Gram Standard Plus Service manual

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765042138 Rev.001 1
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Operating- and servicemanual
Gram Standard Plus / Baker Standard
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765042138 Rev.001 2
Table of contents
Distancetowallandceiling...............................................................................................................................3
Generaldescription...........................................................................................................................................4
Electricalconnection.........................................................................................................................................5
Generaluse........................................................................................................................................................6
Cleaning.............................................................................................................................................................8
Operatingtheproduct.......................................................................................................................................9
Start‐up............................................................................................................................................................11
Defrost.............................................................................................................................................................11
KeyboardLock.................................................................................................................................................11
Changingthetemperature..............................................................................................................................12
ErrorsandAlarms............................................................................................................................................12
Displayoftheevaporatorsensorreading.......................................................................................................13
HACCPAlarms..................................................................................................................................................13
SettingofHACCPalarmvalues........................................................................................................................13
DisplayofHACCPalarms.................................................................................................................................14
DeletionofHACCPalarms...............................................................................................................................14
Cleaningofcondenserfilter............................................................................................................................15
Defaultfactorysettings...................................................................................................................................15
Accesstoserviceparameters..........................................................................................................................16
Parameteroverview........................................................................................................................................17
COMPRESSOR PROTECTION SYSTEM ...................................................................................................... 18
DEFROSTING ................................................................................................................................................. 19
ALARM PARAMETERS ................................................................................................................................... 22
EVAPORATOR FAN PARAMETERS .............................................................................................................. 23
DIGITAL INPUTS " Door Switch, (Multifunction input, not used) .................................................................... 23
DIGITAL OUTPUTS ......................................................................................................................................... 24
SERIAL NETWORK (MODBUS) ..................................................................................................................... 25
Changingdoorhingeside:..............................................................................................................................27
WiringdiagramK/M69...................................................................................................................................32
WiringdiagramF69.........................................................................................................................................33
Pipingdiagram.................................................................................................................................................34
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765042138 Rev.001 3
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Distance to wall and ceiling
The product should be placed as close as possible up against the back
wall. For products with a heating element in the tray on the cabinet
backside, however max. 75 mm from the wall. (K & M models)
There must always be 300 mm of free space above the product, to
ensure that the heat from the condenser can be led away.
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765042138 Rev.001 4
General description
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Compressor
Condenser with air filter
Front panel
Display
Air intake
Air distribution plate
Shelves for storage
Gasket
Door

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765042138 Rev.001 5
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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
Fi
g
. 8
)
. Onl
y
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 service electrician advised by
Gram Commercial during the guarantee period, if it is a product with built-in
compressor.
If it is a product connected to an external compressor unit, it must be examined
by the company who has connected the product to the unit.
Outside the guarantee period, it is advisable to use the service advised by Gram
Commercial, if possible. If this is not the case, assistance is required from
a refri
g
eration compan
y
with knowled
g
e of Gram’s products.
Fig. 5

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765042138 Rev.001 6
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 a service electrician from
Gram Commercial or an authorised refrigeration company with knowledge of Gram’s
products.
Do not re-connect the product to the main supply or use the product before all coverings
are installed, so that live or rotating machine parts can not 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 disconnected at the wall socket or at the
cabinet inlet as shown above (Fig. 5), 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.
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 touchin
g
these components.
Do not use electrical devices inside the product.
To ensure correct and efficient air flow in the cabinet, the upper and lower areas
must be kept free of items as shown on the next page. (see Fig. 6)
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
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765042138 Rev.001 7
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Fig.6
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Do not place foodstuff
below the bottom shelf
support
Donotplacefoodstuff
abovetheupperload‐
line
indication

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765042138 Rev.001 8
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Cleaning
Insufficient cleaning will cause that the product will not work at optimum perfomance, 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 ma
y
cause short-circuits in the electrical s
y
stem.
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 stainless panels of 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.
The air filters on the condenser must be removed and cleaned. This can be
done in a dishwasher at max. 50°C.
For the external maintenance – use stainless steel polish.
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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765042138 Rev.001 9
Operating the product
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Display The display contains the elements that are
shown to the left of this text. Not all the
symbols shown are used in this product. The
symbols that are used are described below.
The temperature is shown in the 4
alphanumeric positions. The individual symbols
show what is in operation.
Symbols
If this symbol is lit, not all HACCP alarms have
been displayed.
If this symbol flashes, the controls have stored
at least one new HACCP alarm.
If this symbol is not lit, then all HACCP related
alarms have been shown or the alarm log has
been deleted.
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If this symbol is lit, then the compressor is in
operation.
If this symbol flashes, the set point of the
controls is about to be changed or the
compressor is being prevented from starting
due to various safety parameters in the
controls.
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If this symbol is lit, the controls are performing
a defrosting process. If this symbol flashes, the
drip time after defrosting is under way or
defrosting could not be commenced due to the
compressor's operation preventing this
defrostin
g
.
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If this symbol is lit, then the evaporator fan is in
operation. If this symbol flashes, it means that
the evaporator fan has been deactivated/limited
in starting by various parameters in the
controls.
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When this symbol is lit, the frame and drainage
heating elements respectively have been
switched on
(
onl
y
applies to freezers
)
.
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When this symbol is lit, the cabinet is in energy-
saving mode.
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When this symbol is lit, it is time to clean the
cabinet's condenser

