Foster HR80MF User manual

1
By Appointment to
Her Majesty Queen Elizabeth II
Suppliers of Commercial Refrigeration
Foster Refrigerator, King’s Lynn
A Division of ITW Ltd
Foster Refrigerator,
Oldmedow Road,
King’s Lynn,
Norfolk, PE30 4JU
United Kingdom
Original Service Manual
Milk Fridge
HR80MF Models
Bit25 Controller & LCD5S Display
November 2014 Version 1
English
ISO 9001 ISO 14001

1
Contents Page
Manual Information & Health & Safety Notes 1
Environmental Management Policy 2
Disposal Requirements & Electrical Safety 2
Displays Icons & Switches 3
BIT25 User Functions - Start Up, Set Point, Standby, Key Security & Defrost Function 3-4
BIT25 Controller Connection Drawing & Conguration of Parameters 4-5
BIT25 Controller Default Parameters 6-9
Model Temperature Specic Parameters 10.11
Cleaning Instructions 11
Wiring Diagrams 12
Troubleshooting 13-15
Service Manual Information:
The products and all information in this manual are subject to change without prior notice.
We assume by the information given that the person(s) working on these refrigeration units are
fully trained and skilled in all aspects of their workings. Also that they will use the appropriate safety equipment
and take or meet precautions where required.
The service manual does not cover information on every variation of this unit; neither does it cover the
installation or every possible operating or maintenance instruction for the units.
Health & Safety Warnings & Information
Make sure the power supply is turned off before making any electrical repairs.
To minimise shock and re hazards, please do not plug or unplug the unit with wet hands.
During maintenance and cleaning, please unplug the unit where required.
Care must be taken when handling or working on the unit as sharp edges may cause
personal injury, we recommend the wearing of suitable PPE.
Ensure the correct moving and lifting procedures are used when relocating a unit.
Do NOT use abrasive cleaning products, only those that are recommended. Never scour
any parts of the refrigerator. Scouring pads or chemicals may cause damage by scratching
or dulling polished surface nishes.
Failure to keep the condenser clean may cause premature failure of the motor/compressor
which will NOT be covered under warranty policy.
Do NOT touch the cold surfaces in the freezer compartment. Particularly when hands are
damp or wet, skin may adhere to these extremely cold surfaces and cause frostbite.
Please ensure the appropriate use of safety aids or Personnel Protective Equipment (PPE)
are used for you own safety.

2
Environmental Management Policy
Product Support and Installation Contractors.
Foster Refrigerator recognises that its activities, products and services can have an adverse impact upon the
environment.
The organisation is committed to implementing systems and controls to manage, reduce and eliminate its adverse
environmental impacts wherever possible, and has formulated an Environmental Policy outlining our core aims. A copy
of the Environmental Policy is available to all contractors and suppliers upon request.
The organisation is committed to working with suppliers and contractors where their activities have the potential to
impact upon the environment. To achieve the aims stated in the Environmental Policy we require that all suppliers and
contractors operate in compliance with the law and are committed to best practice in environmental management.
Product Support and Installation contractors are required to:
1. Ensure that wherever possible waste is removed from the client’s site, where arrangements are in place all waste
should be returned to Foster Refrigerator’s premises. In certain circumstances waste may be disposed of on the
client’s site; if permission is given, if the client has arrangements in place for the type of waste.
2. If arranging for the disposal of your waste, handle, store and dispose of it in such a way as to prevent its escape
into the environment, harm to human health, and to ensure the compliance with the environmental law. Guidance is
available from the Environment Agency on how to comply with the waste management ‘duty of care’.
3. The following waste must be stored of separately from other wastes, as they are hazardous to the environment:
refrigerants, polyurethane foam, and oils.
4. When arranging for disposal of waste, ensure a waste transfer note or consignment note is completed as
appropriate. Ensure that all waste is correctly described on the waste note and include the appropriate six-digit
code from the European Waste Catalogue. Your waste contractor or Foster can provide further information if
necessary.
5. Ensure that all waste is removed by a registered waste carrier, a carrier in possession of a waste management
licence, or a carrier holding an appropriate exemption. Ensure the person receiving the waste at its ultimate
destination is in receipt of a waste management licence or valid exemption.
6. Handle and store refrigerants in such a way as to prevent their emission to atmosphere, and ensure they are
disposed of safely and in accordance with environmental law.
7. Make arrangements to ensure all staff who handle refrigerants do so at a level of competence consistent with the
City Guilds 2079 Handling Refrigerants qualication or equivalent qualication.
8. Ensure all liquid substances are securely stored to prevent leaks and spill, and are not disposed of into storm
drains, foul drain, or surface water to soil.
Disposal Requirements
If not disposed of properly all refrigerators have components that can be harmful to the
environment.
All old refrigerators must be disposed of by appropriately registered and licensed waste contractors, and in
accordance with national laws and regulations.
General Electrical Safety
Foster Refrigerator recommends that the equipment is electrically connected via a Residual Current Device; such as
a Residual Current Circuit Breaker (RCCB) type socket, or through a Residual Current Circuit Breaker with Overload
Protection (RCBO) supplied circuit.

