desmon GBF-3GN2/3 User manual

Service Manual
Blast Chiller

Rev 07/04/2015 2

Blast chiller Service Manual
3 Rev 07/04/2015

Rev 07/04/2015 4
Safety Precautions
THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL,
MAINTAIN AND REPAIR ELECTRICAL REFRIGERATION EQUIPMENT, WHO
SHOULD PERFORM THE INITIAL FIELD STARTUP AND ADJUSTMENTS OF THE
EQUIPMENT COVERED BY THIS MANUAL.
READ THIS MANUAL THOROUGHLY BEFORE OPERATING, INSTALLING,
PERFORMING MAINTENANCE ON, OR REPAIRING THE EQUIPMENT.
WARNING Failure to follow all the instructions in this manual can cause
property damage, injury or death.
WARNING Improper installation, adjustment, alteration, service or maintenance
can cause property damage, injury or death.
WARNING Electrical connections should be performed only by a certified
professional.
Electrical and grounding connections must comply with the applicable portions of
the National Electric Code and/or all local electric codes. Failure to comply with this
procedure can cause property damage, injury or death.
WARNING Before connecting the unit to the electrical supply, verify that the
electrical and grounding connections comply with the applicable portions of the
National Electric Code and/or other local electrical codes. Failure to comply with
this procedure can cause property damage, injury or death.
WARNING Before connecting the unit to the electrical supply, verify that the
electrical connection agrees with the specifications on the data plate. Failure to
comply with this procedure can cause property damage, injury or death.
WARNING Appliance must be connected to a grounded, metal, permanent
wiring system. Or an equipment-grounding conductor must be run with the circuit
conductors and connected to the equipment-grounding terminal or lead on the
appliance. Failure to comply with this procedure can cause property damage, injury
or death.
WARNING Appliances equipped with a flexible electric supply cord, are
provided with a three-prong grounding plug. It is imperative that this plug be
connected into a properly grounded three-prong receptacle. Failure to comply with
this procedure can cause property damage, injury or death.
WARNING If the receptacle is not the proper grounding type, contact an
electrician. Do not remove the grounding prong from the plug. Failure to comply
with this procedure can cause property damage, injury or death.
WARNING Before performing any service that involves electrical connection or
disconnection and/or exposure to electrical components, always perform the

Blast chiller Service Manual
5 Rev 07/04/2015
Electrical LOCKOUT/TAGOUT Procedure. Disconnect all circuits. Failure to comply
with this procedure can cause property damage, injury or death.
WARNING Before removing any sheet metal panels, always perform the
Electrical LOCKOUT/TAGOUT Procedure. Be sure all circuits are disconnected.
Failure to comply with this procedure can cause property damage, injury or death.
WARNING Do not operate this equipment without properly placing and securing
all covers and access panels. Failure to comply with this procedure can cause
property damage, injury or death.
WARNING Do not use or store gasoline or other flammable vapors or liquids in
the vicinity of this or any other appliance. Failure to comply can cause property
damage, injury or death.
WARNING In the event of a power failure, do not attempt to operate this
appliance. Failure to comply can cause property damage, injury or death.
General Safety
WARNING Desmon accepts no responsibility for any situation resulting from
work carried out in an unprofessional manner, or from the incorrect interpretation or
application of regulations.
General Installation
WARNING Incorrect installation or any modifications made to the appliance
may damage property or result in injury or death.
Electrical
WARNING Electrical connections or any work required on the electrical circuits
inside the appliance must be performed by certified technicians in compliance with
local, state, and federal regulations.
WARNING Make sure all facility electrical connections are in compliance with
all local and federal electrical code regulations.
Inspection and Maintenance
WARNING Appliance maintenance must be carried out by only by suitably
trained personnel.
WARNING Before any maintenance work is performed, the appliance must be
disconnected from the electrical supply. Apply a lockout tag to the electrical supply
connection.
WARNING All replacement parts that are not supplied by Desmon must be pre-
approved before installation.

