– 59 –
Power
Heating output
Cooling output
Compressor
rotation speed
Unit 1
Unit 2
Hold
Hold
Hold 500ms
Hold 500ms
Hold 500ms
Hold
Hold
Hold
Hold
PSTARTC2$
PSTARTC2$
Initialization finished
PSTARTC2$
PSTARTC2K$
< TD control + N correction + distribution control >
31.25pps
Start enabled
approx. 100ms
Start sequence
SDSTEP min
-1
/TSKSPT
sec.
CMAX2
Cooling
Cooling
Cooling
100ms
1s
1s
1s
Unit 3
520
480
0
520
480
0
520
480
0
Outdoor fan
Turns on
for cooling
Turns on
for heating
Operation
Power
Rush-in
prevention
Compressor
P
o
w
er rela
y
Expansion valv
e
R
e
ver
sing
valv
e
Unit 1
Unit 2
Unit 3
Outdoor temperature
≥
40˚C
PSTARTC2K$
Outdoor temperature
≥
40˚C
TSKTMI_C1
Outdoor temperature
≥
STARCTP_C
TSKTMI_C2
Outdoor temperature
≤
STARCTP_C
SDRCTI_C1
Outdoor temperature
≥
STARCTP_C
SDRCTI_C2
Outdoor temperature
≤
STARCTP_C
PSTARTC2K$
Outdoor temperature
≥
40˚C
< TD control + N correction + distribution control >
< TD control + N correction + distribution control >
MODEL RAM-53QH5
Expansion valves
The expansion valves are initialized when power is supplied. The valve for unit 1 is fully closed (–520
pulses), and then that for unit 2 is fully opened (480 pulses). The valve for unit 2 is fully closed (–520
pulses), and then that for unit 3 is fully opened (480 pulses). When the valve for unit 1, 2, 3 is fully
closed (0 pulse), start-up is possible.
The start openings are held during the steady speed period when the compressor is started. After the
steady speed period is finished, the TD control is entered. The start openings are set to PSTARTH when
the outdoor temperature at start 40˚C or more, and to PSTART when it is less than 40˚C.
Compressor rotation speed
When the compressor is started, the SDRCT1 speed / TSTKTM1 second is held.
After the steady speed period is finished, the speed increases at the rate of SDSTEP speed / TSKSPT
second until the target speed is resched.
TSKTM1, SDRCT1, SDSTEP, TSKSPT, CMAX2, PSTART and PSTARTH are EEPROM data.
Содержание RAM-52QH5
Страница 16: ... 15 MODEL RAM 52QH5 ...
Страница 17: ... 16 MODEL RAM 53QH5 ...
Страница 30: ... 29 CAPACITY DIAGRAM RELATED TO THE PIPING LENGTH MODEL RAM 53QH5 ...
Страница 36: ...CIRCUIT DIAGRAM MODEL RAM 52QH5 39 L C023 C022 C002 C001 C025 C024 N ...
Страница 37: ...CIRCUIT DIAGRAM MODEL RAM 53QH5 41 L C023 C022 C002 C001 C025 C024 N ...
Страница 40: ... 45 ...
Страница 42: ... 49 Outdoortemperature STAROTP_C TSKTM1_C1 Outdoortemperature STAROTP_C TSKTM1_C2 ...
Страница 43: ... 51 ...
Страница 44: ... 53 ...
Страница 45: ... 55 ...
Страница 46: ... 57 ...
Страница 58: ... 69 REFRIGERATING CYCLE DIAGRAM RAM 52QH5 ...
Страница 59: ... 70 REFRIGERATING CYCLE DIAGRAM RAM 52QH5 ...
Страница 60: ... 71 REFRIGERATING CYCLE DIAGRAM RAM 53QH5 ...
Страница 61: ... 72 REFRIGERATING CYCLE DIAGRAM RAM 53QH5 ...
Страница 64: ... 75 5A ...
Страница 67: ... 78 3 System power Module Circuit ...
Страница 71: ... 82 ...
Страница 72: ... 83 5 Reversing valve control circuit Fig 5 1 ...
Страница 75: ... 86 8 Overload control circuit OVL control circuit Fig 8 1 Overload Control System Configuration Fig 8 2 ...
Страница 87: ... 101 ...
Страница 88: ... 102 ...
Страница 94: ... 108 TROUBLESHOOTING OF THE SYSTEM POWER MODULE ...
Страница 95: ... 109 ...
Страница 96: ... 110 ...
Страница 98: ... 112 three three inlet 3 Cut off the three pipes at the side and bottom of Reversing valve ...
Страница 99: ... 113 ELECTRIC EXPANSION VALVE PIPE THERMISTOR POSITION CHARTS MODEL RAM 53QH5 MODEL RAM 52QH5 ...
Страница 104: ...HITACHI PM NO 0428E Printed in Malaysia RAM 52QH5 RAM 53QH5 ...