Gram COMPACT 220 Series User manual

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Service manual
COMPACT 220/320/420
Gram Commercial (CVR-nr. 41423986)
Aage Grams Vej 1
6500 Vojens, Denmark
Item number: 765042425
Release date:
Released by: JABP
Revision date:
Revision no.: 0000
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Content
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Scopeofthisservicemanual............................................................................................................................................................................................3
Introductiontothismanual.............................................................................................................................................................................................3
Intendeduse....................................................................................................................................................................................................................4
Safetyinformation...........................................................................................................................................................................................................4
Location...........................................................................................................................................................................................................................5
Optimizingtheenergyconsumption................................................................................................................................................................................7
Generaldescription.........................................................................................................................................................................................................8
Refrigerant/GWP...........................................................................................................................................................................................................8
Climate/temperatureclass.............................................................................................................................................................................................9
Electricalconnection........................................................................................................................................................................................................9
Generaluse....................................................................................................................................................................................................................10
Operatingtheproduct...................................................................................................................................................................................................11
Keylock...........................................................................................................................................................................................................................12
Adjustingthecabinettemperature................................................................................................................................................................................12
Settingtemperaturealarmparameters.........................................................................................................................................................................13
Temperaturealarms......................................................................................................................................................................................................14
Messagesandalarmsshowninthedisplay...................................................................................................................................................................15
Defrosting......................................................................................................................................................................................................................15
Defrostwater.................................................................................................................................................................................................................16
Reversingthedoor.........................................................................................................................................................................................................16
Light–glassdoor...........................................................................................................................................................................................................17
Cleaning.........................................................................................................................................................................................................................17
Doorgaskets..................................................................................................................................................................................................................17
Longtermstorage..........................................................................................................................................................................................................18
Service...........................................................................................................................................................................................................................18
Disposal.........................................................................................................................................................................................................................18
Entering/adjustingfactorydefaultparametersettings..................................................................................................................................................19
Parametersanddefaultsettings....................................................................................................................................................................................20
Testofinputs/outputs.................................................................................................................................................................................................23
Howtophysicallyaccessthecontroller.........................................................................................................................................................................24
Howtobootthecorrectsoftwareonasparepartcontroller........................................................................................................................................25
Howtochangethecontroller........................................................................................................................................................................................25
Controllerlayoutanddescription..................................................................................................................................................................................26
Reversingtheglassdoor.................................................................................................................................................................................................27
EC‐Declarationofconformity.........................................................................................................................................................................................28
Wiringdiagram–K220/320/420...................................................................................................................................................................................29
Wiringdiagram–KG220/320/420................................................................................................................................................................................30
Wiringdiagram–F220/320/420...................................................................................................................................................................................31
Wiringdiagram–FG220...............................................................................................................................................................................................32
Pipingdiagram...............................................................................................................................................................................................................33
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Scope of this service manual
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This service manual is made in order to aid service technicians when servicing and troubleshooting
on the Gram Compact product range, and in particular related to the electrical controller (GCC).
The service manual is not intended to be handed to end-users, since unintended changes of
settings potentially can cause situations where the temperature inside the cabinet cannot be kept as
intended, (high foodstuff temperatures can occur if wrong adjustments are made).
Another side effect of making unintended changes of the controller settings, is potentially causing
damage to the refrigeration system.
Changing service level parameter settings to differ from the factory default, will void the
warranty!
This service manual does explain how to access the different additional controller levels related to
service. These levels are:
 Entering / adjusting factory default parameter settings (adjustable if necessary)
 Entering and using the I/O test area
 How to boot the correct software on a spare part controller
 How to change the controller and what to take care of while doing so
Furthermore, this manual does explain:
 The layout of the controller and the different connections including the specifications of these.
 EC declaration of conformity
 Wiring diagrams for:
o K – Models (Refrigerators with solid door)
o F – Models (Freezers with solid door)
o KG/FG – Models (Refrigerators and freezers with glass door)
Introduction to this manual
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This manual will advise you how to service the product.
Changes in installation and other use of the product than described under intended use, might affect
the operation and durability of the product.
The manual is written according to our current technical knowledge. We constantly work on
updating this information, and we reserve the right to make technical changes.
