Haier H-MRV Series Service Manual page 101

≤-5
-4
-3
-2
tolerance -1
E 0
(K)
1
2
3
4
≥5
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
Changing speed of overheat value（K/10sec）
≤-2 -1
-5 -5
-5 -4
-4 -3
-3 -2
-2 -1
-1 0
0 1
1 2
2 3
3 4
4 5
-101-
>a__WcU[S^ <[c >a`V[e[a`Wc
0 1
-4 -2
-3 -1
-2 0
-1 0
0 0
0 1
0 2
1 3
2 4
3 5
4 6
≥2
-1
0
0
1
2
3
4
5
6
6
6