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765042138 Rev.001 10
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When this symbol is lit, there is a current alarm
or a sensor fault that needs to be addressed.
This symbol indicates that the temperature in
the displa
y
is measured in °C
When this symbol is lit, the cabinet is in
standb
y
mode.
Operating
buttons 
On/off button. Used to switch the cabinet on or
off and to exit a menu.
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Press the P button to set the desired
temperature in the cabinet /Set point. This
button is also used as a ”select” button.
 +/- buttons. Up/down when making settings.
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The alarm clock is used in connection with
temperature alarms
The defrosting button is used to initiate manual
defrostin
g
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P
-+

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765042138 Rev.001 11
Start-up
Connect the product to the electrical outlet. If the product starts in Standby, do the
following:
 Press the button for approx. 2 sec to switch the product on.
Upon start-up, the display will show the current temperature in the cabinet and relevant
control lights will be lit.
Defrost
The cabinet will start up without a defrost cycle (default setting). This default setting is made due
to the fact that the controller does have a manual defrost button . If a customer does however
desire the cabinet to perform a defrost cycle at start up, this can be adjusted by doing the
following. Parameter "d4" is changed to "1", then the cabinet will start with a defrost cycle. The
duration of the defrost will maximum equal the time "d3" or end if the evaporator sensor reaches
Temperature "d2". (See the parameter list)
Keyboard Lock
If the display is locked, attempts to switch the cabinet off or to enter settings will result in
the display showing Loc. In this state, no settings can be made on the controls.
The keyboard for the controls can be unlocked by simultaneously pressing and
for approx. 1 second. The display will now show UnL, and the display is unlocked.
The keyboard can be locked in the same manner. After being locked, the display will
show Loc, and the display is locked.
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765042138 Rev.001 12
Changing the temperature
To set the desired set point, do the following:
 Briefly press the button . Once this has been done, the current set point of the
product is shown in the display. Furthermore, the symbol will flash as an
indication that the set point is about to be changed. The set point can now be
changed using or .
 Each time or is pressed, the temperature is changed by 0.1 degrees up or
down respectively. If or is pressed continuously, then the set point is
changed continuously.
 Once the desired set point has been set, the new value is shown in the display.
 Pressing the button saves the new set point, and the controller does
return to normal operation.
If there is no confirmation by pressing the button , the controller will return to normal
operation after 15 seconds. Those changes that might have been performed with respect
to the set point will then be saved such that the value set will become the new cabinet set
point.
Errors and Alarms
Display Description
 AL Low temperature alarm.
This alarm is saved in the alarm log.
 High temperature alarm.
This alarm is saved in the alarm log.
 ∟d
Door alarm, if the door remains open or is not properly closed.
This alarm is cancelled when the door is closed properly again.
The alarm will however be kept in haccp log.
 Pr1 
Room sensor error.
The error display will persist until the fault is remedied.
Service is required for the product.
 Pr2 
Evaporator sensor error.
The error display will persist until the fault is remedied.
Service is required for the product.
P
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P
P

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765042138 Rev.001 13
Display of the evaporator sensor reading
In order to check the evaporator temperature / the function of the evaporator sensor, it is possible
to read out the evaporator temperature from the controller display. This is done by holding for
approx. 2 Seconds. The dispaly will then show “rCH“. Press until“PB2“isshowninthedisplay.
Inordertodisplaythecurrentreadingofprobe2„PB2“,whichistheevaporatorsensor,itisnownecessary
topress .Nowtheevaporatortemperatureisdisplayed.Inordertoendthereadoutpress .If
nothingfurtheristouchedfor60seconds,thedisplaywillreturntostandardoperationshowingthecabinet
temperature.
HACCP Alarms
ThecontrolscanstoreuptothreeHACCPalarms.Theinformationsavedforthesealarmsis:
 Thecriticalvalue(s)
 Durationofthealarm
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Thecontrolscandisplaythefollowingalarms:
Display Explanation
ALLowtemperaturealarm.Theread‐outprovidedbythecontrolsforthealarmshows
thelowesttemperaturethathasoccurredinthecabinetandhowlongthecabinet
temperaturehasbeenunderthesetalarmvalue(A1).

