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G. Thermistor Check
To check thermistor resistance, follow the steps below.
1) Turn off the power supply.
2) Remove the front panel, then move the control switch to the "OFF" position.
3) Remove the control box cover.
4) Remove the thermistor.
5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min.
6) Disconnect the thermistor connector from CB white K3 connector and check resistance
between thermistor leads. Normal range is 4.7 to 6.2 kΩ. If outside the normal range,
replace the thermistor. See "IV.B. Component Service Information." If within the normal
range, continue to next step.
7) Replace the thermistor in its correct position. See "IV.B. Component Service
Information."
8) Reconnect the thermistor connector to CB white K3 connector.
9) Replace the control box cover in its correct position.
10) Move the control switch to the "ICE" position.
11) Replace the front panel in its correct position.
12) Turn on the power supply.
13) Once the harvest cycle starts (Comp energizes), begin timing the harvest cycle.
14) The harvest timer and harvest cycle should terminate within 2 to 5 min. If the harvest
cycle does not terminate within 2 to 5 min., replace CB.
Legend:
CB
–control board;
Comp
–compressor
Foam Insulation
Thermistor Holder
Thermistor Lead
Cable Tie
Fig. 2
