Changing speed of overheat value
(
K/10sec
)
≤
-2 -1 0
1
≥
2
≤
-5
-5 -5 -4 -2 -1
-4 -5 -4 -3 -1 0
-3 -4 -3 -2 0 0
-2 -3 -2 -1 0 1
-1 -2 -1 0 0 2
0 -1 0 0 1 3
1 0 1 0 2 4
2 1 2 1 3 5
3 2 3 2 4 6
4 3 4 3 5 6
tolerance
E
(K)
≥
5
4 5 4 6 6
3.3 Adjust valve speed X: according to the last open angle, calculation interval is 10 seconds.
4. Outdoor fan motor control
4.1 Compressor shutoff, after the outdoor motor blow the remaining heat at low speed, the unit will
shut off.
4.2 Temperature control tolerance:
±
1
℃
, fan speed change interval : more than 45 seconds.
4.3 Outdoor motor output control (to adjust the fan speed according to the ambient temperature Ta
and the coil temperature Tc)
Startup stage in cooling:
Ta
>
16
℃
, high speed.
Ta
≤
16
℃
, low speed.
Cooling mode, dehumidification:
Ta
>
32
℃
, high speed.
Ta
<
31
℃
, Tc
>
45
℃
, high speed.
Ta
<
31
℃
, 40
℃<
Tc
<
44
℃
, med speed.
Ta
<
31
℃
, Tc
<
39
℃
, low speed.
Low ambient cooling:
Ta
<
15
℃
, Tc
<
30
℃
, fan motor stops.
Tc
>
50
℃
, fan motor runs for 20 seconds at low speed.
Startup stage in heating:
Ta
≥
20
℃
, low speed.
Ta
<
20
℃
, high speed.
Heating:
Ta
>
17
℃
,
HP of indoor running units
≤
1HP, runs for 60seconds at low speed, and shutoff for
120seconds.
HP of indoor running units
>
1HP, low speed.
17
℃>
Ta
>
15
℃
, low speed.
14
℃>
Ta
>
10
℃
, med speed.
Ta
<
9
℃
, high speed.
4.4 Defrost period: outdoor fan motor shuts off.
5. Electric heater control
>a__WcU[S^ <[c >a`V[e[a`Wc
-101-
Summary of Contents for H-MRV AF092FCBHA
Page 121: ... _ VbTZR Zb _ UZdZ_ Vb AU242FHBHA PCB top layer printed diagram 121 ...
Page 122: ... _ VbTZR Zb _ UZdZ_ Vb AU242FHBHA PCB bottom layer printed diagram 122 ...
Page 127: ... _ VbTZR Zb _ UZdZ_ Vb AU482FIBHA high voltage PCB printed diagram 127 ...
Page 131: ... _ VbTZR Zb _ UZdZ_ Vb AU482FIBHA low voltage PCB printed diagram 131 ...
Page 152: ... a__WcU S c a V e a Wc AB092 182FCBHA PCB printed diagram 152 ...
Page 156: ... a__WcU S c a V e a Wc AE FCBKA PCB printed diagram 156 ...
Page 199: ...MEMO Commercial Air Conditioner ...