Expansion Valves; Compressor Rotation Speed - Hitachi RAM-71QH5 Service Manual

RAM-71QH5
Power Power Power Power Power Power
Unit 1
Unit 2
Unit 3
Unit 4
Operation
Rush-in prevention
Power
Turns on
for heating
Outdoor fan
Compressor
rotation speed
100ms
520
480
0
520
480
0
520
480
0
520
480
0
TSKTM1, SDRCT1, SDSTEP, TSKSPT, CMAX2, PSTART and PSTARTH are EEPROM data.
1S 1S
Initialization
1S
100ms
Start sequence
[TSKTM1_C
*
Steady speed period
[SDRCT1_C
*
[PSTARTC3
[PSTARTC3
[PSTARTC3
[PSTARTC3
– 42 –
Cooling
Cooling
Cooling
Cooling
]
Step up control
—1
[SDSTEP]min
]
/[TSKSPT] sec
<TD control + N compensation + Diving control >
]
*
<TD control + N compensation + Diving control >
]
*
<TD control + N compensation + Diving control >
]
*
<TD control + N compensation + Diving control >
]
*
Target speed