Mitsubishi Electric CRHV-P600YA-HPB Service Handbook page 95

[ VII Control ]
Startup sequence rotation
-2- Initial control
When the power is turned on, the initial processing of the microcomputer is given top priority.
During the initial processing, processing of the operation signal is suspended and is resumed after the initial processing is
completed.
(Initial processing involves data processing by the microcomputer and initial setup of the LEV opening. This process takes up
to two minutes.)
During the initial processing "
Initial Control
-3- Compressor frequency
The upper limit of frequency during the first 30 seconds of operation is 48 Hz.
The upper limit of frequency during the first 90 seconds of operation is 60 Hz.
If the water temperature is controlled based on the outlet water temperature (SW3-3 is set to OFF.), for 90 seconds after the
startup, the compressor will be controlled every 30 seconds so that the frequency fluctuation will be kept within ± 5 Hz.
If the water temperature is controlled based on the external water temperature sensor reading or the inlet water temperature
(SW3-3 is set to ON.), for 90 seconds after the startup, the compressor will be controlled every 30 seconds so that the fre-
quency fluctuation will be kept within ± 10 Hz.
(The above does not apply when the high-pressure is suppressed to protect the system or when the defrost operation is in
progress.)
The amount of frequency change is controlled to approximate the target value that are determined based on the temperature
difference between the current and the preset water temperatures.
The minimum operating frequency is 30 Hz.
The maximum frequency will be determined based on the relationship between the hot water temperature and the heat source
inlet temperature as well as the ON/OFF status of the Energy-save/Maximum capacity contact.
(The values not on listed in the table are interpolated.)
"Energy-save/Maximum capacity" contact is ON.
"Energy-save/Maximum capacity" contact is OFF.
HWE1312A
" will appear on the LED monitor on the MAIN board.
- 8 - 3 2
35 100 100 100
Hot water
45 100 100 100
temperature
60 75 76 77
°C
65 75 75 78
- 8 - 3 2
35 79 69 62
Hot water
45
80 71 66
temperature
60
77 70 67
°C
65 76 70 70
（Maximum frequency of the compressor Hz）
Heat source inlet temp. °C
4 5 7 9 12 15 17
100 100 100 100 100 100 100
100 100 100 100 100 100 100
80 80 80 80 80 80 80
78 78 78 78 78 78 78
（Maximum frequency of the compressor Hz）
Heat source inlet temp.
°C
4 5 7 9 12 15 17
60 58 56 53 50 47 46
63 61 59 57 53 51 49
69 67 65 63 61 59 57
68 68 68 66 62 61 60
- 88 -
22 27 32 37 or above
100 100 100 100
100 100 100 100
80 80 80 80
78 78 78 78
22 27 32 37 or above
43 43 42 42
46 46 45 45
55 53 54 54
57 54 53 54
GB