SiBE811001EB
Field Setting
CONVENI-PACK
110
(10) INV. Compressor Load-up Rate Setting
This is a field setting to increase the frequency increment and to speed up cooling when there is a significant difference
between the target evaporative temperature and the actual evaporative temperature at pull down or other operations.
INV. compressor load-up rate change conditions (Refer to next page for details)
h
Control contents
The frequency increment of the compressor is increased when all the following 3 conditions are met.
Normal: 3 step-up
⇒
1-4 step-up (can be changed according to No. 3-41 in the following table)
h
Control conditions
Note:
When the following problems occur, change the setting according to "No. 3-41" and "No. 3-04"
in the following table to make an adjustment.
1. The frequency may be frequently increased and decreased in a equipment that has a
significant load change, resulting in hunting of the low-pressure.
2. With an extremely light load, the thermostat is turned OFF when the frequency is increased
and does not operate while the guard timer is operating. Therefore, the indoor unit
temperature may rise.
3. If the pressure is high or drooping control is working due to a high discharge pipe
temperature or other reason, the compressor does not step up even when the above
conditions are met.
4. When there is a significant load change during heating operation, the frequency may be
frequently increased and decreased, and that may cause unstable heating capability.
Setting method
The numbers in the "No." column represent the number of times to press the BS2 button.
&
LP >
Lp limit value (MPa)
(can be changed according to No. 3-04 in the following table)
Target evaporative temperature - Actual evaporative temperature (saturation temperature of low
pressure)
≥
3 deg + 3 - 05
When the compressor is not fully loaded
No.
Display of setting items
Display of setting conditions
Setting items
H1P H2P H3P H4P H5P H6P H7P
3-41
Changing INV. compressor load-up
rate
(Enhancing flexibility of field setting
of INV. compressor load-up rate)
k
k
h
k
h
h
k
3-04 Condition of LP for load-up
k
h
h
h
k
h
h
LRYEQ16AY1(E)
H1
H2
H3
H4
H5
H6
H7
Set 0 (Factory setting) Number of steps + 3
k
h
h
h
h
h
k
Set 1
Number of steps + 2
k
h
h
h
h
k
h
Set 2
Number of steps + 4
k
h
h
h
k
h
h
Set 3
Number of steps + 1
k
h
h
k
h
h
h
H1P H2P H3P H4P H5P H6P H7P
LP1 > 0.0294 + Minimum Hz LP (factory setting)
k
h
h
h
h
h
k
LP1 > 0.196MPa
k
h
h
h
h
k
h
LP1 > 0.245MPa
k
h
h
h
k
h
h
LP1 > 0.294MPa
k
h
h
k
h
h
h
Ta
Minimum Hz LP
Ta > -21
0.196MPa
Ta
≤
-21
0.157MPa
