Mitsubishi Electric PUHY-200YMF-B Service Handbook page 119

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
Heat exchanger
outlet temperature
Head exchanger
inlet temperature
Bypass outlet
temperature
Bypass inlet
temperature
Temperature (˚C)
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
TH13
ON
1 2 3 4 5 6 7 8 9 10
TH14
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.
Thermistor R
Rt=15exp 3460 (
Remarks
See converter.
See converter.
See converter.
See converter.
See converter.
See converter.
–117–
=15 kΩ
o
1 1
– )
273+t 273t