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Repair Work Safety
WARNING Repair work must only be performed by Desmon’s approved
distributors or one of its authorized representatives. Desmon accepts no
responsibility for any situation resulting from work performed by untrained and/or
unauthorized technicians.
ELECTRICAL LOCKOUT/TAGOUT PROCEDURE
WARNING Before performing any service that involves electrical connection or
disconnection and/or exposure to electrical components, always follow the
Electrical LOCKOUT/TAGOUT Procedure. Disconnect all circuits. Failure to comply
can cause property damage, injury or death.
The Electrical LOCKOUT/TAGOUT Procedure is used to protect personnel working
on an electrical appliance. Before performing any maintenance or service that
requires exposure to electrical components, follow these steps:
1. In electrical box, place appliance circuit breaker into OFF position.
2. Place a lock or other device on electrical box cover to prevent someone from
placing circuit breaker ON.
3. Place a tag on electrical box cover to indicate that appliance has been
disconnected for service and power should not be restored until tag is removed by
maintenance personnel.
4. Disconnect appliance power cord from electrical outlet.
5. Place a tag on the cord to indicate that unit has been disconnected for service
and power should not be restored until tag is removed by maintenance personnel.

Blast chiller Service Manual
7 Rev 07/04/2015
TABLE OF CONTENTS
1. BASIC SERVICE DIAGNOSTIC (STANDARD CONTROLLER) ............................................................ 9
1.1. ALARM/FAILURE LIST .......................................................................................10
1.2. FAILURE CODE DETAILS..................................................................................11
1.3. SERVICE MENU – CONFIGURATION PARAMETER........................................11
1.3.1 Entering the configuration parameter ........................................................................................ 11
1.3.2 Parameter list (factory setting)................................................................................................... 11
1.3.3 Temperature Probes Display..................................................................................................... 28
2. BASIC SERVICE DIAGNOSTIC (TOUCH SCREEN CONTROLLER).................................................. 33
2.1. ALARM/FAILURE LIST .......................................................................................34
2.2. FAILURE CODE DETAILS..................................................................................36
2.3. SERVICE MENU – CONFIGURATION PARAMETERS......................................37
2.3.1 Entering the configuration parameter ........................................................................................ 37
2.3.2 Parameter list (factory settings)................................................................................................... 1
2.3.3 Temperature Probes Display....................................................................................................... 5
3. TROUBLESHOOTING ............................................................................................................................. 7
3.1. PROBES ...............................................................................................................7
3.1.1. Checking the Probes.............................................................................................8
3.1.2. NTC (10kOhms@25°C/77°F) Diagram..................................................................9
3.1.3. NTC (10kOhms@25°C/77°F) Chart Table...........................................................11
3.1.4. Pt1000 (1kOhms@0°C/32°F) Diagram................................................................12
3.1.5. Pt1000 (1kOhms@0°C/32°F) Chart Table...........................................................12
3.2. DOOR SWITCH...................................................................................................13
3.2.1 Checking the door switch........................................................................................................... 13
3.3. PRESSURE SWITCH..........................................................................................14
3.3.1 Pressure Switch Working Principles – Alarm Connection ......................................................... 14
3.3.2 Pressure Switch Working Principles – Pump Down .................................................................. 15
3.3.3 Pressure Switch Factory Setting................................................................................................ 15
3.4. DOOR FRAME HEATER.....................................................................................15
3.4.1 Heater cable features................................................................................................................. 16
3.5. MAIN BOARD – STANDARD CONTROLLER.....................................................16
3.5.1 Checking Relay Outputs............................................................................................................ 16
3.6. KEYPAD – STANDARD CONTROLLER.............................................................18
3.6.1 Keypad Troubleshooting............................................................................................................ 18
3.7. MAIN BOARD – TOUCH SCREEN CONTROLLER............................................18
3.7.1 Checking Relay Outputs............................................................................................................ 19
3.8. DISPLAY – TOUCH SCREEN VERSION............................................................22
3.8.1 Touch Screen Display Troubleshooting..................................................................................... 22
3.9. REFRIGERANT PRESSURES CHECKS............................................................23
4 SERVICE AND REPAIR......................................................................................................................... 24
4.1 REMOVE THE FRONT PANEL...........................................................................24
4.1.1. Units from 5 to 18 shelves...................................................................................24
4.1.2 GBF-GN2/3 (smallest self-contained unit)................................................................................. 25
4.1.3 Latest version of self-contained (5 to 18 pans) Effective June 2014.............................. 26
4.2. REVERSING THE DOOR SWING (ONLY NON TOUCH SCREEN)...................27
4.3. ACCESSING THE CONDENSING UNIT.............................................................32
4.3.1 Unit from 5 to 18 shelves ........................................................................................................... 32
4.3.2 5 shelves units ........................................................................................................................... 37

