Lennox LNIV2610 Service Manual page 15

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
+0.5
Temp. zone A B
Frequency F10 F9
▲T = 0°C as default.
Note:
When T -Ts remains in the same temperature zone for 3 minutes, the compressor will run according to the following:
1
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 -Ts-▲T > 6°C, the compressor will stop)
1
Meanwhile, the compressor running frequency is limited by the current.
I3HEAT
Decrease
I2HEAT
I1HEAT
Off: Compressor stops.
Decrease: Decrease the running frequency to the lower level.
Hold: Keep the current frequency.
Resume: No limitation for frequency.
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H
G
F
E
D
C
B
A
C D E F
F8 F7 F5 F3
Off
Hold
Resume
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%)
8.4.3.2 Outdoor fan running rules
Low
17
15
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.
G
Indoor fan speed can be set as high, medium, low or auto fan and
F1
the anti-cold-wind function is optional.
Auto fan action in heating mode:
Setting
44
38
37
34
33
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8.4.3.4 Defrosting mode
Condition of defrosting:
T > 0°C,
4
When the unit is running, if the following two conditions are met,
the unit starts defrosting:
• The unit runs with T
than TCDI°C for more than 3 minutes.
• The unit runs with T
than TCDI + 2°C for more than 3 minutes and TCDI = – 6°C.
T < 0°C,
4
High
If the 1st and 2nd conditions are met, then the program
determines if T2 has decreased by more than 5°C. When T
has decreased by more than 5°C, it will automatically enter the
defrosting mode.
No matter what value T
more than 120 minutes and T
more than 3 minutes, the machine will enter the defrosting mode
no matter if T drops by more than 5°C or not.
2
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 rises to be higher than TCDE1°C.
3
• T remains higher than TCDE2°C for 80 seconds.
3
• 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.
Low
Breeze
Off
< 3°C for 40 minutes and T keeps lower
3 3
< 3°C for 80 minutes and T keeps lower
3 3
2
is, if the machine runs with T < 3°C for
4 3
remains lower than TCDI + 4°C for
3
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