Manitowoc Q270 series User manual

Technician’s
Handbook
This manual is updated as new information and models are
released. Visit our website for the latest manual.
www.manitowocice.com
America’s #1 Selling Ice Machine
Manitowoc
Q210/Q270
Undercounter
Ice Machines
Part Number STH039 8/13

Safety Notices
As you work on Manitowoc equipment, be sure to pay
close attention to the safety notices in this handbook.
Disregarding the notices may lead to serious injury
and/or damage to the equipment.
Throughout this handbook, you will see the following
types of safety notices:
!Warning
Text in a Warning box alerts you to a potential
personal injury situation. Be sure to read the
Warning statement before proceeding, and work
carefully.
!Caution
Text in a Caution box alerts you to a situation in
which you could damage the equipment. Be sure
to read the Caution statement before proceeding,
and work carefully.

Procedural Notices
As you work on Manitowoc equipment, be sure to read
the procedural notices in this handbook. These notices
supply helpful information which may assist you as
you work.
Throughout this handbook, you will see the following
types of procedural notices:
NOTE: Text set off as a Note provides you with simple,
but useful, extra information about the procedure you
are performing.
Important
Text in an Important box provides you with
information that may help you perform a
procedure more efficiently. Disregarding this
information will not cause damage or injury, but it
may slow you down as you work.

Read These Before Proceeding:
!Caution
Proper installation, care and maintenance are
essential for maximum performance and trouble-
free operation of your equipment. Visit our
website www.manitowocfsg.com for manual
updates, translations, or contact information for
service agents in your area.
Important
Routine adjustments and maintenance
procedures outlined in this handbook are not
covered by the warranty.
!Warning
Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions in this
manual can cause property damage, injury or
death.
!Warning
Do not use electrical appliances or accessories
other than those supplied by Manitowoc for your ice
machine model.
!Warning
Two or more people or a lifting device are
required to lift this appliance.

!Warning
This equipment contains high voltage electricity
and refrigerant charge. Installation and repairs are
to be performed by properly trained technicians
aware of the dangers of dealing with high voltage
electricity and refrigerant under pressure.The
technician must also be certified in proper
refrigerant handling and servicing procedures. All
lockout and tag out procedures must be followed
when working on this equipment.
!Warning
Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
!Warning
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given
supervision concerning use of the appliance by a
person responsible for their safety. Do not allow
children to play with this appliance.
!Warning
All covers and access panels must be in place
and properly secured, before operating this
equipment.

!Warning
Do not obstruct machine vents or openings.
!Warning
Do not store gasoline or other flammable vapors
or liquids in the vicinity of this or any other
appliance.
!Warning
Do not clean with water jet.
!Warning
It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection
during maintenance procedures.
!Warning
Two or more people are required to move this
equipment to prevent tipping.

!Warning
When using electric appliances, basic
precautions must always be followed, including
the following:
a. Read all the instructions before using
the appliance.
b. To reduce the risk of injury, close
supervision is necessary when an
appliance is used near children.
c. Do not contact moving parts.
d. Only use attachments recommended or
sold by the manufacturer.
e. Do not use outdoors.
f. For a cord-connected appliance, the
following must be included:
• Do not unplug by pulling on cord. To
unplug, grasp the plug, not the cord.
• Unplug from outlet when not in use
and before servicing or cleaning.
• Do not operate any appliance with a
damaged cord or plug, or after the
appliance malfunctions or is dropped
or damaged in any manner. Contact
the nearest authorized service facility
for examination, repair, or electrical
or mechanical adjustment.
g. Follow applicable lock out tag out
procedures before working on
equipment.
h. Connect to a properly grounded outlet
only.

!Warning
These 50 hz models contain up to 150 grams of
R290 (propane) refrigerant. R290 (propane) is
flammable in concentrations of air between
approximately 2.1% and 9.5% by volume (LEL lower
explosion limit and UEL upper explosion limit). An
ignition source at a temperature higher than 470°C
is needed for a combustion to occur. Refer to
nameplate to identify the type of refrigerant in your
equipment. Only trained and qualified personnel
aware of the dangers are allowed to work on the
equipment.
We reserve the right to make product
improvements at any time. Specifications and
design are subject to change without notice.