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User manual
Intended use
The product is intended for the storage of foodstuffs in non-household environments but not for the
display to or access by customers.
The product is designed for storage at a constant temperature and is not to be used for chilling
down or freezing hot/fresh foodstuff.
The product is only to be used for the purpose for which it has been expressly designed. Any other
use could cause that the foodstuff stored in the product is not kept at the correct temperature or
even cause damage to the product.
The product is not suited for storing blood plasma, laboratory samples, pharmaceuticals or similar
substances.
The manufacturer will not be held liable or responsible for any damage caused by improper,
incorrect or unreasonable use of the product.
Safety information
Important
Description of symbols used in this manual.
Warning Lacking observation to these instructions might result in accidents with
personal injury.
Important If these instructions are not observed, the product might be damaged or
destroyed.
Be aware that Gram Commercial has taken precautions to ensure that the safety of the product is
in order.
Please read carefully the following information regarding safety.
It is important, that everyone who are to use or install the product, to have access to this
manual.
This appliance is not intended for use by persons with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
The appliance might contain parts with sharp edges in the compressor compartment, and in
the inside compartment.
The appliance is not to be transported on a sack truck, there is a danger of losing the
balance, causing danger to persons.
Do not pull the power cord to disconnect the appliance, or when moving the appliance.
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Location
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When receiving the product, check the packaging material for damage.
If any damage occurs at the packaging material, it should be considered if the product might have
been damaged too. If the damage is substantial, please contact your dealer.
How to remove the transport pallet:
COMPACT 220 with skids/small wheels:
The cabinet can be lifted off the pallet (see Fig.1).
COMPACT 220/320/420 with castors or legs:
The cabinet is tilted slightly backward, and the front part of the pallet can be removed.
Then the cabinet is tilted slightly forward, and the rear part can be removed. (see Fig.2)
This task requires at least 2 persons.
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Fig.1 Fig. 2
If the cabinet has been transported in horizontal position it must stand upright at least 2
hours before it is started to allow the oil from the compressor to run back.
Because of the heavy weight of the product, the floor might be damaged or scratched
when moving the product.
Correct set up gives the most effective operation.
The product should be located in a dry and adequately ventilated room.
To ensure efficient operation, it may not be placed in direct sunlight or against heat-
emitting surfaces. The product is designed to operate in an ambient temperature
between +16C and +30°C.
Avoid placement of the product in a chlorine/acid-containing environment (swimming
bath etc.) due to risk of corrosion.
Parts of the product is equipped with a protecting film, which should be removed before
use.

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Clean the product with a mild soap solution before use.
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The set-up place must be level and horizontal.
For versions with legs, use the adjustable legs to make sure that the product stands
level and upright, see Fig.3.
For versions with castors, the locking devices of the two front castors must be activated, when the
product is in place, see Fig.3. The base must be level, and the product may not be placed on
frames or the like.
Fig. 3
Cabinets equipped with a glass door, must be fastened to a stable surface to ensure the cabinet
does not tilt, when the door is open. Brackets for fastening are supplied with the cabinet (fasteners
not supplied, use fasteners according to wall material/type).
See how to mount brackets in Fig.4
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Fig. 4
20
28
475
Upper edge of cabinet

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To ensure that users, surroundings and stored items are not injured/damaged if the cabinets
tilts, these brackets must be mounted.
The cabinet can be installed freestanding, against a wall or COMPACT 220 can be built under a
worktop.
The cabinet must have sufficient ventilation and free air circulation beneath, above and behind the
cabinet. There must be a minimum clearance of 30 mm above the cabinet, and 20 mm at the
sides.
Fig. 5
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Optimizing the energy consumption
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 Correct set up gives the most effective operation.
 The product should be located in a dry and adequately ventilated room.
 To ensure efficient operation, it may not be placed in direct sunlight or against heat-emitting
surfaces. The product is designed to operate in an ambient temperature between +16C
and +30°C.
 Do not keep the door open for too long.
 Do not set the temperature setpoint too low.
 The product should be placed as close as possible up against the wall.
