Midea MSV1-18HRDN1-QC2F, Service Manual

Page: 24 / 38

21
higher than 15
℃
, the compressor heating cable stopping working.
9.4 Fan-Only Mode
9.4.1 Temperature setting function is disabled, and no setting temperature display.
9.4.2 In this mode, the action of louver is the same as in cooling mode.
9.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24
℃
setting temperature.
9.5 Cooling Mode
9.5.1 After starting, the operation frequency of compressor submits to following rule.
When the machine is running and ∆ T(=room temp. – setting temp.) changes, the frequency of compressor will
rise or descend a grade (7 minutes after starting).
After start, if ∆ T stays in a zone for 3 minutes, the frequency will change as follow:
Zone A : Current frequency rise a grade till the maximum grade.
Zone B: Elevate or keep or descend the frequency of compressor.
Zone H: Compressor stops after running as the minimum frequency for 60 minutes or ∆ T is less than -2
℃
.
9.5.2 Indoor heat exchanger anti-freezing function.
If T2 is lower than 0
℃
, the compressor stops and resumes when T2>5
℃
.
9.5.3 Outdoor unit current control in cooling mode(refer to the parameter table)
H
-1.0
B
3.0
-0.5
3.5
T
1
–
2
4
medium
3.5
3.0
1.5
1.0
℃
high
low
I3COOL
I2COOL
I1COOL
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
o
u
td
o
o
r
u
n
it
c
u
rr
e
n
t
A
∆
T
=
(r
o
o
m
t
e
m
p
)
–
(
s
e
tt
in
g
T
e
m
p
)