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Outdoor Unit Functional Concept
ESIE06-03
2–16
Part 2 – Functional Description
3
1
2
4
5
3.4
Controls at Mode Changing / Start-up
Four way valve
operation
compensation
Heat pump
At the beginning of the operation as the four way valve is switched, acquire the differential pressure
required for activating the four way valve by having output the operating frequency, which is more than
a certain fixed frequency, for a certain fixed time.
Starting conditions
P
The MRC/W turns ON when the compressor starts for heating after the MRC/W has been OFF with
compressor halted.
P
The MRC/W turns OFF when the compressor starts for cooling after the MRC/W has been ON with
compressor running.
P
The compressor starts for the first time after reset.
P
The compressor starts after suspension caused by the trouble of cooling/heating changeover. Set
the lower limit frequency to 48 Hz for 70 seconds with any conditions 1 through 4 above.
3 minutes stand-by
Prohibit to turn ON the compressor for 3 minutes after turning it off. Except when defrosting.
Compressor
protection function
When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows.
The function must not be used when defrosting.
FCG 3
85
FCG 2
70
FCG 1
55
Frequency
FCG3
FCG2
FCG1
Time
TCG470 sec
TCG200 sec
TCG120 sec
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 ...