Ice O Matic GEMU090 Manuel de service
Service Manual
GEMU090 Series
Ice-O-Matic
11100 East 45th Ave
Denver, Colorado 80239
Part Number 9081430-02 Date 9/11
Ice-O-Matic
Parts and Labor
Domestic & International Limited Warranty
Mile High Equipment LLC (the “Company”) warrants Ice-O-Matic brand ice machines, ice dispensers, remote condensers, water filters, and ice storage
bins to the end customer against defects in material and factory workmanship for the following:
Cube ice machines, compressed ice machines and remote
condensers. - Thirty-six (36) months parts and labor
Flake ice machines, GEMD Maker Dispensers, and GEMU
Undercounter compressed ice machines - Twenty-four (24)
months parts and labor
CD model dispensers - Thirty-six (36) months parts and
labor
An additional twenty-four (24) month warranty on parts (excluding labor) will be extended to all cube ice machine evaporator plates and all cube ice and
compressed ice machines, except GEMU machines, compressors from the date of original installation. An additional thirty-six (36) month warranty on
parts (excluding labor) will be extended to all flake ice machine and GEMD maker dispenser compressors from the date of original installation The
company will replace EXW (Incoterms 2000) the Company plant or, EXW (Incoterms 2000) the Company-authorized distributor, without cost to the
Customer, that part of any such machine that becomes defective. In the event that the Warranty Registration Card indicating the installation date has
not been returned to Ice-O-Matic, the warranty period will begin on the date of shipment from the Company. Irrespective of the actual installation date,
the product will be warranted for a maximum of seventy-two (72) months from date of shipment from the Company.
ICE-model cube ice machines which are registered in the Water Filter Extended Warranty Program will receive a total of eighty-four (84) months parts
and labor coverage on the evaporator plate from the date of original installation. Water filters must be installed at the time of installation and registered
with the Company at that time. Water filter cartridges must be changed every six (6) months and that change reported to the Company to maintain the
extended evaporator warranty.
No replacement will be made for any part or assembly which (I) has been subject to an alteration or accident; (II) was used in any way which, in the
Company’s opinion, adversely affects the machine’s performance; (III) is from a machine on which the serial number has been altered or removed; or,
(IV) uses any replacement part not authorized by the Company. This warranty does not apply to destruction or damage caused by unauthorized service,
using other than Ice-O-Matic authorized replacements, risks of transportation, damage resulting from adverse environmental or water conditions,
accidents, misuse, abuse, improper drainage, interruption in the electrical or water supply, charges related to the replacement of non-defective parts or
components, damage by fire, flood, or acts of God.
This warranty is valid only when installation, service, and preventive maintenance are performed by a Company-authorized distributor, a Compa nyauthorized service agency, or a Company Regional Manager. The Company reserves the right to refuse claims made for ice machines or bins used in
more than one location This Limited Warranty does not cover ice bills, normal maintenance, after-install adjustments, and cleaning.
Limitation of Warranty
This warranty is valid only for products produced and shipped from the Company after March 1, 2010. A product produced or installed before that date
shall be covered by the Limited Warranty in effect at the date of its shipment. The liability of the Company for breach of this warranty shall, in any case,
be limited to the cost of a new part to replace any part, which proves to be defective. The Company makes no representations or warranties of any
character as to accessories or auxiliary equipment not manufactured by the Company. REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS
WARRANTY IS THE EXCLUSIVE REMEDY OF THE CUSTOMER. MILE HIGH EQUIPMENT SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS PRODUCT. EXCEPT TO THE EXTENT
PROHIBITED BY APPLICABLE LAW, ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON
THIS PRODUCT IS LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY.
Filing a Claim
All claims for reimbursement must be received at the factory within 60 da ys from date of service
time period will be void. The model, the serial number and, if necessary, proof of installation, must be included in the claim. Claims for labor to
replace defective parts must be included with the part claim to receive consideration. Payment on claims for labor will be limited to the published labor
time allowance hours in effect at the time of repair. The Company may elect to require the return of components to validate a claim. Any defective part
returned must be shipped to the Company or the Company-authorized distributor, transportation charges pre-paid, and properly sealed and tagged. Th e
Company does not assume any responsibility for any expenses incurred in the field incidental to the repair of equipment covered by this warranty. The
decision of the Company with respect to repair or replacement of a part shall be final. No pe rson is authorized to give any oth er warranties or to assume
any other liability on the Company’s behalf unless done in writing by an officer of the Company.
