Gree CF01000730, Service Manual

Page: 116 / 129

GREE Duct type split Air conditioner Inverter Series
114
Troubleshooting:
Poor cooling/heating
effect
Recheck the refrigerant should be
added for the pipeline of system, and
add the liquid refrigerant from the cut-
off valve of low-pressure air pipe of
module.
No
Check if the cut-off valve
of ODU has been opened to the greatest
flow position?
Yes
Along the flow direction of
refrigerant, touch the pipeline with hand to check
if partial temperature difference is large, if there is
partial frost.
Yes
No
Open the cut-off valve to
the greatest flow position
No
Excide the pipeline to check, after replacing
the pipeline, solder the pipeline.
Check if the indoor and outdoor
ambient temperatures are in consistent
with the requirements of unit?
Under cooling mode, check if the indoor
ambient temperature is over 32
℃
, if it is
over 32
℃
within 1 hour after being started,
it is a normal phenomena; if it's over 32
℃
for over 1 hour after being started, it may be
caused by improper model selection. Check
if the outdoor ambient temperature is over
40
℃
, if it is over 40
℃
, it's a normal
phenomena.
Under heating mode, check if the indoor
ambient temperature is lower than 12
℃
, if it
is lower than 12
℃
within 2 hours after being
started, it is a normal phenomena; if it is
lower than 12
℃
for over 2 hours after being
started, it may be caused by improper model
selection, please conduct model selection
again. Check if the outdoor ambient
temperature is lower than -7
℃
, if it is, it's a
normal phenomena.
Yes
Check if there is short circuit
in air outlet and air return of ODU to cause poor
heat exchange of unit? Check if there is short
circuit in air return of IDU to cause poor heat
exchange of unit?
Yes
Redesign the air flow
organization