Hoshizaki KM-320MAH, KM-320MWH service manual Removal and Replacement of Thermistor

H. Removal and Replacement of Thermistor

CAUTION

1.Fragile, handle very carefully.

2.Always use a recommended sealant (High Thermal Conductive Type), Model KE4560RTV manufactured by SHINETSU SILICONE, Part Code 60Y000-11, or Part Code 4A0683-01 equivalent.

3.Always use a recommended foam insulation (Non-absorbent Type) or equivalent.

4.Do not shorten or cut the thermistor leads when installing it.

1)Turn off the power supply.

2)Remove the panels.

3)Remove the control box cover.

4)Disconnect the thermistor leads from the K3 connector on the controller board.

5)Remove the plastic cable ties, foam insulation, thermistor holder and thermistor. See Fig. 1.

6)Scrape away the old sealant on the thermistor holder and the suction pipe.

7)Wipe off moisture or condensation on the suction pipe.

Thermistor Lead Cable Tie

Foam Insulation Thermistor Holder

Fig. 1

8)Smoothly apply recommended sealant (KE4560RTV, Part Code 60Y000-11 or 4A0683‑01) to the thermistor holder concave.

9)Attach the new thermistor to the suction pipe very carefully to prevent damage to the leads. And secure it using the thermistor holder and recommended foam insulation.

10)Secure the insulation using the plastic cable ties.

11)Connect the thermistor leads through the bushing of the control box to the K3 connector on the controller board.

Note: Do not cut the leads of the thermistor while installing it.

12)Replace the control box cover and the panels in their correct positions.

13)Turn on the power supply.

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