GOVERNING LAW
This Limited Warranty shall be governed by the laws of the state of Delaware, U.S.A., excluding their conflicts of law principles. The United Nations
Convention on Contracts for the International Sale of Goods is hereby excluded in its entirety from application to this Limited Warranty.
Mile High Equipment LLC, 11100 East 45
Ice storage bins -Twenty-four (24) month parts and labor
IOD model dispensers - Twenty-four (24) months parts, Twelve (12) months
labor
Water filter systems - Twelve (12) months parts and labor (not including filter
cartridges)
to be eligible for credit. All claims outside this
th
Avenue, Denver, Colorado 80239 (303) 371-3737
August 2011
GEMU090
Service
GEM090 service
This section contains information for the service
and repair of the GEMU090 ice machine.
Service Table of Contents
GEM090 service .............................................Page 1
Components: ...............................................Page 2
Evaporator and Auger...........................................Page 3
Control System ..............................................Page 4
Water System ...............................................Page 5
Storage ..................................................Page 6
Performance and Technical Specs ....................................Page 7
Electrical Sequence ............................................Page 8
Service Diagnosis .............................................Page 9
Service Diagnosis .............................................Page 10
Component Diagnostics..........................................Page 11
Ice Capacity ................................................Page 12
Removal and Replacement ........................................Page 13
GEMU090 Gearbox Access & Removal .................................Page 14
Water Seal Replacement .........................................Page 16
Evaporator Replacement .........................................Page 18
Drain Pump (if equipped) .........................................Page 19
Compressor replacement. ........................................Page 20
Bin and Cabinet ..............................................Page 21
Page 1
GEMU090
Service
Components:
Refrigeration system, including air cooled
•
condenser, compressor, capillary tube and
evaporator.
Control system, including ice level sensor,
•
water sensor, auger motor sensor, controller,
control pad and transformer.
Auger drive system, including auger motor,
•
gear reducer and auger.
Auger support system, including top bearing
•
and water seal.
Water system, including the float and
•
reservoir.
Storage system, including ice storage bin,
•
drain and door.
The GEMU090 is a continuous flow ice machine.
When the control system senses that the storage
bin’s ice level is low, it turns on the compressor, fan
motor and auger drive motor.
During ice making the refrigeration system takes
heat from the evaporator. The evaporator is a
vertical refrigerated stainless steel tube containing
water and a slowly rotating auger. When the water
gets to the freezing point, ice begins to form. That
ice is very soft and is pushed up the evaporator
tube by the auger. As ice is made more warm
water enters at the bottom. The soft, mushy ice is
forced up to the top of the evaporator’s tube where
it is forced through nine tapered holes. As the ice is
pushed through the holes excess water is
squeezed out. The ice comes out of the holes
shaped as a rod of ice. The rods of ice are broken
off by being pushed against the tapered flange
above the holes, forming the irregular lengths of
pearl ice. The ice sweep, rotating with the auger,
moves the ice to the ice chute where it falls by
gravity into the storage bin.
Air Cooled
Condenser
Compressor
Liquid Line
Suction Line /
Heat
Exchange
Capillary Tube
Evaporator
Assembly
Auger Drive
System
Refrigeration System Schematic
Page 2
GEMU090
Service
Evaporator and Auger
Ice Outlet
Auger
Bearing
Foam
Insulation
Rotating Half
of Water Seal
Stationary
Half of Water
Heat
Exchange
Tube Coil
Water Inlet
Seal
Cut Away View
Page 3
GEMU090
Service
Control System
The control system operates the machine. The
controller operates on 12 volts AC, supplied by the
transformer. It uses an ultrasonic ice sensor to
measure ice level. The ultrasonic system transmits
sound waves into the ice storage bin and measures
the return time, when the return time is longer than
the preset time for bin full, the controller switches
the ice machine to an ice making mode. During ice
making the compressor, fan motor and auger motor
are operating.
