
Auto vent valve is not installed at the
top of water system
There is air in the waterway. Water heating/floor heating effect
gets worse; pump of hydro box is broken or hydro box occurs
water flow switch protection or the complete unit occurs high
pressure protection;
The hydro box is not installed in indoor
places
When the temperature is winter is too low, the hydro box may get
frozen easily;
Insulation hasnt been done to the
water system pipeline
When the temperature is winter is too low, the hydro box may get
frozen easily;
The resistance of floor heating water
system is too big, but engineering
water pump is not installed
Floor heating effect gets worse and floor heating engineering
water pump shall be installed;
Floor heating embedded pipe hasnt
been designed according to the
requirement; the distance between two
floor heating pipes is too big or the
diameter of floor heating pipe is too
small
Floor heating effect gets worse and energy consumption
increases;
Water makeup pipe of circulating water
of hydro box hasnt installed pressure
relief device
The water pressure inside circulating pipe of hydro box is too big;
safety valve of hydro box leaks and causes water accumulation,
which affects water heating effect;
When the hydro box is connected to
the water tank or floor heating,
waterway solenoid valve C and valve
D haven’t been installed; or the
selected solenoid valve is not straight
through, whose resistance is too big
Water heating/floor heating effect gets worse and energy
consumption increases;
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.
3.1.3 Cooperation between different professions
A quality installation of air conditioning engineering depends on careful organization and close
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