Hightemperaturealarm.Theread‐outprovidedbythecontrolsforthealarmshows
thehighesttemperaturethathasoccurredinthecabinetandhowlongthecabinet
temperaturehasbeenabovethesetalarmvalue(A4).
˪d 
Door alarm. Theread‐outprovidedbythecontrolsforthealarmshowsthehighest
temperaturethathasoccurredinthecabinetduringthistypeofalarmandhowlong
thedoorhasbeenopen.
Setting of HACCP alarm values
Thisisdonebypressing and simultaneously until A1 is shown in the display. Then
press or to switch between the individual parameters (A1, A4 and A7). The PA
parameter, which appears when browsing as described above, is treated in the chapter on
service parameters.
Display Explanation
 Lowtemperaturealarmlimit.Thedefaultsettingis‐35°C
 Hightemperaturealarmlimit.Thedefaultsettingis+25°C
 TimedelayforA1andA4.Thedefaultis60minutes.
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+-

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765042138 Rev.001 14
Display of HACCP alarms
If there have been or still are one or more alarms for the cabinet, this will be indicated by
the controls.
When “HACCP” is continuously lit in the control display, not all HACCP alarms have been
read out.
If “HACCP” flashes, the controls have stored at least one new HACCP alarm.
If “HACCP” is not lit, then all HACCP related alarms have been shown or the alarm log has
been deleted.
If one or more alarms are active for the cabinet, then the symbol will be lit. Active
alarms cannot be deleted.
If “HACCP” is either continuously lit or flashing in the display, it is possible to read out the
alarm(s) contained in the log. This is done by pressing the button . This action causes
LS to appear on the control display. Pressing will then cause information on the first
possible alarm type to be displayed. Pressing or will cause the controls to switch
between the different alarms if there are more than one type. When the alarm for which
data is desired to be read out is reached, then do the following.
example:
The controls show AH. Press .
The controls will now show the data that relates to the AH alarm. Each individual step is
shown for approx. 1 second. The sequence is as follows:
Display Explanation
.°C
The critical highest temperature under the AH alarm in °C
dur  Duration of the alarm
H01  Number of hours the temperature alarm has lasted (1 hour)
n20  Number of minutes the temperature alarm has lasted (n is used because
the display cannot write "m" for minutes)
AH  Alarm type (AH for high temperature alarm)
To leave this part of the display and return to the LS display, press once. To exit the
alarm log, press once on or twice on . To delete the alarm log instead, do as
described in the following.
Deletion of HACCP alarms
When all relevant alarms have been checked and none of them are active any longer, then
the log can be deleted in the manner described below.
Pressthe button once, after which the display shows LS. By pressing once more on
the display will show rLS, which is the reset of the alarm log. When this appears in the
P
+-
P

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765042138 Rev.001 15
display, then press . The display now shows 0. Press the button until the display
shows 149. Pressing the button continuously causes the numerical value to change
more quickly. If you run past 149, the button can be used to correct the value. When
the display shows 149, confirm the deletion by pressing . The controls confirm the
deletion by showing ” ---- ” which will flash for 4 seconds.
Cleaning of condenser filter
Reminder about cleaning the condenser's air filter:
To ensure the proper operation of the cabinet, it will be periodically indicated that the filter
in front of the condenser has to be cleaned. This is indicated by the warning light being
lit.
Resetting of condenser filter alarm:
After the filter has been cleaned, the controls must be reset to remove the filter alarm.
Resetting can only be done by a specific key combination.
 Press the button until the control display shows a combination of letters.
 Using the button or , press if necessary until the display shows rCH.
 When the display shows rCH, then press .
 Then press the button or until the display shows 149.
 When the display shows 149, press .
 This causes the display to show ---- for approx. 4 seconds, which confirms that
the counter has been reset.
Now the warning light is shut off and the controls return to normal operation according
to parameter “C10”.
Default factory settings
The controller can be reset to default factory settings. Please be aware that default factory
settings of the controller can differ from the settings implemented when the cabinet was
delivered. Therefore some parameters might have to be modified after resetting to
controller factory setting.
Press buttom and at the same time for approximately 4 seconds untill the Display shows
"". Then press or untill the display shows “PA“. Press buttom , and the display
will show „“. Change this value by using or untill the value ”” is shown and then
press and the display will again show “PA“.
P+
+
-
P
-
+-
P
+-
P