3
Controller Operation - BIT25
The controller consists of two pieces, the controller (BIT25) and separate display (LCD5S).
The display is positioned inside the cabinet and the controller at the rear.
LCD5S Display Icons and Switches
Display Indicators & Buttons Alarms/ Warnings During Normal Operation
Info/ Set Point Button Controller in Standby
Manual Defrost/ Decrease Button Room High Temperature Alarm
Manual Activation/ Increase Button Room Low Temperature Alarm
Exit/ Standby Button Probe T1 Failure (Air)
Thermostat/ Compressor Output Generic Alarm
Fan Output Defrost In Progress
Alarm Warning Keypad Locked
Defrost Output
Information Menu Symbols and Reasons
Instant probe 1 temperature Minimum probe 1 temperature recorded
Maximum probe 1 temperature recorded Compressor working weeks **
** Displayed only if ACC > 0
Start Up and Operation
User Functions
Start Sequence
When the unit is rst connected to the mains the display will automatically light up and show either or the
current ambient temperature.
To start or activate when in standby:
>Press and hold the button for 5 seconds then release.
Access to the menu and information displayed
>Press and immediately release button
>With button or select the data to be displayed
>Press and hold button to display the value
>To exit from the menu, press button or wait for 10 seconds.

4
Set point: Display and modication
>Press button and hold to display the set point.
>By keeping button pressed, use button or to set the desired value (adjustment is within the minimum
SPL and the maximum SPH limit)
>When button is released, the new value is stored.
Standby
When pressing the button for 3 seconds, will allow the controller to be put on a standby or output control to be
resumed (with SB = YES only). When on Standby will be displayed.
Keypad Unlock
Press & release then use to select ‘LOC’. Press and hold to change from ‘YES’ to ‘NO’. Leave for 10
seconds or briey press to resume.
Defrost
Automatic Defrost
The cabinet will defrost automatically on a predened schedule. This setting will also automatically terminate on a
predened schedule.
Manual Defrost. (Freezer Sections only)
To initiate a manual defrost press and hold the defrost button for 2 seconds
Controller Connection Drawing and Dimensions
(Dimensions in mm)

5
Controller Technical Data
Power Supply Operating Conditions
BIT25 ... E 230Vac±10%, 50/60Hz, 3W -10…+50°C; 15%...80%r.H
Relay Output CE (Reference norms)
Compressor 20(8)A 240Vac
Auxiliary Loads 1 16(4)A 240Vac EN55022 (Class B)
Auxiliary Loads 2 7(2)A 240Vac EN50082-1
Input
NTC 10KΩ@25°C
Measurement Range Measurement Accuracy
-50 / -9.9…19.9 /110°C <0.5°C within the measurement range
Conguration Parameters
>To access to the parameter conguration menu, press + for 5 seconds
>With button or select the parameter to be modied.
>Press button and hold briey to display the value. On releasing the button the controller will then show the
next parameter.
>By keeping button pressed, use button or to set the desired value. On releasing the button the
controller will store the amended value and then show the next parameter.
>To exit from the setup, press button or wait for 30 seconds.
*Dark grey highlight denotes a parameter that may not be visible unless another is set to a specic value.
For example:
OS3 will not show unless DI2 = T3

