– 89 –
Table 10-1 Name and Role of each thermistor
Table 10-2 Correspondence between each thermistor's
resistance and temperature (reference value)
Electric expansion valve
thermistor
DEF thermistor
-15˚C
12.6k
Ω
1.0V
1.7V
3.0V
3.9V
1.0V
1.7V
2.4V
3.1V
4.4V
0.5V
1.3V
2.4V
3.4V
3.6V
3.9V
6.1k
Ω
2.2k
Ω
860
Ω
400
Ω
0˚C
25˚C
50˚C
75˚C
Outdoor temperature
thermistor
Temperature
25˚C
50˚C
75˚C
100˚C
105˚C
118˚C
Temperature
-15˚C
0˚C
15˚C
30˚C
Temperature
Resistance
33.9k
Ω
10.8k
Ω
4.1k
Ω
1.7k
Ω
1.5k
Ω
1k
Ω
Resistance
12.6k
Ω
6.1k
Ω
3.2k
Ω
2k
Ω
Resistance
Potential
Potential
Microcomputer
pin potential
OH thermistor
Name
OH thermistor
Compressor head
If the temperature of the compressor
rises abnormally (118˚C), the
compressor will be stopped. The
temperature is used to decide the
operation of the valve.
The thermistors decide the defrost
operation during heating combined
the data of the outside temperature
and its data.
The thermistors detect the
temperatures of the piping to the
indoor units. The temperatures are
used to decide how much the
expansion valve is opened.
Outdoor temperature is used to
decide the various operations of the
air conditioner.
C N 5
DEF thermistor
Heat exchanger
C N 6
Outdoor temperature
thermistor
Outside temperature
C N 7
Electric expansion valve
thermistor
(NARROW PIPE 1)
Indoor unit 1
(NARROW PIPE)
Electric expansion valve
thermistor
(NARROW PIPE 2)
Indoor unit 2
(NARROW PIPE)
Electric expansion valve
thermistor
(NARROW PIPE 3)
Indoor unit 3
(NARROW PIPE)
C N 8
Electric expansion valve
thermistor
(WIDE PIPE 1)
Indoor unit 1
(WIDE PIPE)
Electric expansion valve
thermistor
(WIDE PIPE 2)
Indoor unit 2
(WIDE PIPE)
Electric expansion valve
thermistor
(WIDE PIPE 3)
*
"
*
" mark is for model RAM-53QH5 only.
Remark :
*
Table 10-2 shows the correspondence between
the thermistor's resistance and the temperature.
They should be used as reference values. The
value, which you measure, may be slightly
difference from that in the table. It depends on
the instrument.
Indoor unit 3
(WIDE PIPE)
C N 9
Connector No
Measuring Point
Role
When you measure the resistance, pull out the
connector after turning off the power supply.
Pulling out the connector while the power supply
is turned on will cause troubles.
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 ...