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Min. 860
30
AB

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General description
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Fig. 6
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Refrigerant / GWP
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Refrigerators Refrigerant Charge kg GWP
CO2
equivalent
COMPACT K 220 R600a 0,033 3 0,10
COMPACT KG 220 R600a 0,031 3 0,09
COMPACT K 320 R600a 0,043 3 0,13
COMPACT KG 320 R600a 0,043 3 0,13
COMPACT K 420 R600a 0,045 3 0,14
COMPACT KG 420 R600a 0,045 3 0,14
Freezers
COMPACT F 220 R600a 0,029 3 0,10
COMPACT FG 220 R600a 0,029 3 0,10
COMPACT F 320 R600a 0,035 3 0,11
COMPACT F 420 R600a 0,060 3 0,18
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Compressor
Condenser
Control panel
Display
Air intake
Door gasket
Door
Shelves for storage
Air distribution plate
Main supply inlet
Re-evaporation tray
Made i n DK . CV R nr. 1 2 00 66 3 2
Type BAKER M 625 CCG 20B
Part No966250101
PO No 1032171 YYYY- WW2018-49
S/N 10285490
Foam Prope llan t C yclopentane
Permissible operation over-pressure: Suction side:
Discharge side:
Gram Commercial A/S, Denmark
10109429
10285490
Input: 230 V50 Hz 231 W1,29 A
Defrost 360 w
Refri gerant R290
CO2e 1
Climate class 5 (M1)
Isolation class IP21
10,0 bar
25,0 bar
113g
Name plate

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Climate / temperature class
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Products are tested according to the following climate and temperature classes. Information about
the product’s climate and temperature class can be found at the name plate (see fig.12)
Electrical connection
Read the text below thoroughly before electrical connection.
The product is intended for connection to alternating current. The connection voltage (V)
and frequency (Hz) are shown on the name plate in the cabinet (see Fig.6). Only the
supplied cord is to be used.
Never use an extension cord for this appliance!
If a wall socket is placed in a longer distance than the length of the supplied power cord,
contact an electrician to establish a wall socket within the range of the supplied power
cord.
If the product is defective, it must be examined by a properly skilled technician with
proper knowledge of the product during the warranty period.
Outside the warranty period, it is advisable to use the service advised by your dealer. If
this is not the case, assistance is required from a properly skilled technician with proper
knowledge of the product.
Always disconnect the power if interruptions in power supply occur, and when electrical parts are
removed/put on, and before cleaning and maintenance of the product.
Repairing of electrical/technical parts may only be performed by properly skilled technicians with
proper knowledge of the product.
Do not use the product before all coverings are installed, so that live or rotating machine parts
cannot be touched.
The product is not to be used outdoor.
All earthing requirements stipulated by the local electricity authorities must be observed. The plug
and wall socket should then give correct earthing. If necessary, contact an electrician.
Make sure the product is switched off at the socket before service is performed
on electrical parts. It is not sufficient to switch off the product by the
START/STOP key as there will still be voltage to some electrical parts of the
product.
Climate class
3 25°C / 60 % RH
4 30°C / 55 % RH
Temperature
class
L1 -18°C
M1 +5°C

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Always disconnect the power if interruptions in power supply occur, and when electrical parts are
removed/put on, and before cleaning and maintenance of the product.
Repairing of electrical/technical parts may only be performed by properly skilled technicians with
proper knowledge of the product.
Do not use the product before all coverings are installed, so that live or rotating machine parts
cannot be touched.
The product is not to be used outdoor.
All earthing requirements stipulated by the local electricity authorities must be observed. The plug
and wall socket should then give correct earthing. If necessary, contact an electrician.
Make sure the product is switched off at the socket before service is performed
on electrical parts. It is not sufficient to switch off the product by the
START/STOP key as there will still be voltage to some electrical parts of the
product.
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General use
Do not damage the refrigeration system parts.
During normal operation, some parts of the refrigeration system in the compressor
compartment might reach high temperatures and could therefore cause burns if touching
these components.
Do not use electrical devices inside the product.
To ensure correct and efficient air flow in the cabinet, the shaded areas must be kept free of
items.
All items to be stored, that are not wrapped or packed, must be covered in order to avoid
unnecessary corrosion of the inner parts of the cabinet.
If any controller parameters are changed from default, this could cause that the product is not
functioning normally, and harmful temperatures could damage items that are kept inside the
product.