Part Number STH039 8/13 1
GENERAL INFORMATION
Model Numbers . . . . . . . . . . . . . . . . . . . . .5
How to Read a Model Number . . . . . . . . .6
Model/Serial Number Location . . . . . . . .7
Ice Machine Warranty Information . . . . .8
Owner Warranty Registration Card . . .8
Commercial Warranty Coverage . . . . .8
Residential Warranty Coverage . . . . .10
INSTALLATION
Location of Ice Machine . . . . . . . . . . . . . .13
Ice Machine Clearance Requirements . .14
Ice Machine Heat of Rejection . . . . . . . . .14
Leveling the Ice Machine . . . . . . . . . . . . .15
Electrical Requirements . . . . . . . . . . . . . .16
COMPONENT IDENTIFICATION
MAINTENANCE
Ice Machine Inspection . . . . . . . . . . . . . .21
Exterior Cleaning . . . . . . . . . . . . . . . . . . .21
Cleaning the Condenser . . . . . . . . . . . . .22
Air-cooled Condenser . . . . . . . . . . . . .22
Interior Cleaning and Sanitizing . . . . .24
Removal from Service/Winterization . . .37
OPERATION
Initial Start-up or Start-up After Automatic
Shut-off . . . . . . . . . . . . . . . . . . . . . . . .39
Freeze Sequence . . . . . . . . . . . . . . . .39
Harvest Sequence . . . . . . . . . . . . . . . .40
Automatic Shut-off . . . . . . . . . . . . . . . .40
Energized Parts Chart . . . . . . . . . . . . .41
Operational Checks . . . . . . . . . . . . . . . . .43

2 Part Number STH039 8/13
TROUBLESHOOTING
Ice Machine Will Not Run . . . . . . . . . . 47
Diagnosing Ice Thickness Control Circuitry
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Ice Production Check . . . . . . . . . . . . . 51
Installation and Visual Inspection Checklist
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Water System Checklist . . . . . . . . . . . 53
Ice Formation Pattern . . . . . . . . . . . . . 54
Safety Limit Feature . . . . . . . . . . . . . . 56
Analyzing Discharge Line Temperature 62
Analyzing Suction temperature . . . . . . 64
Hot Gas Valve . . . . . . . . . . . . . . . . . . 69
Comparing Evaporator Inlet/Outlet
Temperatures . . . . . . . . . . . . . . . . . . . 73
Discharge Line Temperature Analysis 74
Refrigeration Component Diagnostic Chart
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Final Analysis . . . . . . . . . . . . . . . . . . . 78
Refrigeration Component Diagnostic Chart
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Part Number STH039 8/13 3
COMPONENT CHECK PROCEDURES
Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . .83
Bin Switch . . . . . . . . . . . . . . . . . . . . . . . . .84
Diagnosing Start Components . . . . . . . .87
Capacitor . . . . . . . . . . . . . . . . . . . . . . .87
Relay . . . . . . . . . . . . . . . . . . . . . . . . . .87
ON/OFF/WASH Toggle Switch . . . . . . . . .88
Ice Thickness Probe . . . . . . . . . . . . . . . . .89
Ice Thickness Check . . . . . . . . . . . . . .90
Compressor Electrical Diagnostics . . . .91
Fan Cycle Control . . . . . . . . . . . . . . . . . . .93
High Pressure Cutout (HPCO) Control . .94
Liquid Line Filter-Driers . . . . . . . . . . . . . .95
Refrigerant Recovery/Evacuation . . . . . .96
Recovery and Recharging Procedures 96
Q270 Condenser Fan Motor Replacement 97
COMPONENT SPECIFICATIONS
Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . .99
Bin Switch . . . . . . . . . . . . . . . . . . . . . . . . .99
ON/OFF/WASH Toggle Switch . . . . . . . . .99
Fan Control Cycle . . . . . . . . . . . . . . . . . . .99
High Pressure Cutout (HPCO) Control . .100
Total System Refrigerant Charge . . . . . .100

4 Part Number STH039 8/13
CHARTS
Cycle Times, 24 Hr. Ice Production and
Refrigerant Temperature Charts . . . . . . 101
Q210 Self-contained Air-cooled . . . . . 102
Q270 Self-contained Air-cooled . . . . . 103
DIAGRAMS
Wiring Diagrams . . . . . . . . . . . . . . . . . . . 105
Q210 . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Q270 . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Electronic Control Boards . . . . . . . . . . . 108
Tubing Schematic . . . . . . . . . . . . . . . . . . 109

