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164
Compressor
4-Way valve
Outdoor fan
10S
10S
X2
X1
31.4. Defrost Termination
Defrost will terminate if:
T2 is greater than 64.4°F.
T3 is between 64.4°F and 43.4°F for 80 seconds.
System has been in defrost for 10 minutes.
0
10
15
29 < 30 35
40
2 Hours
Run-time count starts
T3 time
mea-
sured
and T3
temp
deter-
mined
14 minutes
6 min
5 min
After first 15 minutes of
operation, if T3 <
19.4°F then defrost,
otherwise monitor T3
for next 14 minutes.
After 36 minutes of
run-time T3 < 23°F and
T3+5.4°F is still less than
or equal to T30.
2 hours have passed
and T3 < 5°F.
This formula depends on humidy. The higher the humidity, the more frequent the defrost cycles. With no humidity, there
will be less frost build-up. Defrost is a function of humidity.
After 29 min-
utes of run-time
T3 < 19.4°F
and T3+5.4°F is
still less than or
equal to T30.
After 40 minutes of run-time
T3 < 11.2°F.
31.5. Outdoor Fan Control
31.5.1. Cooling Mode
Normally the system will choose the running fan speed according to ambient temperature:
T4
A
DC_FAN_HI_SPD_ADD
B
DC_FAN_MID_SPD_ADD
C
DC_FAN_MIN_SPD_ADD
D
DC_FAN_SLOW_SPD_ADD
E
DC_FAN_SSLOW_SPD_ADD
23
℃
22
℃
20
℃
28
℃
19
℃
17
℃
26
℃
25
℃
Содержание MWMA009S4-*L
Страница 105: ...105 Error Code E2 continued Check point button press 1 time to check how many indoor units are connected ...
Страница 110: ...110 Error Code E5 continued IPM for 4 zone P N for 2 zone and 3 zone IPM for 2 zone and 3 zone ...
Страница 111: ...111 Error Code E5 continued P N for 4 zone Bridge rectifier for 2 zone and 3 zone Bridge rectifier for 4 zone ...
Страница 113: ...113 Error Code E6 continued Two terminals of the inductor Inductor ...
Страница 118: ...118 Error Code P1 continued ...
Страница 120: ...120 Error Code P2 continued ...
Страница 122: ...122 Error Code P3 continued ...
Страница 144: ...144 Error Code P0 continued P U P V ...
Страница 145: ...145 P W P N ...
Страница 151: ...151 Error Code P6 continued ...