If the product is turned off, wait minimum 3 minutes before turning it on again. This is to
protect the compressor from damage
Maximum loading of wire shelf: 40 kg
Do not store explosive substances such as aerosol cans with flammable propellant in this
appliance.
Be aware, if bottles are stored near the air outlet, they may freeze up and break, causing a risk of
injury (only K and KG products).
Do not overpack the product with foods. Allow some space between them to ensure a good airflow.
Moist or fresh foods and those with a strong smell should be wrapped up in a plastic film or packed
in a container. Otherwise the food may dry out or give their smell to other foods.
Foods containing acetic acid or yeast should be wrapped up in plastic film. Otherwise they may
accelerate corrosion of the evaporator and metal parts, resulting in failure.

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To ensure correct and efficient air flow in the product, the shaded areas and the area above the
top load line must be kept free of items. (see Fig. 7)
Fig. 7
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Operating the product
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Display overview
If the cabinet is not turned on when connecting it to the main power source, the following must be
done:
To turn the cabinet on, push and hold the key for 5 seconds.
Do not place products
below the bottom shelf
support.
Defrost symbol
Evaporator fan symbol
Compressor symbol
Temperature alarm symbol
Keylock symbol
Light key (only on glass door cabinets) Alarm key
On/off key
- key
+ key P key

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During a short boot sequence, all light segments in the display are lit. After that the controller does
start up in normal operation mode.
This does mean that the refrigeration system will work to reach and maintain the factory adjusted
default set temperature:
For refrigerators (K and KG-models) this set point is 5°C (adjustable from 2 to 12°C)
For freezers (F and FG-models) this set point is -18°C (adjustable from -10 to -22°C)
The cabinet is turned off likewise, by pushing and holding the key for 5 seconds.
Control lights
The following control lights are located on the display:
Compressor symbol. This LED is on while the compressor is running. Flashes during
temperature setting.
Defrost symbol. This LED is lit constantly during the defrosting cycle.
Evaporator fan symbol. This LED is turned on while the evaporator fan is running.
Temperature alarm symbol. This LED is turned on if a temperature alarm occurs. See
chapter on temperature alarms.
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Keylock
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A condition for any adjustments to the controller settings whatsoever, is making sure that the
controller keys are not locked. When powering up the controller the keys will automatically be locked
after two minutes.
This is done to prevent unintended changes of settings due to cleaning and daily use. Furthermore,
it is done in order to minimize the risk of unauthorized tampering with the controller.
When the display keys are locked the keylock symbol is lit.
To unlock the keys:
Push and hold any key for 5 seconds to unlock the controller keys. During this period of unlocking,
the keylock symbol flashes simultaniously with the display flashing UnL. When the controller has
been successfully unlocked, the keylock symbol turns off, and the display reverts to normal
operation.
To lock the keys:
Leaving the controller without touching any key for two minutes, will result in the keylock being
activated automatically. The change from being unlocked to being locked is shown by flashing the
keylock symbol simultaneously with the display flashing Loc for the last 5 seconds. After that the
keylock symbol is lit and the keys are locked. The display does reverts to normal operation.
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Adjusting the cabinet temperature
To change the set temperature, push once, flashes, and the current set point is shown in the
display, with one decimal place after the comma.

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Push or to change the temperature set point. The new set point temperature is
confirmed/saved by pushing once. The display returns to normal operation.
To exit without change push once, or do not touch any key for 60 seconds
After power failure the controller returns to stored settings.
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Setting temperature alarm parameters
Adapting the below parameters to suit the real conditions of use, it is important to ensure that the
settings do not make the alarm system either too sensitive or too insensible.
Adjusting the difference between temperature set point and hAL / LAL alarm settings to narrow,
will result in unintended alarms. A narrow gab combined with a too short dAh could result in an AH
alarm, just by opening the door.
dAh should never be adjusted to less than 30 minutes.
To access the temperature alarm parameters, push and hold and simultaneously for 5
seconds. The display will flash the first temperature alarm parameter hAL.
To access the individual parameters push .
To move between and adjust the parameters use and .
Push to store the new setting. The controller automatically jumps to the next parameter.
