Haier AB242ACBEA Service Manual page 91

Commercial air conditioning 24 28 universal outdoor unit air conditioning
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10.2 Trouble Shooting - Detailed for engineer
Malfunction flow chart: analyze and diagnose
If the air-condition fails to cooling or heating function and other functions, please check
the system as follows:
 
1.Cooling 
begining
fails in cooling
condensate
flowage failure
airiness circle
improperly
the enactment TEMP.
right or not
N
the cooling load
beyond the allowable
arange
Y
fault in 4-way vavle
N
quantity of condensate
charge is not enough
N
Y
compressor fault
Y
fan speed at
low-speed
N
Y
air entrance filter
obstruct
heat insulation of condensate
pipeline between indoor unit
and outdoor unit is normal
Figure 7-1
-50-
Y
change the designed
TEMP.
Y
use arange is right
or not
change the
4-way vavle
Y
superaddition condensate
replacing compressor
enact fan speed of
high or middle speed
clear the filter
Y
insulate the two
pipeline respective
Y
redesign the TEMP.

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