6
BIT25 Controller Default Parameter Values
Parameter Range Description Default
Setting
SPL -50 … SPH Minimum limit for 'SP' setting. 1
SPH SPL … 110° Maximum limit for 'SP' setting. 3
SP SPL … SPH Temperature setpoint to be achieved. 2
C-H REF or HEA Refrigeration or Heating control mode. REF
HYS 1 … 10° Off / On thermostat differential. 3
CRT 0 … 30 min Compressor rest time. 2
CT1 0 … 30 min Thermostat run time with faulty T1 probe.
(‘CT1’ = 0 output with faulty T1 will always be off). 6
CT2 0 … 30 min Thermostat off time with faulty T1 probe.
(‘CT2’ = ‘0’ & ‘CT1’ =>’0’ output with faulty T1 will always be on). 4
CSD 0 … 30 min Compressor stop delay after door has been opened.
(Only if ‘DS’ = ‘YES’). 1
DFM
Defrost start mode:
TIM
NON Defrost function is disabled (the following parameter will be 'FCM').
TIM Regular time defrost.
FRO Defrost time elapses only in condition of frost accumulation.
DFM = 'TIM' or 'FRO'
DFT 0 … 99 hours Time interval between defrosts. 6
DFB
Defrost timer clock.
YESYES Following mains interruption, timer resumes count.
NO Following mains interruption, timer restarts from zero.
DLI -50 … 110° Defrost end temperature (Only if ‘T2’ = ‘YES’). 15
DTO 1 … 120 min Maximum defrost duration. 20
DTY
Defrost type:
OFF
OFF Timed off cycle defrost (compressor and heater off).
ELE Electric heater defrost (compressor off, heater on).
GAS Hot gas defrost (compressor and heater on).
DPD 0 … 240 sec Evaporator pump down. Timed pause at start of defrost. 0
DPR 0 ... 20 sec Defrosting Pressure Reduction. Period between hot gas valve shutting
and compressor stopping (only active when 'DTY' = 'GAS'). 3
DRN 0 … 30 min Drain down period. 2
DDM
Defrost display mode:
DEF
RT Real (actual) air temperature.
LT Last temperature display before start of defrost.
SP The current setpoint value.
DEF "DEF"
DDY 0 … 60 min Defrost display delay period.
Time ‘DDM’ is shown following defrost termination. 10
FID
Fans in defrost:
YESYES Fans run during defrost.
NO Fans do not run during defrost.
FDD -50 … 110° Evaporator fan restart temperature following defrost.
(Only if ‘T2’ = ‘YES’). 5
FTO 0 … 120 min Maximum evaporator fan stop period following defrost (only when 'T2' =
'YES'). 3

7
Parameter Range Description Default
Setting
FCM
Evaporator fan mode during thermostatic control:
NON
NON Fan(s) run continuously (subject to door & defrost).
TMP
Temperature based control. When compressor is on, fans are
on. When compressor is off, fans run as long as temperature
difference Te-Ta > ‘FDT’. Fans on again with ‘FDH’.
TIM
Time based control. When compressor is on, fans are on.
When compressor is off, fans in accordance to parameters
FT1’, ‘FT2’ and ‘FT3’.
FDT -12.0 ... 0° Te-Ta difference for fans to turn off after compressor stopped.
(Only if ‘T2’ = ‘YES’ and ‘FCM’ = ‘TMP’). -1
FDH 1 ... 12.0 ° Temperature differential for evaporator fan restart.
(Only if ‘T2’ = ‘YES’ and ‘FCM’ = ‘TMP’). 3
FDS 0 ... 120 sec Minimum evaporator fan stop period (following door opening etc.). 20
FT1 0 ... 180 sec Fan stop delay after compressor stop. 15
FT2 0 ... 30 min Timed fan stop following ‘FT1’.
(With FT2 = ‘0’ the fans remain on all the time). 0
FT3 0 ... 30 min Timed fan run following ‘FT2’.
(With ‘FT3’ = ‘0’ & ‘FT2’ > ‘0’ the fans remain off all the time). 2
ATM
Alarm threshold conguration:
REL
NON All temperature alarms are inhibited (the following parameter will be
'ADO').
ABS The value set in 'ALA' & 'AHA' represent actual alarm setpoints.
REL The values set in 'ALR' & 'AHR' are alarm differentials which
relate to ‘SP’ and ‘SP’ + ‘HYS’ (the following parameter will be ‘ALR’).
ATM = 'ABS'
ALA -50 … 120° Low temperature alarm threshold. -3
AHA -50 … 120° High temperature alarm threshold (the following parameter will be 'ATI'). 8
ATM = 'REL'
ALR -12 … 0° Low temperature alarm differential.
With ‘ALR’ = ‘0’ the low temperature alarm is excluded). -5
AHR 0 … 12° High temperature alarm differential.
(With ‘AHR’ = ‘0’ the low temperature alarm is excluded). 5
ATM = 'ABS' or 'REL'
AT1
Alarm probe:
T1
T1 Air temperature probe used for alarm detection.
T2 Evaporator temperature probe used for alarm detection (if 'T2' = 'YES').
T3 Third temperature probe used for alarm detection (if 'DI2' = 'T3').
ATD 0 … 120 min Delay before alarm temperature warning. 90
ADO 0 … 30 min Delay before door open alarm warning (only when 'DI2' = 'DOR'). 8
AHM
Operation in case of high condenser alarm (if 'DI2' = 'T3' and 'T3' =
'CND' ):
NON
NON High condenser temperature alarm inhibited.
ALR Condenser warning - 'HC' displayed, alarm sounds.
STP As 'ALR', with compressor stopped and defrosts suspended.

