INTRODUCTION
To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician with the
information needed to install, start up, clean,
maintain, and service this ice maker-dispenser.
The NDE750 is a combination nugget ice maker
and countertop dispenser. A water station is
standard.
The NDE750 ice making section is equipped with
the following features: electronic controls for bin
level and low water; thermostatic expansion valve;
front service for most components; and R-404a
(HP62) refrigerant. The ice dispensing section is a
seamless plastic storage bin, with a stainless steel
ice agitator at the bottom to sweep the ice into the
dispensing chute.
Table of Contents
FOR THE INSTALLER: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . . . . . 6
INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . 9
ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATION: Ice Vending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CLEANING and SANITIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MAINTENANCE AND CLEANING: Auger . . . . . . . . . . . . . . . . . . . . . . . . 17
SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . 18
SERVICE DIAGNOSIS: Condition - Low Ice Production . . . . . . . . . . . . . . . . 21
SERVICE DIAGNOSIS: Condition - Poor or No Ice Dispensing . . . . . . . . . . . . . 22
REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . 24
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . 26
TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY . . . . . . . . . . . . . 28
REFRIGERATION SERVICE: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
This manual was printed on recycled paper.
Keep it for future reference.
Note this symbol when it appears.
It marks a possible hazard.
NDE750
December 1993
Page 1