Adjustable parameters are:
Factory default
hAL High Alarm Limit + 25° C
LAL Low Alarm Limit - 29° C
dAh Time delay Alarm high 120 minutes
dAL Time delay Alarm Low 20 minutes
Atd Alarm temperature differential 2K
The above parameter settings will result in the following:
To trigger a high temperature alarm (Ah) the cabinet temperature must be above hAL = 25°C for
more than dAh = 120 minutes. This will result in being lit and the display alternating between Ah
and the present cabinet temperature.
Once the temperature goes below 23°C (hAL – Atd) the alarm changes from present to being
logged. The display will show current temperature and will remain lit indicating there has been a
temperature alarm.
To trigger a Low temperature alarm (AL) the cabinet temperature must be below LAL = -29°C for
more than dAL = 20 minutes. This will result in being lit and the display alternating between AL
and the present cabinet temperature.
Once the temperature goes above -27°C (LAL + Atd) the alarm changes from present to being
logged. The display will show current temperature and will remain lit indicating there has been a
temperature alarm.
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14
Temperature alarms
The following temperature alarms can be displayed:
Ah Alarm high temperature
AL Alarm Low temperature
If an alarm occur, Ah or AL will be shown alternating with the current temperature.
If the temperature gets back within the accepted limits, the current temperature will be shown in the
display and will remain lit until the alarm has been reset. After 3 days will be turned off, but the
alarm will still be kept in the alarm log.
Displaying alarms:
The temperature alarm log stores information related to the latest 10 temperature alarms (named A
1 to A10). If a new alarm occurs the oldest alarm (A10) will be erased.
Push once to open the log.
 If there is no present or logged temperature alarm the display will show “no” flashing for 4
seconds. After that the controller will revert to normal operation.
 If there are present or logged temperature alarms the display will show the most recent
temperature alarm being:
A 0 Present / ongoing temperature alarm.
A 1.. A10 Not present temperature alarms logged
Once the cabinet temperature, related to a present temperature alarm (A 0), is no longer outside the
alarm ranges, this A 0 alarm becomes the new A 1. Etc.
Use and to navigate between the different alarms.
Push to open a temperature alarm in order to show:
Example 1 – alarm A 0: (Present temperature alarm)
Ah Indicating it is a high temperature alarm (AL indicating a low temperature alarm)
8.0 the maximum temperature in °C during the alarm (If AL the minimum temperature)
dur alarm duration until now
01h the alarm has been ongoing for 1 hour
15’ …. and 15 minutes
Example 2 – alarm A1 to A10: (alarms in the log – not present)
Ah Indicating it is a high temperature alarm (AL indicating a low temperature alarm)
9.0 the maximum temperature in °C during the alarm (If AL the minimum temperature)
dur alarm duration
01h the alarm lasted for 1 hour
15’ …. and 15 minutes
tSE time since the end of the alarm
08h the alarm ended 8 hours ago (maximum 99 hours)
Each value is displayed alternately for approx. 1 second.
It is not possible to reset or delete a present temperature alarm A 0

15
Resetting alarm symbol
Look through all non-present alarms, after each alarm Push to verify having seen the alarm. To
exit an alarm without verifying, push . Once all alarms have been verified, will turn off, unless
there is a present alarm.
Push , to leave alarm log.
Deleting alarms:
Push once to open the log.
Display shows A 1. Delete all non-present temperature alarms by holding for 5 seconds. Once
the alarm log is deleted the display flashes “ - - - ” for 3 seconds.
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Messages and alarms shown in the display
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OP OP shown constantly, indicates door open. If alternating with temperature, door has been
open for more than 2 minutes. Close the door and OP will disappear.
E1 E1 indicates defective room sensor. Monitor temperature until replaced.
Request service assistance immediately.
E2 Alternating between E2 and temperature indicates defective evaporator sensor.
Defrosting will be time-based. (freezer) Request service assistance.
Ah Alarm high temperature – See explanation under temperature alarms
AL Alarm Low temperature – See explanation under temperature alarms
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Defrosting
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COMPACT K/KG:
Defrosting is automatically performed 4 times every 24 hours. is lit.
COMPACT F/FG:
Defrosting is automatically performed 4 times every 24 hours. is lit.