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4.3.3 GBF-3GN2/3 (smallest self-contained unit)............................................................................... 38
4.3.4 Remote units, units GBF20GN2/1, GBF40GN2/1,GBF20GN1/1 .............................................. 39
4.4. HOW TO ACCESS EVAPORATOR ASSEMBLY................................................39
4.4.1 Evaporator Assembly Description.............................................................................................. 39
4.4.2 Accessing the Evaporator.......................................................................................................... 41
4.4.3 Replacing the Temperature Sensing Probes............................................................................. 41
4.5. REPLACING THE EVAPORATOR FAN..............................................................44
4.6. REPLACING THE DOOR SWITCH.....................................................................44
4.6.1 GBF-3GN2/3 (smallest self-contained unit)............................................................................... 44
4.6.2 Units from 5 up to 18 shelves ................................................................................................... 44
4.7 REPLACING THE PRESSURE SWITCH............................................................45
4.8 REPLACING THE DOOR FRAME HEATER.......................................................46
4.9 REPLACING THE RELAY BOARD.....................................................................47
4.10 REPLACING THE KEYPAD................................................................................48
5 VACUUM AND CHARGE PROCEDURE............................................................................................... 49
5.1 VACUUM AND CHARGING INSTRUCTION.......................................................49
5.1.1 Self Contained Models............................................................................................................... 49
5.1.2 Remote Models.......................................................................................................................... 50
5.1.3 Vacuum and Charging Recommendations................................................................................ 50
6 SCHEMATICS ........................................................................................................................................ 51
6.1 SCHEME OF COMPONENTS.............................................................................51
6.2 AIRFLOW REQUIREMENTS ..............................................................................52
6.2.1 Self Contained - Airflow Requirements................................................................52
6.2.2 Remote - Airflow Requirements...........................................................................53
6.3 CONNECTION OF REMOTE CABINET TO “NON-DESMON” CONDENSING
UNIT 55
6.3.1 Connection with existing refrigerant lines............................................................55
6.3.2 Hook the electrical power to the unit....................................................................56
I. HOW TO READ THE MODEL NUMBER............................................................................................... 58
II. DATA CHART TABLE ........................................................................................................................... 59

Blast chiller Service Manual
9 Rev 07/04/2015
1. Basic Service Diagnostic (Standard Controller)
The Controller will display alarms and failure codes that will assist in identifying
the cause of a problem and direct attention to the components and circuits
involved. In addition, a diagnostic service menu allows technicians to quickly
check the temperature sensors, such as the needle probe, the chamber probe or
the evaporator probe.

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1.1. ALARM/FAILURE LIST
Tab 1
CODE
CAUSE
CONSEQUENCE
Er0 ROOM PROBE FAILURE Does not allow unit to cycle. If running,
cycle will stop.
Er1 EVAPORATOR PROBE FAILURE During storage cycle, evaporator fans
do not run.
Er3 NEEDLE PROBE FAILURE Does not allow a needle probe set
temperature cycle to run. Unit will stop
if running on needle probe set
temperature cycle.
HP HIGH DISCHARGE PRESSURE (OR
LOW SUCTION PRESSURE)
1
Unit will not operate in any cycle. If running, compressor, evaporator and
condenser fans will stop.
d-r DOOR IS OPEN FOR MORE THAN
P39 Compressor and condenser fan will stop. Evaporator fan will cycle
according to P37
AH HIGHT ROOM TEMPERATURE None
AL LOW ROOM TEMPERATURE None
Err MOTHER BOARD-KEYBOARD
CONNECTION FAILURE
2
None
Res POWER FAILURE DURING
RUNNING OF CYCLE Cycle will restart when power is restored. Message will flash to
indicate cycle has restarted.
1
The pressure switch in this model series provides a single output, open or closed. The
circuit is normally open and will close when either the High or Low Pressure limits are
reached. In effect, the failure code, HP, could mean either high discharge pressure as well
as low suction pressure.
2
Additional troubleshooting at the Key Pad – Control Module connections:
No Ground connection – Display flashes and/or dims
No Negative (-) connection – Display may work normally without failure code
No Positive (+) connection – Failure Code Error is displayed
No 12V connection – Display will not light up.

