Haier AC122ACERA [338/408] In heating indoor tc high temperature protection

Haier AU182AFERA [338/408] In heating indoor tc high temperature protection
1.8.2 Td high temperature protection
Purpose: make compressor frequency control if the discharging temp. is too high, to lower the discharging
temp. efficiently and ensure the system can run normally.
Sensor detect method: 100 times(the cycle of procedure is about 5ms, detect method for every time:
sample 8 times contineously, sort order and then adopt the average of the 2 middle values), adopt the average.
1.8.3 In heating indoor TC high temperature protection
Indoor heat exchanger temperature will check the indoor coil temperature, if it is over 55ć, the unit will
reduce the compressor motor speed to perform the indoor heat exchanger temperature overhigh protection. If
it is below 48ć, the unit will resume to be normal.
TC
P reduce slowly
55
Q remaining
52
R rise slowly
48
P: reduce at the speed of 1Hz/10s
Q: remain the previous value
R: rise at the speed of 1Hz/10s
1.8.4 Over current protection:
The compressor will stop and alarm if current exceed the 19.0A(E) for 5 seconds contineously during
compressor startup.
If keeping for 10s, the unit stops, 3 minutes later, the unit can
re-startup. If in 60 minutesthe unit occurs alarm for 3 times, the
failure can be eliminated.
quick reduce FQY 2HZ/S
quick reduce FQY 1HZ/S
slow reduce FQY 1HZ/10S
FQY no change
slow rise FQY 1HZ/10S
115ć
114ć
111ć
108ć
105ć
90ć
Di
sc
h
a
r
g
in
g
t
e
m
p
. T
d
1.00I
0.95I
0.93I
0.90I
0.88I
0.85I
Stop immediately, if abnormal stop 3 times in 1 hour, the
unit will stop and alarm.
Reduce FQY rapidly 2HZ/S
Reduce FQY rapidly 1HZ/S
Reduce FQY slowly 1HZ/10S
Remain FQY
Increase FQY slowly 1HZ/10S
Electric control functions
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