8
Parameter Range Description Default
Setting
AHT -50 … 110° Condenser alarm temperature (if 'DI2' = 'T3'). 65
ACC ‘0 … 52 weeks Condenser cleaning period.
(With ‘ACC’ = ‘0’ condenser cleaning alarm is disabled). 0
IISM
Switch over method to second parameter set:
NON
NON Second parameter set is excluded (the following parameter will be 'SB').
MAN Second parameter set is activated / deactivated by button 'M'.
DI2 Second parameter set activated by 'DI2' input ('DI2' = 'IISM').
ATM = 'ABS' or 'REL'
IISL -50 … IISH Minimum limit for 'IISP' setting. 1
IISH IISL … 110° Maximum limit for 'IISP' setting. 1
IISP IISP … IISH Temperature setpoint to be achieved in 'Mode 2'. 1
IIHY 1 … 10° Off / On thermostat differential in 'Mode 2'. 3
IIFC
Evaporator fan mode during 'Mode 2' thermostatic control:
NON
NON Fan(s) run continuously.
TMP
Temperature based control. When compressor is on, fans are on. When
compressor is off, fans run as long as temperature difference Te-Ta >
'FDT'. Fans on again with 'FDH'.
TIM
Time based control. When compressor is on, fans are on.
When compressor is off, fans in accordance to parameters
T1’, ‘FT2’ and ‘FT3’.
IIDF 0 … 99 hours Time interval between defrosts in ‘Mode 2’. 6
SB
Standby button operation:
YESYES Standby button enabled.
NO Standby button disabled.
DI1
Congurable digital input operation:
NON
NON Digital input not activated.
DOR Door switch input.
ALO Alarm ('ALr' displayed) when contact opens.
ALC Alarm ('ALr' displayed) when contact closes.
D12
Congurable digital input operation:
NON
NON Digital input not activated.
DOR Door switch input.
ALO Alarm ('ALr' displayed) when contact opens.
ALC Alarm ('ALr' displayed) when contact closes.
PSP Allows control via potentiometer.
IISM Operates 2nd parameter set when contact closes.
T3 Allows for 3rd temperature probe function.
DI2 = 'T3'
T3
T3 probe function (only when 'DI2' = 'T3'):
DSPDSP T3 probe temperature displayed.
CND Condenser temperature measurement.
OS3 -12.5 … 12.5°C T3 probe temperature offset (only when 'DI2' = 'T3'): 0
DI2 = 'PSP'
PSL -50 … 70°C Minimum setpoint adjusted by potentiometer (only when 'DI2' = 'PSP'): 10
PSR 0.0 … 15.0°C Range of setpoint (hysteresis) for potentiometer (only when 'DI2' =
'PSP'):. 10

