28
29
7 minutes later, the compressor running frequency will be controlled as below:
+5.0
+4.5
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
H
G
H
F
E
D
C
B
A
+0.5
I3HEAT
I2HEAT
I1HEAT
Off
Decrease
Hold
Resume
Temp. zone
A
B
C
D
E
F
G
Frequency
F10
F9
F8
F7
F5
F3
F1
▲
T = 0°C as default.
Note:
When T
1
-Ts remains in the same temperature zone for 3 minutes, the compressor will run according to the following:
A~E: Increase the frequency to the higher level until to F10.
F: Maintain the current frequency.
G: Decrease the frequency to the lower level until to F1.
H: Run at F1 for 1 hour (if T
1
-Ts-
▲
T > 6°C, the compressor will stop)
Meanwhile, the compressor running frequency is limited by the current.
Note:
When the unit is in the “hold” zone for 3 minutes, the compressor
frequency will rise to the higher level. (The maximum frequency
increase is 200%)
Off:
Compressor stops.
Decrease:
Decrease the running frequency to the lower level.
Hold:
Keep the current frequency.
Resume:
No limitation for frequency.
8.4.3.2 Outdoor fan running rules
8.4.3.3 Indoor fan running rules
If the compressor stops due to the room temperature rising, the
indoor fan will be forced to run for 127 seconds with breeze.
During this period, the anti-cold-wind is disabled.
If the machine runs in rating capacity test mode, the indoor fan
will run with rating speed and the anti-cold-wind function is
disabled.
Indoor fan speed can be set as high, medium, low or auto fan and
the anti-cold-wind function is optional.
Auto fan action in heating mode:
17
15
Low
High
44
38
37
34
33
Setting
Low
Breeze
Off
17
8.4.3.4 Defrosting mode
Condition of defrosting:
T
4
> 0°C,
When the unit is running, if the following two conditions are met,
the unit starts defrosting:
• The unit runs with T
3
< 3°C for 40 minutes and T
3
keeps lower
than TCDI°C for more than 3 minutes.
• The unit runs with T
3
< 3°C for 80 minutes and T
3
keeps lower
than TCDI + 2°C for more than 3 minutes and TCDI = – 6°C.
T
4
< 0°C,
If the 1st and 2nd conditions are met, then the program
determines if T2 has decreased by more than 5°C. When T
2
has decreased by more than 5°C, it will automatically enter the
defrosting mode.
No matter what value T
4
is, if the machine runs with T
3
< 3°C for
more than 120 minutes and T
3
remains lower than TCDI + 4°C for
more than 3 minutes, the machine will enter the defrosting mode
no matter if T
2
drops by more than 5°C or not.
Condition of ending defrosting:
If any one of the following conditions are met, the defrosting will
fi nish and the machine will return to normal heating mode.
• T
3
rises to be higher than TCDE1°C.
• T
3
remains higher than TCDE2°C for 80 seconds.
• The machine has run for 10 minutes in defrosting mode.
While TCDE1 = 12°C, TCDE2 = 8°C for LNIV2610.
TCDE1 = 15°C, TCDE2 = 8°C for other models.
E963_Lennox Luna Inverter Service Manual 3.indd 28-29
E963_Lennox Luna Inverter Service Manual 3.indd 28-29
23/01/12 9:28 AM
23/01/12 9:28 AM