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1.2.
FAILURE CODE DETAILS
The HACCP feature provides the ability to get additional information such as
failure code, date of occurrence, min/max temperature (if applicable), and
duration of alarm condition.
To access previous failure codes, press and hold
the PROGRAM key for 5 seconds.
Use the UP and DOWN arrow keys to scroll
PROGRAM key to exit.
1.3.
SERVICE MENU
1.3.1 Entering the
configurat
The service menu can be accessed only during OFF mode.
Press the up/down keys
together
for 5 seconds to enter the menu.
controller doesn’t need actually any password to
the up arrow key the parameter list can be accessed directly
the parameter by pressing Up/do
Change the value by up/down keys. Pr
1.3.2 Parameter l
ist
The following table shows parameter factory settings for both Blast
and Shock Freezers (GBF).
NOTE:
Selecting a freezing cycle on a GBC unit
(Cabinet at 0°C, needle probe end cycle temperature at 3°C)
Blast ch
FAILURE CODE DETAILS
The HACCP feature provides the ability to get additional information such as
failure code, date of occurrence, min/max temperature (if applicable), and
To access previous failure codes, press and hold
the PROGRAM key for 5 seconds.
Use the UP and DOWN arrow keys to scroll
through the previous failure codes. Press the
SERVICE MENU
– CONFIGURATION
PARAMETER
configurat
ion parameter
The service menu can be accessed only during OFF mode.
for 5 seconds to enter the menu.
Label PA (password)
will be shown as first
controller doesn’t need actually any password to
configure the parameters. By pressing
the up arrow key the parameter list can be accessed directly
(first parameter is P0).
the parameter by pressing Up/do
wn keys. Select a
parameter by pressing
Change the value by up/down keys. Pr
ess again time key
to save and go back to the list.
ist
(factory setting)
The following table shows parameter factory settings for both Blast
Selecting a freezing cycle on a GBC unit
will run a normal chilling cycle
(Cabinet at 0°C, needle probe end cycle temperature at 3°C)
Blast ch
iller Service Manual
The HACCP feature provides the ability to get additional information such as
failure code, date of occurrence, min/max temperature (if applicable), and
To access previous failure codes, press and hold
through the previous failure codes. Press the
PARAMETER
will be shown as first
. The
configure the parameters. By pressing
(first parameter is P0).
Scroll
parameter by pressing
the time key
to save and go back to the list.
The following table shows parameter factory settings for both Blast
chillers units (GBC)
will run a normal chilling cycle

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GBF-3GN2/3 and all GBF Trolley Units (Cycle Off Defrost)
Parameter
Description
Factory Value
P0 unit of temperature measurement
0 = °F
1 = °C
1
P1 cabinet probe offset 0
P2 evaporator probe offset 0
P3 needle probe offset 0
P4 operational setpoint during the second hard chill step; also,
operational setpoint during normal chilling (with reference to
the cabinet probe)
0
P5 operational setpoint during freezing (with reference to the
cabinet probe) -40
P6 operational setpoint during the first hard chill step (with
reference to the cabinet probe) -20
P7 operational setpoint during post-chill storage (with reference to
the cabinet probe) 3
P8 operational setpoint during post-freeze storage (with reference
to the cabinet probe) -20
P9 P4, P5, P6, P7 and P8 differential 1
P10 set temperature chill end temperature (with reference to the
needle probe) 3
P11 set temperature freeze end temperature (with reference to the
needle probe) -18
P12 temperature at which the hard chill switches from the first step
to the second (with reference to the needle probe) 20
P13 temperature above which it is not possible to start a set-
temperature operational cycle (with reference to the needle
probe)
99
P14 needle probe and the cabinet temperature for verification of
correct needle probe insertion
0 = the test will not be performed
0
P15 duration of the second test to check correct needle probe
insertion; see also P14 60
P16 maximum set temperature chill duration; also timed chill
duration 90
P17 maximum set temperature freeze duration; also timed freeze
duration 240
P18 first hard timed chill step duration 45
P19 compressor delay from device power on (from restoration of
power) 0
P20 minimum elapsed time period between two consecutive
compressor start-up operations 0
P21 minimum compressor shut-down time 0