9
Parameter Range Description Default
Setting
DI2 = 'PSP'
POF
Potentiometer standby enabling operation (only when 'DI2' =
'PSP'):
YES
YES Potentiometer standby enabled (when turned to minimum, controller set
to standby).
NO Potentiometer standby disabled.
LSM
Light control mode (if 'OA1' = 'LGT'):
MAN
NON Light Control Mode disabled (always off).
MAN Light output operation is activated / deactivated by button 'M'.
D1O Light output is switched on when door is opened (if 'DI1' = 'DOR').
D2O Light output is switched on when door is opened (if 'DI2' = 'DOR').
D2C Light output is switched off when door is opened (if 'DI2' = 'DOR').
OA1
Auxiliary Relay 1 Operation:
NON
NON Output disabled (always off).
FAN Control of evaporator fan.
DEF Control of defrost heater / device (activated when 'DTY' = 'ELE' or
'GAS').
LGT Output enabled for light control.
0-1 Contacts open/close with 'Standby'/'On' mode ('SB' = 'YES').
ALO Contacts open when an alarm condition occurs.
ALC Contacts close when an alarm condition occurs.
(Relay contacts open when in stand by mode).
OA2
Auxiliary Relay 2 Operation:
FAN
NON Output disabled (always off).
FAN Control of evaporator fan.
DEF Control of defrost heater / device (activated when 'DTY' = 'ELE' or
'GAS').
LGT Output enabled for light control.
0-1 Contacts open/close with 'Standby'/'On' mode ('SB' = 'YES').
ALO Contacts open when an alarm condition occurs.
ALC Contacts close when an alarm condition occurs.
(Relay contacts open when in stand by mode).
OS1 -12.5 … 12.5°C Air temperature probe (T1) offset. 0
T2
T2 probe enabling:
NOYES T2 probe enabled.
NO T2 probe disabled.
OS2 -12.5 … 12.5°C Evaporator temperature probe (T2) offset. 0
TLD 1 … 30 min Delay for min. ('TLO') and max. ('THI') temperature logging. 10
SCL
Readout scale:
2°C
1°C Range -50 …. 110°C (0.1°C resolution within -9.9 to +19.9°C)
2°C Range -50 …. 110°C
°F Range -58 …. 180°F
SIM 0 … 100 Display slowdown. 5
ADR 1…255 BIT25 address for PC communication 1

10
HR80MF Specic Parameter Values
Parameter Parameter Description Controller
Default HR80MF
SPL Minimum limit for 'SP' setting. 1 2
SPH Maximum limit for 'SP' setting. 3 5
SP Temperature setpoint to be achieved. 2 2
C-H Refrigeration/ heating control mode. REF REF
HYS Off / On thermostat differential. 3 3
CRT Compressor rest time. 2 2
CT1 Thermostat run time with faulty T1 probe. 6 6
CT2 Thermostat off time with faulty T1 probe. 4 4
CSD Compressor stop delay after door has been opened. 1 1
DFM Defrost start mode. TIM TIM
DFT Time interval between defrosts. 6 6
DFB Defrost timer clock. YES YES
DLI Defrost end temperature 15 15
DTO Maximum defrost duration. 20 10
DTY Defrost type. OFF OFF
DPD Evaporator pump down. Timed pause at start of defrost. 0 0
DPR Defrosting Pressure Reduction (used when 'DTY' = 'GAS' to over-run com-
pressor). 3 3
DRN Drain down period. 2 3
DDM Defrost display mode. DEF DEF
DDY Defrost display delay period. 10 10
FID Fans in defrost. YES YES
FDD Evaporator fan restart temperature following defrost. 5 5
FTO Maximum evaporator fan stop period following defrost (only when 'T2' =
'YES'). 3 3
FCM Evaporator fan mode during thermostatic control. NON NON
FDT Te-Ta difference for fans to turn off after compressor stopped. -1 -1
FDH Temperature differential for evaporator fan restart. 3 3
FDS Minimum evaporator fan stop period (following door opening etc.) 20 20
FT1 Fan stop delay after compressor stop. 15 15
FT2 Timed fan stop following 'FT1'. 0 0
FT3 Timed fan run following 'FT2'. 2 2
ATM Alarm threshold conguration. REL REL
ALR Low temperature alarm differential. -5 -5
AHR High temperature alarm differential. 5 5
ATI Alarm probe. T1 T1
ATD Delay before alarm temperature warning. 90 90
ADO Delay before door open alarm warning (only when 'DI2' = 'DOR'). 8 8
AHM Operation in case of high condenser alarm (if 'DI2' = 'T3' and 'T3' = 'CND' ): NON NON
ACC Condenser cleaning period. 0 0
IISM Switch over method to second parameter set. NON NON
IISL Minimum limit for 'IISP' setting. 1 1