Manual defrosting:
If operating with frequent door opening and replenishment, manual defrosting can be necessary.
Manual defrosting is started by holding for 5 seconds.
Do not use sharp or pointed objects to accelerate the defrosting process.
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16
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Defrost water
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The cabinet produces water during defrosting, which is led into a tray in the compressor compartment
(see Fig.6). A re-evaporation pipe from the refrigeration system, placed in the tray, re-evaporates
the water
It is recommended to clean the tray and water trap when necessary - at least once a year.
Remember to disconnect the cabinet before cleaning.
Be careful not to damage the re-evaporation pipe during cleaning.
Reversing the door
Always disconnect the power supply prior to starting the reversing of the door.
The door can be changed from righthand-hinged to lefthand-hinged, or vice versa.
To do so, proceed as follows:
Models with solid door:
Fig. 8
A
B
C
D
1. Switch off the power at the mains socket.
2. Open the door
3. Dismantle the two screws that hold the control panel at the front and loosen the two screws the
hold the tabletop in the back, pull the complete tabletop a little forward, and then tilt it upwards.
4. Dismantle the hinge in pos. A, and lift off the door.
5. Dismantle the hinge in pos. B, and mount it in pos. D.
6. Turn the door 180°, and fit it to the hinge in pos. D.
7. Mount the hinge from pos. A in pos. C, and move the bracket from pos. C to pos. A.
8. Re-position and fasten the tabletop.
9. Apply power to the cabinet again.

17
Models with glass door:
The door should only be reversed by a properly skilled service technician with knowledge of the
product.
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Light – glass door
The light in the glass door, can be switched to work in two different ways.
Light constantly on (Lco) or light off when door closed (Ldo).
Push and hold for 5 seconds to change between Lco and Ldo.
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Cleaning
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Insufficient cleaning will cause that the product will not work at optimum performance, or eventually
it will be defective.
Before cleaning, the product should always be disconnected.
Do not flush the product with water, do not use water jet or steam hose
as this may cause short-circuits in the electrical system.
Cleansing agents containing chlorine or compounds of chlorine as well
as other corrosive means, are not to be used, as they might cause
corrosion to the cabinet and the evaporator.
The compressor compartment and in particular the condenser must be kept free from
dust and dirt. This is best done with a vacuum cleaner and a brush.
For the external maintenance and cleaning – Use a hot soapy damp cloth. After
cleaning rinse off with a moist cloth only containing water. Finalize the cleaning by
wiping the cabinet dry, using a dry cloth. Cabinets with stainless steel exterior, should
be treated with stainless steel polish at the end.
The product should be cleaned internally with a mild soap solution at suitable intervals
and checked thoroughly before it is put into operation again.
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Door gaskets
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This chapter deals with the importance of a well-functioning door gasket.
Gaskets are an important part of a refrigerator/freezer. Gaskets with reduced functionality, reduces
the tightness of the cabinet. Reduced tightness might cause increased humidity, internal icing, an
iced-up evaporator (leading to reduced refrigeration capacity), and in worst case reduced lifecycle
of the cabinet.
Therefore it is important to be aware of the condition of the gasket. Regular inspection is
recommended.
The gasket should be cleaned regularly with a mild soap solution.
If a gasket needs replacement, contact your supplier.
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18
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Long term storage
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If the product is taken out of operation, and need to be prepared for long-term storage,
clean the inside compartment, the door and door gasket thoroughly with a hot soapy damp cloth.
Eventual remnants of food do create mold.
It is advisable to leave the cabinet door open during long term storage, in order to minimize the risk
of bad smell and the building of mold inside the cabinet.
Service
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The refrigerating system and the hermetically sealed compressor require no
maintenance - they merely must be kept clean.
If refrigeration fails, first investigate whether the unit has been unintentionally disconnected or
switched off at the socket, or whether a fuse has blown.
If it is not possible to find the cause of the refrigeration failure, please contact your dealer.
When reporting a malfunction please state the type and the 8-digit serial number (S/N) of the
cabinet. This information is found on the name plate, see Fig. 6.
Disposal
Electrical and electronic equipment (EEE) contains materials, components and substances that
can be dangerous and harmful to human health and the environment if the waste (WEEE) is not
disposed of properly.