Part Number STH039 8/13 5
General Information
Model Numbers
This manual covers the following models:
Self-contained
Air-cooled
QYP0214A
QYP0274A
!Warning
An ice machine contains high voltage electricity
and refrigerant charge. Repairs are to be
performed by properly trained refrigeration
technicians aware of the dangers of dealing with
high voltage electricity and refrigerant under
pressure.The technician must also be certified in
proper refrigerant handling and servicing
procedures. All lockout and tag out procedures
must be followed when working on this
equipment.
!Warning
These 50 hz models may contain up to 150 grams of
R290 (propane) refrigerant. R290 (propane) is
flammable in concentrations of air between
approximately 2.1% and 9.5% by volume (LEL lower
explosion limit and UEL upper explosion limit). An
ignition source at a temperature higher than 470°C
is needed for a combustion to occur. Refer to
nameplate to identify the type of refrigerant in your
equipment. Only trained and qualified personnel
aware of the dangers are allowed to work on the
equipment.

6 Part Number STH039 8/13
How to Read a Model Number
!Caution
Use only Manitowoc approved Ice Machine
Cleaner (part number 94-0546-3 original green
ice machine cleaner or 000000084 clear metal
safe ice machine cleaner) and Sanitizer (part
number 94-0565-3). It is a violation of Federal
law to use these solutions in a manner
inconsistent with their labeling. Read and
understand all labels printed on bottles before
use.
A - Air-cooled
4 - Half-dice, Air-cooled
Series Condenser
Type
Capacity
Q Y P 0214 A
Y - Half-dice
Cube Size
P - Propane

Part Number STH039 8/13 7
Model/Serial Number Location
The model and serial numbers are required when
requesting information from your local Manitowoc
distributor, service representative, or Manitowoc Ice.
The model and serial number are listed on the
OWNER WARRANTY REGISTRATION CARD. They
are also listed on the MODEL/SERIAL NUMBER
DECAL affixed to the ice machine.
Model/Serial Number Location
MODEL/SERIAL
NUMBER PLATE MODEL/SERIAL
NUMBER PLATE
SV1687G

8 Part Number STH039 8/13
Ice Machine Warranty Information
OWNER WARRANTY REGISTRATION CARD
General
Warranty coverage begins the day the ice machine is
installed.
If the OWNER WARRANTY REGISTRATION CARD is
not returned, Manitowoc will use the date of sale to the
Manitowoc Distributor as the first day of warranty
coverage for your new ice machine.
COMMERCIAL WARRANTY COVERAGE
General
The following Warranty outline is provided for your
convenience. For a detailed explanation, read the
warranty bond shipped with each product.
Contact your local Manitowoc representative or
Manitowoc Ice, if you need further warranty
information.
Parts
1. Manitowoc warrants the ice machine against
defects in materials and workmanship, under
normal use and service for three (3) years from
the date of original installation.
2. The evaporator and compressor are covered by
an additional two (2) year (five years total)
warranty beginning on the date of the original
installation.
Labor
1. Labor required to repair or replace defective
components is covered for three (3) years from
the date of original installation.
2. The evaporator is covered by an additional two-
(2) year (five years total) labor warranty beginning
on the date of the original installation.

Part Number STH039 8/13 9
Exclusions
The following items are not included in the ice
machine’s warranty coverage:
1. Normal maintenance, adjustments and cleaning
as outlined in this manual.
2. Repairs due to unauthorized modifications to the
ice machine or use of non-standard parts without
prior written approval from Manitowoc Ice.
3. Damage caused by improper installation of the ice
machine, electrical supply, water supply or
drainage, or damage caused by floods, storms, or
other acts of God.
4. Premium labor rates due to holidays, overtime,
etc.; travel time; flat rate service call charges;
mileage and miscellaneous tools and material
charges not listed on the payment schedule.
Additional labor charges resulting from the
inaccessibility of equipment are also excluded.
5. Parts or assemblies subjected to misuse, abuse,
neglect or accidents.
6. Damage or problems caused by installation,
cleaning and/or maintenance procedures
inconsistent with the technical instructions
provided in this manual.
7. This warranty is intended exclusively for
commercial application. No warranty is extended
for personal, family, or household purposes.
Authorized Warranty Service
To comply with the provisions of the warranty, a
refrigeration service company qualified and authorized
by your Manitowoc distributor, or a Contracted Service
Representative must perform the warranty repair.
Service Calls
Normal maintenance, adjustments and cleaning as
outlined in this manual are not covered by the
warranty.