11
Parameter Description Controller
Default HR80MF
IISH Maximum limit for 'IISP' setting. 1 1
IISP Temperature setpoint to be achieved in 'Mode 2'. 1 1
IIHY Off / On thermostat differential in 'Mode 2'. 3 3
IIFC Evaporator fan mode during 'Mode 2' thermostatic control. NON NON
IIDF Time interval between defrosts in 'Mode 2'. 6 6
SB Standby button operation. YES YES
DI1 Congurable digital input 1 operation. NON NON
DI2 Congurable digital input 2 operation. NON NON
LSM Light control mode (if 'OA1' = 'LGT'). NON NON
OA1 Auxiliary Relay 1 Operation. NON NON
OA2 Auxiliary Relay 2 Operation. FAN FAN
OS1 Air temperature probe (T1) offset. 0 0
T2 T2 probe enabling. NO NO
OS2 Evaporator temperature probe (T2) offset. 0 0
TLD Delay for min. ('TLO') and max. ('THI') temperature logging. 10 10
SCL Readout scale. 2°C 2°C
SIM Display slowdown. 5 5
ADR BIT25 address for PC communication. 1 1
*Yellow highlight denotes a parameter different to that of the default setting
(Parameters sourced from BIT25B0Q3E-2FS Revision13 28.04.2014- Correct at time of print)
Cleaning and Maintenance
Important: Before cleaning, the unit should be put into standby and then the power supply should be
turned off at the mains. Please do not plug or unplug the unit with wet hands. Only when cleaning has been
completed and the unit is dry should the cabinet be turned back on at the mains.
Suitable P.P.E (Personnel Protective Equipment) should be worn at all times.
Regular Maintenance:
> As and when required remove all product from the unit. Clean exterior and interior surfaces with mild liquid
detergent, following the directions on the pack at all times. Rinse surfaces with a damp cloth containing clean
water. Never use wire wool, scouring pads/powders or high alkaline cleaning agents i.e bleaches, acids and
chlorines as these may cause damage.
>Condenser Cleaning:
This should take place on a regular basis or as and when required (4 to 6 weeks) by a competent/trained
personnel.
Use a soft brush or vacuum cleaner to remove dirt/dust. If there are any stubborn grease deposits left on or
through the condenser, call your supplier to carry out a full service (this is normally chargeable). Failure to
maintain the condenser may invalidate the warranty of the condensing unit and cause premature failure of the
motor/compressor.
Do not use a wire brush to clean the condenser. Vacuum or brush the air lter (where tted).
> All gaskets should be inspected on a regular basis and replaced if damaged. To clean, wipe with a warm damp
soapy cloth followed by a clean damp cloth and thoroughly dry.
If gasket replacement is required, start by tting all the corners of a gaskets into place before working the rest of
the length of the gasket into the retainer. Failure to follow this procedure may result in the gasket stretching and
tment not being possible.