The control system has two safeties: It will not
operate the machine without water and it will not
operate the machine if the auger motor is drawing
too much current or if it isn’t drawing any current.
The water sensor is checking the conductivity of
the water in the water reservoir. If there is no water
in the reservoir the conductivity will be zero and the
controller will either not start ice making or will stop
making ice.
The current or amps of the auger motor are
continually monitored by the controller during ice
making. If the current is too high, indicating an
overload, the controller will stop ice making. If the
current is zero, indicating an auger motor failure,
the controller will also stop ice making.
The control pad has two switches and three lights.
The left switch button is On/Off. The right switch
button is Clean/Reset. The left Ice Making light is a
status light, it is ON when the machine has been
switched to an ice making mode. The center light is
a Water light, it will be ON when the controller has
sensed that there is no water available. It will go
out when the water supply has been restored. The
right light is a Time to Clean indicator light. It is
switched ON by the controller after six months of
power connect time. It will go out after the machine
has been cleaned following the process in the
Maintenance section.
Glows Green when
unit is switched On
On/Off Control Button
Glows Red when there is no water
supplied to the machine
The machine will NOT make ice
when this light is on. It will restart
and the light will go out when the
water supply is restored.
Control Panel
Page 4
Glows Yellow when
it's time to clean the
machine
Clean Button
GEMU090
Service
Water System
The auger is driven at about 11 RPM by the gear
reducer. The gear reducer is a sealed component
and does not require lubrication, as it contains a
charge of grease. The auger motor drives a set of
gears that all together reduce the motor speed to
the 11 RPM output speed and correspondingly
increasing the torque. The output shaft of the gear
reducer is hollow to accept the square end of the
auger.
The auger is one of the key components in this
product. It is a precision machined part cut from
solid stainless steel bar stock. It fits the inside of
the evaporator tube very closely and is aligned by
the gear reducer at the bottom and a self
lubricating bearing at the top.
As ice is made and forced up the evaporator, the
auger is being pushed down. That thrust is
supported by the bearings in the gear reducer.
Those bearings also provide alignment for the
bottom of the auger, keeping it centered in the
evaporator tube. The top bearing provides auger
alignment at the top.
Water is kept from leaking out the bottom of the
evaporator by the water seal. The water seal is the
type of seal called a face seal, with the outside
diameter of a stationary half pressed against
the inside of the evaporator tube and a
rotating half attached to the bottom of
the auger. The sealing action takes
place where the faces of the two
halves rub together.
slightly and water will flow into the reservoir
through the partially open float valve. It will flow in
continually as ice is made.
Water quality. Nearly all water supplies contain
some impurities or minerals. When ice is made
those minerals can remain behind in the ice
machine and coat its surfaces with a hard, stone
like substance known as scale. This scale must
occasionally be removed by scale remover. Scale
remover is a food grade acid that will dissolve the
scale so it can be washed away. Note: it is
important to ALWAYS dilute the scale remover
when using it on this machine. Never use undiluted
scale remover.
Some water treatment devices make very clean
water, Reverse Osmosis is one of those and this
machine may be used with RO water as long as
the conductivity is greater than 10
microsiemens/cm. Use of de-ionized water is not
recommended and will void the warranty.
Water Level
Water Sensor
Float Valve
and Reservoir
Water is the raw ingredient of
ice and it enters this machine
through the compression fitting in
the back. That leads to the float
valve and reservoir. When the float is
not supported by water, the float arm
is down and the attached float valve
is open. As water enters the reservoir, it
also flows into the reservoir’s outlet
tubing which leads to the
evaporator water inlet, filling the
evaporator. The float rises as
the water level is increased until
it has lifted high enough to force
the water valve to close, stopping
the flow of water. When the machine
is making ice, the water level will drop
Hose to
Evaporator
Inlet
Evaporator
Inlet
Hose to drain
Page 5
GEMU090
Ice
Making
Check
Water
Time to
Clean
Clean
Reset
Service
Storage
The ice storage system is made up of a plastic
lined ice storage bin, covered by an insulated top
panel and an insulated swing open door with
gasket. The ice storage bin is foamed in place, so
the side panels are not removable.
Page 6
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