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765042138 Rev.001 16
Then press and at the same time and keep them pressed untill the display shows “dEF“.
Press buttom , and the display will show „“. Change this value by using or untill
the value ”” is shown and then press .
After this the display shows “dEF“ 4 times and then the default controller settings are restored.
Turn off the power supply to the cabinet and then turn it back on to implement the reset.
The cabinet will start under normal running condition.
Access to service parameters
Press buttons and at the same time for approximately 4 seconds untill the Display shows
"". Then press or untill the display shows “PA“. Press buttom , and the display
will show „“. Change this value by using or untill the value ”-” is shown and then
press and the display will again show “PA“.
Then press and at the same time and keep them pressed untill the display shows the
first service parameter “SP“.
With the buttons and it is now possible to select the diffrent service parameters.
Press the button to access the parameter and then use buttons and to change the
value of the parameter. By pressing the entered value will be saved.
To leave the service parameters press or keep and pressed for approximately 4
seconds. If no buttons are pressed for 60 seconds the controller automatically leves the service
parameter settings.
Turn off the power supply to the cabinet and then turn it back on to implenet the reset.
The cabinet will start under normal running condition.

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765042138 Rev.001 17
Parameter overview
Freezer Refrigera
tor
extended
Refriger
ator Cabinet type
-22 /-10 -5/+12 +2/+12 Temperature area
45-358-
0133 45-358- 0134
45-358-
0132
GRAM sparepart item number
Para-
meter Maxi- mum Mini- mum Value Factory setting
SPr1 r2 °C/°F -18 5 5 Temperature setpoint
CA1-25.0 25.0 °C/°F 0 0 0 Offset room sensor
CA2-25.0 25.0 °C/°F 0 0 0 Offset evaporator sensor
CA3-25.0 25.0 °C/°F Not applicable Offset condensor sensor
P10 1 - - - - 0 0 0 Celsius grade decimal point; 0=no; 1=yes
P20 1 - - - - 0 0 0 Temperature unit of measurement; 0=°C; 1=°F
P3
0 2 - - - - 1 1 1
Evaporator sensor function;
0= sensor absent;
1=defrosting probe and probe for evaporator fan on/off;
2=probe for evaporator fan on/off
P40 1 - - - - 0 # # Enable condenser sensor 1=yes 0=no
P5
°C/°F 3 3 3
Digital Filter value (if P5 is set to a value (0= filter OFF)
, if measured temperature is inside the interval
SETPOINT-P5 and SETPOINT + P5, value shown on
the display is SETPOINT. If temperature measured is
outside previous interval, value shown on the display
will be real temperature.
P60 1 - - - - 1 1 1 Hysteresis type; 0=asymmetric; 1=symmetric
P80 250 ds 100 100 100 Display update time of temperature sensor
r00 15 °C/°F 2 2 2 Working setpoint differential (Hysterese)
r1-99.0 r2 °C/°F -22 -5 2 Minimum working temperature setpoint
r2r1 99.0 °C/°F -10 12 12 Maximum working temperature setpoint
r30 1 - - - - 0 0 0 Blocking setpoint calibration for user; 0=no; 1=yes
r40 99 0 # # Value of set Increase after energy saving cycle
activation
r50 99 °C/°F 0 0 0 Decrease in temperature during Overcooling function;
see also r6
r6
0 240 min 0 0 0 Duration of Overcooling function
r7
0 99 °C/°F # # #
minimum difference “cell temperature - working
setpoint” (when the instrument switches on) such as to
provoke the exclusion of the
consequent value of the evaporator temperature among
the ones used for the calculation of the relative average
(for the defrost activation;
only if d8 = 3); also look at d17
#Notrelevantornotavailble


765042138 Rev.001 18

COMPRESSOR PROTECTION SYSTEM
Freezer Refrige-
rator
extended
Refrige-
rator Cabinet type
-22 /-10 -5/+12 +2/+12 Temperature area
Para-
meter Maxi- mum Mini- mum Value Factory setting
C00 240 min 5 5 5 Delay in switching on compressor after turning on
cabinet
C10 240 min 5 5 5 Minimum time between two consecutive compressor
start-ups; also delay in compressor start-up after
conclusion of cell probe error ; overuled by C2+C3;
C20 240 min 5 5 5 Minimum duration of compressor switch off time
C30 240 sec 240 240 240 Minimum duration of compressor switch on time
C40 240 min 10 10 10 Duration of compressor switch off during room
sensor error (code “Pr1”); see also C5
C50 240 min 30 10 10 Duration of compressor switch on during room
sensor error (code “Pr1”); see also C4
C60.0 199.0 °C/°F
# # # Condenser temperature is higher than that at which the condenser overheating alarm is activated (code
“COH”
)
C70.0 199.0 °C/°F
# # # condenser temperature is higher than the limit at which the compressor blocked alarm is activated
(code “CSd”)
C80 15 min
# # # Delay for compressor alarm (code “CSd”)
C100 9.999 hr 2160 1440 1440
number of compressor operating hours is higher than
the limit at which the need for maintenance is
signaled (Interval for condenser/filter cleaning).
0 = function absent
#Notrelevantornotavailble


