24
8.7.4 Outdoor unit current control in heating mode.
8.7.5
If
60 , the compressor will stop and not resume until T2 48 .
9.7.
f defrosting.
When the units are running, if the following two items are satisfied the units start
defrosting:
nits runs with T3 3 for 40 minutes and T3 keeps lower than -6 for
more than 3 min
nits runs with T3 3 for 80 minutes and T3 keeps lower than -4 for
tes.
The program judges according to the condition 1, if the two items are satisfied, then judges
if T2 has
descended for more than 5 , if it has the machine starts defrosting, or continues to judge T2
and will
s lower than -2 for more than 3 minutes, the machine will defrost, no matter if T2 drops for more than 5 or
not.
If any one of following items is satisfied, defrosting will finish and the machine will turn to normal
heating
mode.
econds.
c)
The machine has run for 10 minutes in defrosting.
.7.7 Defrosting action
I3HEAT
I2HEAT
I1HEAT
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
out
door unit
curr
ent
Indoor heat exchanger high temperature protection.
T2
6 Defrosting mode
1)
Condition o
Condition 1:
If T4 0 ,
a) The u
utes.
b) The u
more than 3 minu
Condition 2:
If T4 0 ,
not defrost until T2 drops more than 5 .
Condition 3:
No matter what value T4 is, if the machine runs with T3 3 for more than 120 minutes and T3
keep
2)
Condition of ending defrosting.
a)
T3 rises to be higher than 12 .
b)
T3 rises to be higher than 8 and remains for 80 s
8
Summary of Contents for MSC-24/QD FP
Page 8: ...6 3 Dimension 3 1 Indoor Unit MSC 24 QD FP MSH 24 QD FP...
Page 9: ...7 3 2 Outdoor Unit MSC 24 QD FP...
Page 11: ...9 5 Refrigerant cycle diagram...
Page 12: ...10 6 Wiring diagram 6 1 Indoor Unit MSC 24 QD FP MSH 24 QD FP...
Page 13: ...11 6 2 Outdoor Unit MSC 24 QD FP...
Page 37: ...35...
