Mitsubishi Electric PURY-80TMU Service Handbook page 75

Note 1 :
• Board connector CN10 corresponds to TH11 through TH14, while connector
CN11 corresponds to TH15 through TS15. Remove the applicable connector
and check the sensor for each number.
Note 2, 3 :
1. Pull the sensor connector from the I/O board. Do not pull on the lead wire.
2. Measure resistance using a tester or other instrument.
3. Compare measured values with values on the graph below. A value within a range of ±10% is normal.
Resistance measurement point (connector)
Temperature sensor resistance (graph)
Resistance value
(kΩ)
Note 4 :
• Check using LED monitor display switch (outdoor MAIN board SW1)
Measured Data
Liquid inlet
temperature
Bypass outlet
temperature
Bypass outlet
temperature
Bypass inlet
temperature
∗ When SW4-5 is turned OFF, "˚F" is indicated, while when SW4-5 is
turned ON, "˚C" is indicated.
Thermistor R =15 kΩ
o
1
Rt=15exp 3460 ( –
273+tc
Temperature ˚C (˚F)
Signal SW1 Setting
1 2 3 4 5 6 7 8 9 10
TH11
ON
1 2 3 4 5 6 7 8 9 10
TH12
ON
1 2 3 4 5 6 7 8 9 10
TH15 ON
1 2 3 4 5 6 7 8 9 10
TH16
ON
Touch the probes of the tester or other instrument
to the shaded areas to measure.
1
)
273+o
Note : For more easier readings of temperature
scale convert to ˚C.
Remarks
See converter.
See converter.
See converter.
See converter.
–74–
9
˚F = ˚C + 32
5