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765042138 Rev.001 19
DEFROSTING
Freezer Refrige-
rator
extended
Refrige-
rator Cabinet type
-22 /-10 -5/+12 +2/+12 Temperature area
Para-
meter Maxi- mum Mini- mum Value Factory setting
d00 99 hr 6 6 6 defrosting interval (only if d8 = 0, 1 or 2)
0= never activated
d1
0 2 - - - - 0 0 2
Defrost type
0 = Electric
1 = Hotgas
2 = Compressor stop
type of defrosting 0= ELECTRIC - during defrosting
the compressor will remain off and the defrosting
output will be activated; evaporator fan activity will
depend on parameter F2; 1=BY HOT GAS - during
defrosting the compressor will be switched on and
the defrosting output will be activated; evaporator fan
activity will depend on parameter F2; 2=VIA
STOPPING OF COMPRESSOR - during defrosting
the compressor will remain switched off and the
defrosting output will remain disactivated; evaporator
fan activit
y
will depend on parameter F2
d2-99 99 °C/°F 12 7 4 evaporator temperature at end of defrosting (only if
P3 = 1); see also d3 valid if P3=1
d30 99 min 30 30 30 if P3 = 0 or 2, defrosting duration; if P3 = 1,
maximum defrosting duration; see also d2; 0= defrost
will be never activated
d40 1 - - - - 0 0 0 defrosting when instrument is switched on (only if d8
= 0, 1, 2 or 3) 1=yes 0=no
d50 99 min 30 30 30 If d4 = 1, delay in activation of defrosting after
cabinet is turned on
If d4=0 minimum time between turning on cabinet
and defrost activation
#Notrelevantornotavailble 


765042138 Rev.001 20
Freezer Refrige-
rator
extended
Refrige-
rator Cabinet type
-22 /-10 -5/+12 +2/+12 Temperature area
Para-
meter Maxi- mum Mini- mum Value Factory setting
d6
0 1 - - - - 1 1 1 Temperature displayed during defrosting 0= Room temperature
1= N/A
d70 15 min 4 4 0 Dripping duration
d8
0 4 - - - - 0 0 0
Defrosting activation criterias
0 = Interval cabinet runtime - defrosting will be
activated once the cabinet has been running for a
certain amount of time, designated as d0
1 = Interval compressor runtime - defrosting will be
activated once the compressor has been switched on
for time d0
2 = Interval evaporator temperature - defrosting will
be activated once the evaporator temperature has
been below temperature d9 for time d0
3 = Temperature - defrosting will be activated when
one of the following conditions is present :
- condition 1: “room temperature - evaporator
temperature” difference has been higher than
temperature d10 for time d12;
- condition 2: evaporator temperature has been
below temperature d9 for time d14
d9
-99 99 °C/°F
0 0 0
evaporator temperature is higher than that at which
the defrost intervalcounter is suspended (only if d8=
2 or if d8 = 3 and for
condition 2)
d11
0 1 - - - - 1 1 1
Defrosting alarm switches off once maximum time
limit has been reached (code “dFd”; only if P3 = 1
and in absence of an evaporator probe (code “Pr2”)
1 = yes
d150 99 min
0 0 0 minimum time that the compressor must be switched on before defrosting can be activated (only if d1 = 1)
This is valid onl
y
if
y
ou have hot
g
as defrost
d16
0 99 min
0 0 0
Predripping duration (during predripping the
compressor will remain switched off, the defrosting
output will be activated and the
evaporator fan will remain switched off)
d17
1 10 # # #
number of evaporator temperature values used for
the calculation of the relative average (for the defrost
activation; only if d8 = 3); also look
at r7, i11 and i12
d180 3.000 min
# # # Defrosting interval (only if d8 = 3 and for condition 1)
0 = defrosting for condition 1 will never be activated
d190 40 °C/°F
# # # evaporator temperature above which the defrost is activated (relative to the evaporator temperatures
avera
g
e, or “evaporator temperatures