12
Wiring Diagrams

13
Troubleshooting
Problem Possible Cause Solution
Compressor will not start
No voltage in socket Use voltmeter to check
Electrical conductor or wires may be
cut Use ohmmeter to check for continuity
Defective electrical component;
thermostat, relay, thermal protector
etc.
Replace defective component
Compressor motor has a winding
open or shorted
Measure ohmic resistance of main
and auxiliary winding using
ohmmeter. Compare with correct
values
Compressor stuck Change compressor
Temperature control contacts are
open Repair or replace the contacts
Incorrect wiring Check wiring diagram and correct
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker
Power cord unplugged Plug in power cord
Controller set too high Set controller to lower temperature
Cabinet in defrost cycle Wait for defrost cycle to nish
The temperature is too cold
Controller is set at a very cold
position
Set to warmer position and check if
the compressor stops according to
controllers operating range
Controller does not disconnect the
condensing unit
Check the insulation of the
Thermostat. If problem persists,
change the thermostat
Control contacts are stuck closed Change the control. Check amperage
load
Defective or incorrect temperature
control
Determine correct control and
replace
The temperature is not cold enough
Controller is set at a very warm
position Adjust to colder setting
Condenser is dirty Clean condenser
The refrigerator has been placed at
an inadequate location
The unit must not be near stoves,
walls that are exposed to the sun, or
places that lack sufcient air ow
Compressor is inefcient or there is
a high pressure due to the air in the
system
If there is air in the system, purge
and recharge
Iced up evaporator coil
Check temperature control refrigerant
charge, and defrost mechanism.
Remove all ice manually and start
over.
Restriction in system Locate exact point of restriction and
correct
Too many door openings Advise user to decrease if possible
Excessive heat load placed in cabinet Advise user not to put in products
that are too hot.

14
The temperature is not cold enough
(Continued)
The refrigerator has been
overcharged with the refrigerant gas
Check to see if condensation or ice
crystals have formed on the suction
line. If so, charge with the correct
amount of gas
The refrigerant gas is leaking
Find the location of gas leak in order
to seal and replace the defective
component. Change the drier.
Perform a good vacuum and
recharge unit
The evaporator and/or condenser
fans are not working
Check electrical connections and
make sure that the fan blade isn’t
stuck. Replace the fan motor if it
doesn’t work.
Blocking air ow Only approved milk containers should
be stored in this unit.
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker
Electrical Shock Wires or electrical components are in
direct contact with metallic parts
Check for appropriate insulation on
the connections of each component
Noise
The refrigerator is not properly
levelled
Check if the noise goes away after
you level the refrigerator
The condenser is not fastened
correctly. Copper tubing is in contact
with metal
While the compressor is working,
check to see if metal parts are in
contact with one another and/or if the
screws that fasten the condenser are
tightened
The evaporator and/or condenser
fans are loose
Check if the fans are securely
fastened. Also, check if the fan
blades are loose, broken or cracked.
If so, change the faulty blade
Compressor has an internal noise
If the noise persists after all other
measures have been taken, it may
be originating from the compressor.
Loose part(s) Locate and tighten loose part(s)
Extreme condensation inside the
refrigerator
Controller is set at a very cold
position
Set the controller to a warmer
position & check to see if compressor
stops as should
The outside environment’s relative
humidity is very high (over 75%)
This type of occurrence is caused by
local climatic conditions and not by
the refrigeration unit
The refrigerator door won’t shut
completely
Check the door and/or the magnetic
gasket. Adjust the door hinges if
needed; replace the gasket if broken
The refrigerator had been placed at
an inadequate location
The unit must not be near sources
that produce too much heat

15
Condensing unit runs for long periods
of time
Excessive amount of warm product
placed in cabinet
Advise user to leave adequate time
for products to cool down
Prolonged door opening or door ajar
Advise user to ensure doors are
closed when not in use and to avoid
opening doors for long periods of
time
Door gasket(s) not sealing properly
Ensure gaskets are snapped in
completely. Remove gasket and
wash with soap and water. Check
condition of gasket & replace if
necessary
Dirty condenser coil Clean condenser coil
Evaporator coil iced over
Unplug unit and allow coil to defrost.
Make sure thermostat is not set too
cold. Ensure that door gasket(s) are
sealing properly. Select manual
defrost and ensure system works

16
Page Left Blank Intentionally

1
UK Head Ofce
Foster Refrigerator
Oldmedow Road
Kings Lynn
Norfolk
PE30 4JU
a Division of ITW (UK) Ltd
Tel: [phone]
Fax: [phone]
Email: [email protected]
Website: www.fosterrefrigerator.co.uk
Foster European Operations
France
Foster Refrigerator France SA
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Germany
Foster Refrigerator Gmbh
Tel: [phone]
Fax: [phone]
Email: [email protected]
HR80MF/BIT25/SM/11/14 GB