Products that are labelled with a “crossed-out wheelie bin” is considered electric and electronic
equipment. The crossed-out wheelie bin symbolizes that waste of this type cannot be disposed of
with unsorted municipal waste but must be collected separately.
Contact your local dealer when the product needs to be disposed of.
Please be aware of not damaging the refrigeration system and piping when a product is taken out
of use. This will prevent the uncontrolled escape of the refrigerant from the refrigeration system.
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Servicemanual
Entering/adjusting factory default parameter settings
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This part of the manual should not be handed to anyone outside the Gram/Hoshizaki organisation,
unless it is necessary.
Prior to entering the controller for whatever reason, it is important to make sure that the controller
keys are not locked. When powering up the controller the keys will automatically be locked after two
minutes.
This is done to prevent unintended changes of settings due to cleaning and daily use. Furthermore,
it is done in order to minimize the risk of unauthorized tampering with the controller.
When the display keys are locked the keylock symbol is lit.
To unlock the keys:
Push and hold any key for 5 seconds to unlock the controller keys. During this period of unlocking,
the keylock symbol flashes simultaniously with the display flashing UnL. When the controller has
been successfully unlocked, the keylock symbol turns off, and the display reverts to normal
operation.
The below list of parameters is divided into different groups, each representing a dedicated area of
the operation cycle. These groups are:
S = System configurations
C = Compressor control related parameters
D = Defrost related parameters
F = Evaporator fan related parameters
A = Alarm related parameters
Under each section there are numerous sub-parameters which can be adjusted.
In order to access the list of parameters and settings, the following must be done:
 Press and hold and simultaneously for 10 sec.
 The first setting group “S” will be shown in the display.
 Use and to navigate between the different setting groups.
 Press to access the chosen setting group.
 Use and to navigate between the different setting names.
 Press to access the chosen setting name.
 Use and to change the settings.
 Press to save the new setting and the display will revert to the setting name.
 Press to move back one level.

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Parameters and default settings
Relation Setting
Group
Setting
name Parameter name Unit Range Adjustment resolution
Default
K
Default
KG
Default
F
Default
FG
SYSTEM S
SYSTEM S1 Default setpoint ° S2 to S3 0,1 5 5 -18 -18
SYSTEM S2 Minimum limit for SP setting ° -30 to S3 1 2 2 -22 -22
SYSTEM S3 Maximum limit for SP setting ° S2 to 20 1 12 12 -10 -10
SYSTEM S4 Celsius grade decimal shown on display 0= No, 1=yes NUMERIC 0 or 1 N/A 0 0 0 0
SYSTEM S5 Evaporator probe 0= absent, 1= present NUMERIC 0 or 1 N/A 0 0 1 1
SYSTEM S6 display update delay (Temperature) SEC 0 to 300 10 10 10 10 10
SYSTEM S7 Temperature fluctuation filter 1 K 0 to 3 0,5 3 3 3 3
SYSTEM S8 Offset room sensor K -5 to +5 0,1 0,0 0,0 0,0 0,0
COMP C
COMP C1 Comp. Cut-in above SP K 1 to 5 0,1 1,5 1,5 1,5 1,5
COMP C2 Comp Cut-out below SP K 1 to 5 0,1 1,5 1,5 1,5 1,5
COMP C3 Comp. On delay at power up Min 0 to 10 1 2 2 2 2
COMP C4 Minimum comp. Off time Min 0 to 30 1 5 5 5 5
COMP C5 Minimum comp. On time Min 0 to 30 1 3 3 3 3
COMP C6 On comp. with defective P1 (room sensor) Min 0 to 30 1 5 5 10 15
COMP C7 Off comp. with defective P1 (room sensor) Min 0 to 30 1 15 10 10 5
COMP C8 Compressor off delay when Id1 activated Min 0 to 10 1 5 5 2 2
1 This means if the temp. detected by the room sensor is within SP ± S7, the display will show SP. When the temperature detected by the room sensor does go above/below SP
± S7. The actual temperature will be displayed. When the temperature does return to being within SP ± S7, the displayed temperature will be actual until SP is reached. When
SP is reached the temperature fluctuation filter will be re-activated.
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