10 Part Number STH039 8/13
RESIDENTIAL WARRANTY COVERAGE
What Does this Limited Warranty Cover?
Subject to the exclusions and limitations below,
Manitowoc Ice (“Manitowoc”) warrants to the original
consumer that any new ice machine manufactured by
Manitowoc (the “Product”) shall be free of defects in
material or workmanship for the warranty period
outlined below under normal use and maintenance,
and upon proper installation and start-up in
accordance with the instruction manual supplied with
the Product.
How Long Does this Limited Warranty Last?
Who is Covered by this Limited Warranty?
This limited warranty only applies to the original
consumer of the Product and is not transferable.
What are MANITOWOC ICE’S Obligations Under
this Limited Warranty?
If a defect arises and Manitowoc receives a valid
warranty claim prior to the expiration of the warranty
period, Manitowoc shall, at its option: (1) repair the
Product at Manitowoc’s cost, including standard
straight time labor charges, (2) replace the Product
with one that is new or at least as functionally
equivalent as the original, or (3) refund the purchase
price for the Product. Replacement parts are
warranted for 90 days or the balance of the original
warranty period, whichever is longer. The foregoing
constitutes Manitowoc’s sole obligation and the
consumer’s exclusive remedy for any breach of this
limited warranty. Manitowoc’s liability under this limited
warranty is limited to the purchase price of Product.
Additional expenses including, without limitation,
service travel time, overtime or premium labor
charges, accessing or removing the Product, or
shipping are the responsibility of the consumer.
Product Covered Warranty Period
Ice Machine Twelve (12) months
from the sale date

Part Number STH039 8/13 11
What Is Not Covered?
This limited warranty does cover, and you are solely
responsible for the costs of: (1) periodic or routine
maintenance, (2) repair or replacement of the Product
or parts due to normal wear and tear, (3) defects or
damage to the Product or parts resulting from misuse,
abuse, neglect, or accidents, (4) defects or damage to
the Product or parts resulting from improper or
unauthorized alterations, modifications, or changes;
and (5) defects or damage to any Product that has not
been installed and/or maintained in accordance with
the instruction manual or technical instructions
provided by Manitowoc. To the extent that warranty
exclusions are not permitted under some state laws,
these exclusions may not apply to you.
EXCEPT AS STATED IN THE FOLLOWING SENTENCE,
THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE
WARRANTY OF MANITOWOC WITH REGARD TO THE
PRODUCT. ALL IMPLIED WARRANTIES ARE STRICTLY
LIMITED TO THE DURATION OF THE LIMITED
WARRANTY APPLICABLE TO THE PRODUCTS AS
STATED ABOVE, INCLUDING BUT NOT LIMITED TO, ANY
WARRANTY OF MERCHANTABILITY OR OF FITNESS
FOR A PARTICULAR PURPOSE. Some states do not
allow limitations on how long an implied warranty lasts,
so the above limitation may not apply to you.
IN NO EVENT SHALL MANITOWOC OR ANY OF ITS
AFFILIATES BE LIABLE TO THE CONSUMER OR ANY
OTHER PERSON FOR ANY INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY KIND
(INCLUDING, WITHOUT LIMITATION, LOSS OF PROFITS,
REVENUE OR BUSINESS) ARISING FROM OR IN ANY
MANNER CONNECTED WITH THE PRODUCT, ANY
BREACH OF THIS LIMITED WARRANTY, OR ANY OTHER
CAUSE WHATSOEVER, WHETHER BASED ON
CONTRACT, TORT OR ANY OTHER THEORY OF
LIABILITY. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so
the above limitation or exclusion may not apply to you.

12 Part Number STH039 8/13
How State Law Applies
This limited warranty gives you specific legal rights,
and you may also have rights that vary from state to
state or from one jurisdiction to another.
Registration Card
To secure prompt and continuing warranty service, this
warranty registration card must be completed and sent
to Manitowoc within thirty (30) days from the sale date.
Complete the following registration card and send it to
Manitowoc at the address shown above. Retain a copy
for your records.