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	Ice storage bins -Twenty-four (24) month parts and labor
condensers. - Thirty-six (36) months parts and labor
Flake ice machines, GEMD Maker Dispensers, and GEMU	IOD model dispensers - Twenty-four (24) months parts, Twelve (12) months
Undercounter compressed ice machines - Twenty-four (24)	labor
months parts and labor
CD model dispensers - Thirty-six (36) months parts and	Water filter systems - Twelve (12) months parts and labor (not including filter
labor	cartridges)

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 Companyauthorized 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 days from date of service to be eligible for credit. All claims outside this 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. The 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 person is authorized to give any other 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 45th Avenue, Denver, Colorado 80239 [phone]

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.

Suction Line /

Compressor

Heat

Exchange

Evaporator

Assembly

	Air Cooled	Liquid Line
	Condenser

Capillary Tube	Auger Drive
	System

Refrigeration System Schematic

Page 2

GEMU090

Service

Evaporator and Auger

Bearing

Ice Outlet

	Foam
Auger	Insulation
	Heat
	Exchange
	Tube Coil
Rotating Half
of Water Seal
	Water Inlet
Stationary
Half of Water
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	Glows Yellow when
unit is switched On	it's time to clean the
	machine

On/Off Control Button	Glows Red when there is no water	Clean Button
	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

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.

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 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.

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

Water Level

Water Sensor

Float Valve

and Reservoir

Hose to

Evaporator

Inlet

Evaporator

Inlet

Hose to drain

Page 5

GEMU090

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.

	Ice	Check	Time to	Clean
				Reset
	Making	Water	Clean

Page 6