Cooper & Hunter CHV-5S224SNMX, Service Manual

Page: 54 / 125

INSTALLATION 0 52 0
CHV
5 COM PACT MULTI VRF UNIT
SERVICE M ANUAL
impurities were mixed with the lubricating oil
7
Refrigerant pipe exceeds the
limit.
The loss in pipe is considerable and the unit energy efficiency
decreases, which are harmful for long-term running of the system.
8
Incorrect amount of refrigerant
is filled.
The system cannot correctly control the flow allocation; the
compressor may be operating under over-heating environment or
running when the refrigerant flows back to the compressor
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