Gree CN851W1000, Руководство по обслуживанию

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160
DC Inverter Multi
VRF Service Manual
S/N
Class
T
rouble
Possible Cause
T
roubleshooting
First-level reason
Second-level reason
Third-level reason
Description of Cause
Method of
Confirmation
Description of Cause
Method of Confirmation
Description of Cause
Method of
Confirmation
7
Dischar
ge
temp is
abnormal
Dischar
ge
temp is
superhigh
4.Pipeline of the
system is blocked
Dischar
ge temp of the
system abnormally
increases and the
low pressure is too
low(Judge according
to reference standard).
4.1 Liquid pipe of the
system is blocked.
Along the flow
direction of refrigera
nt
s,
the dif
ference of
local temperatures is great or there is frost
on partial pipe.
——
——
Replace and weld
pipeline again.
8
4.2 Low pressure gas pipe
of the system is blocked.
——
——
Replace and weld
pipeline again.
9
4.3
The connecting pipe
of indoor unit is blocked.
Along the flow
direction of refrigera
nt
s,
the dif
ference of
local temperatures is great or there is frost
on partial pipe.
4.4.1 The
welding
causes block.
Cut the pipe
to check.
Replace and weld
pipeline again.
10
4.4.2
There are too many
impurities inside the pipeline.
Replace and weld
pipeline again.
11
5. Refrigerants
of the system are
inadequate.
Dischar
ge temp of the
system abnormally
increases and the
low pressure is too
low(Judge according
to reference standard).
5.1 The
volume
of refrigerants is
not calculated or
added according to
requirements.
——
——
——
Add refrigerants
according to
requirements.
12
5.2 Leak of the pipeline
causes the insufficiency
of the refrigerants.
Check it with leak
detector of refrigerants.
——
——
Handle the leak and
vacuumize the pipe
again and char
ge
the refrigerants.
13
6.
The type of
the refrigerants
added is wrong.
Stop the complete unit and check the
equalizing pressure
of high and low
pressures after 20
min. Then,
transfer
the pressure value
to the corresponding
saturation temp and
compare it with outdoor
ambient temp. If the
temp dif
ference is more
than 5
, it is abnormal.
——
——
——
——
Release the
refrigerants inside
the system and
rechar
ge the correct
refrigerants.
14
7. The
inspection
of dischar
ge temp
sensor is wrong.
——
——
——
Replace temp
sensor or
mainboard.
15
8. Ambient
temp
exceeds the range
for safe running.
——
Ambient temp is
more than 48
.
Collect ambient
temp on spot.
——
——
Normal
phenomenon.