Outdoor Unit Functional Concept
ESIE06-03
2–18
Part 2 – Functional Description
3
1
2
4
5
3.6
Input Current Control
Outline
The microcomputer calculates the input current during the compressor is running, and set the
frequency upper limit from such input current.
This control is the upper limit control function of the frequency which takes priority of the lower limit of
four way valve activating compensation.
Graph
Frequency control
in each zone
P
Drooping zone
P
The maximum limit of the compressor frequency in this control is defined as operation frequency
- 2Hz.
P
After this, the output frequency is pulled down by 2Hz every second until it reaches the steady
zone.
P
Keep zone
P
The present maximum frequency goes on.
P
Reset zone
P
Limit of the frequency is cancelled.
P
Stop zone
P
After 2.5 s in this zone, the compressor is stopped.
Limitation of
current drooping
and stop value
according to the
outdoor air
temperature
P
In case the operation mode is cooling
The current droops when outdoor air temperature becomes higher than a certain level.
P
In case the operation mode is heating
The current droops when outdoor air temperature becomes higher than a certain level.
Compressor Stop
Drooping Zone
Stop Zone
Keep Zone
Reset Zone
I4
I3
I3 –I
α
Cooling
Heating
50 class
60 class
71 class
50 class
60 class
71 class
I4
(A)
20
20
I3
(A)
Normal mode
-
-
15.75
-
-
17.5
I3-I
α
(A)
Normal mode
-
-
14.75
-
-
16.5
Summary of Contents for Altherma EKHBH Series
Page 2: ...ESIE06 03 1 2 Part 1 System Outline 3 1 1 5 ...
Page 26: ...Functional Diagrams ESIE06 03 1 26 Part 1 System Outline 3 1 1 4 5 ...
Page 32: ...Piping Diagrams ESIE06 03 1 32 Part 1 System Outline 3 1 1 4 5 ...
Page 38: ...Switch Box Layout ESIE06 03 1 38 Part 1 System Outline 3 1 1 4 5 ...
Page 58: ...PCB Layout ESIE06 03 1 58 Part 1 System Outline 3 1 1 4 5 ...
Page 60: ...ESIE06 03 2 2 Part 2 Functional Description 3 1 2 5 ...
Page 68: ...Hydro box Functional Concept ESIE06 03 2 10 Part 2 Functional Description 3 1 2 4 5 ...
Page 88: ...ESIE06 03 3 2 Part 3 Troubleshooting 3 1 3 5 ...
Page 134: ...Error Codes System Malfunctions ESIE06 03 3 48 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 152: ...Additional Checks for Troubleshooting ESIE06 03 3 66 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 154: ...ESIE06 03 5 2 Part 5 Disassembly and Maintenance 3 1 5 ...