Midea MHC-96HWD1N1 - Setting Static Pressure; Static-Curve; Indoor Unit Maintenance

Pay attention to the phase sequence of the power supply. If the
phase sequence is reversed, the compressor will not start.
Meanwhile, the fault indicator of the outdoor electric control
board will light up. For details, see Outdoor unit wring diagram
on the cover plate of the electric control box .
After shifting the phase sequence, power on the unit until the
fault indicator goes out and the compressor starts up normally.
If the supply cord is damaged, it must be replaced by the
manufacturer or its service agent or a similarly qualified person
in order to avoid a hazard.
An all-pole disconnection switch having a contact separation of
at least 3mm in all poles should be connected in fixed wiring.
The appliance shall be installed in accordance with national
wiring regulations.
The temperature of refrigerant circuit will be high, please keep
the interconnection cable away from the copper tube.
NOTE
7. SETTING STATIC PRESSURE
The corresponding table of electronic control dial code and
static pressure range is shown in table 7-1.
10
CAUTION
Before starting the operation, the installer must set the electronic
control dial code based on the actual value of the static pressure
of the product .Otherwise, there will be problems.
For convenient repairing and maintenance, the reserved
inspection orifice should larger than the base of the indoor unit
and the connecting duct is detachable. When remove the base
of air conditioner and the fan motor assembly which are very
heavy, it is necessary that two persons do it together.
9.1 Steps to remove the fan motor assembly
1) Remove the screws around the base of air conditioner till the
base can be removed. (Fig.9-1,9-2)
2) Neaten the wires of motor; only remove the wires of motor from
connector.
3) Remove the detachable duct, and move away.
4) Move away 4 pieces of M8 screws from the front board of air
conditioner. (Fig.9-3)
5) Support the bottom of the fan motor assembly by hand, then
push it up. It needs two persons to do. When the hole on
clapboard of fan assembly is higher than the pin on front board
(Fig.9-4), push the fan motor assembly back about 21mm
(Fig.9-5) to make the hole separate from the pin. Hold the
assembly and slowly draw it down along the guide rail (Fig.9-6),
and then the assembly can be taken out for maintenance and
repairing.
9. INDOOR UNIT MAINTENANCE
8. STATIC-CURVE
MHC-96HWD1N1
(
A
)
Fig.8-1
Table 7-1
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
ENC2
0
1
2
3
High static pressure
Code
0~50
51~80
81~120
121~150
Factory Setting
For Setting Static pressure
3500 3750 4000 4250 4500 4750 5000
0
25
50
75
air flow (m
3
/h)
Static pressure(Pa)
0 1
0
1
High air
Medium air
Low air
Static curve (ENC2) 0
3200 3400 3600 3800 4000 4200 4400 4600 4800
0
20
40
60
80
100
air flow (m
3
/h)
Static pressure(Pa)
0 1
0
1
High air
Medium air
Low air
Static curve (ENC2) 1
3000 3500 4000 4500 5000 5500 6000
0
25
50
75
100
125
150
air flow (m
3
/h)
Static pressure(Pa)
0 1
0
1
High air
Medium air
Low air
Static curve (ENC2) 2
3000 3500 4000 4500 5000 5500
0
50
100
150
200
0 1
0
1
High air
Medium air
Low air
Static curve (ENC2) 3
air flow (m
3
/h)
Static pressure(Pa)
Fig.8-2
Fig.8-3
Fig.8-4