Hoshizaki KM-260BWH, Service Manual

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V. REMOVAL AND REPLACEMENT
WARNING
1. This unit should be diagnosed and repaired only by qualified service
personnel to reduce the risk of death, electric shock, serious injury, or
fi re.
2. Move the control switch to the “OFF” position and turn off the power
supply before servicing.
3.
C H O K I N G H A Z A R D :
Ensure all components, fasteners, and
thumbscrews are securely in place after the unit is serviced. Make sure
that none have fallen into the storage bin.
4. Make sure all food zones in the icemaker and storage bin are clean after
the unit is serviced. For cleaning procedures, see “VI. CLEANING AND
MAINTENANCE INSTRUCTIONS”.
1. SERVICE FOR REFRIGERANT LINES
[a] SERVICE INFORMATION
WARNING
1. Repairs requiring the refrigeration circuit to be opened must be
performed by properly trained and EPA-certi fi ed service personnel.
2. Always recover the refrigerant and store it in an approved container. Do
not discharge the refrigerant into the atmosphere.
3. Use an electronic leak detector or soap bubbles to check for leaks. Add
a trace of refrigerant to the system (if using an electronic leak detector),
and then raise the pressure using nitrogen gas (140 PSIG). DO NOT
use R-404A as a mixture with pressurized air for leak testing.
CAUTION
1. Do not leave the system open for longer than 15 minutes when replacing
or servicing parts. The Polyol Ester (POE) oils used in R-404A units can
absorb moisture quickly. Therefore it is important to prevent moisture
from entering the system when replacing or servicing parts.
2. Always install a new drier every time the sealed refrigeration system is
opened.