Blast chiller Service Manual
13 Rev 07/04/2015
Parameter
Description
Factory Value
P22 defrost type
0 = electric (defrost on relay)
1 = hot gas (defrost compressor and relay on)
2 = air (evaporator fan on)
2
P23 defrost end temperature (with reference to the evaporator
probe) 8
P24 maximum defrost duration 10
P25 defrost interval during storage; see also P26
0 = intermittent defrosting will never be activated (only the first
will be activated)
6
P26 first defrost delay from start of storage; see also P25 1
P27 defrosting at start of chilling and freezing
1 = YES 0
P28 drip-drain duration 2
P29 resetting of compressor protections at start of defrosting (only
if P22 = 1)
1 = YES
0
P30 elapsed time between the defrost request and switching on the
compressor (only if P22 = 1 and providing that the compressor
is off when the defrost is requested); see P31 (7) (8)also
30
P31 elapsed time between the defrost request and activation of the
solenoid valve (only if P22 = 1 and on condition that the
compressor is off when defrosting is requested); see also P30
0
P32 temperature above which the evaporator fan is switched off
during storage (with reference to the evaporator probe) 3
P33 P32 differential 1
P34 evaporator fan activity during defrosting (only if P22 = 0 or 1)
0 = on
1 = off
0
P35 evaporator stop time after dripping 3
P36 temperature above which the evaporator fan is switched off
(with reference to the cabinet probe) 90
P37 effect caused by activation of microport input on evaporator
fan
0 = no effect
1 = the evaporator fan will be switched off
1
P38 microport input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
1
P39 micro port input alarm delay 0
P40 high pressure input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
0
P41 high pressure input alarm delay 120

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Parameter
Description
Factory Value
P42 low pressure input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
0
P43 low pressure input alarm delay 0
P44 compressor thermal protection input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
0
P45 compressor thermal protection input alarm delay 0
P46 UV light on duration (duration of cabinet sterilisation) 5
P47 needle probe heating end temperature (with reference to the
needle probe) 45
P48 maximum duration of needle probe heating 15
P49 the temperature, below which the door elements are switched
on (with reference to the cabinet probe) 5
P50 P49 differential 2
P51 condenser fan activity in the absence of the condenser probe
(P61 = 0)
0 = in parallel with compressor
1 = on
1
P52 the temperature below which the condenser fan is switched off
in the presence of the condenser probe (P61 = 1) and on
condition that the compressor is on (with reference to the
condenser probe); see also P54
20
P53 P52 differential 5
P54 condenser fan switch off delay on switching off the compressor
in the presence of the condenser probe (P61 = 1); see also
P52
30
P55 chill and freeze cycle completion buzzer duration 3
P56 maximum buzzer duration during an alarm state 15
P57 elapsed time between switching on the compressor and pump
down valve activation (pump down in power up); also elapsed
time between deactivation of the pump down valve and
switching off the compressor (pump down in power down)
10
P58 defrost parameter units of measurement
0 = P25 h, P24, P26, P28 and P35 min
1 = P25 min, P24, P26, P28 and P35 s
0
P59 reserved 0
P60 probe type
0 = NTC
1 = PTC
0
P61 condenser probe enabling
1 = YES 0
P62 the temperature above which the condenser temperature
alarm is activated (with reference to the condenser probe) 70
P63 P62 differential 10

Blast chiller Service Manual
15 Rev 07/04/2015
Parameter
Description
Factory Value
P64 temperature below which the minimum temperature alarm is
activated during post-chill storage, with relation to P7, i.e. "P7
+ P64" (with reference to the cabinet probe)
0 = no alarm
0
P65 temperature above which the maximum temperature alarm is
activated during post-chill storage, with relation to P7, i.e. "P7
+ P65" (with reference to the cabinet probe)
0 = no alarm
0
P66 temperature below which the minimum temperature alarm is
activated during post-freezing storage, with relation to P8, i.e.
"P8 + P66" (with reference to the cabinet probe)0 = no alarm
0
P67 temperature above which the maximum temperature alarm is
activated during post-freezing storage, with relation to P8, i.e.
"P8 + P67" (with reference to the cabinet probe)
0 = no alarm
0
P68 P64, P65, P66 and P67 differential 2
P69 storage operation start-up temperature alarm delay 0
P70 temperature alarm delay 0
P71 enable printing
1 = YES 0
P72 print interval 5
P73 HACCP alarm list deletion
1 = YES 0
P74 Baudrate
0=2400
1=4800
2=9600
3=19200
2
P75 Bit polarity
0=no polarity
1=even
2=odd
2
P76 Board address 1

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All GBF units from 5 to 18 Shelves (Hot gas Defrost)
Parameter
Description
Factory Value
P0 unit of temperature measurement
0 = °F
1 = °C
1
P1 cabinet probe offset 2
P2 evaporator probe offset 0
P3 needle probe offset 0
P4 operational setpoint during the second hard chill step; also,
operational setpoint during normal chilling (with reference to
the cabinet probe)
0
P5 operational setpoint during freezing (with reference to the
cabinet probe) -40
P6 operational setpoint during the first hard chill step (with
reference to the cabinet probe) -20
P7 operational setpoint during post-chill storage (with reference to
the cabinet probe) 3
P8 operational setpoint during post-freeze storage (with reference
to the cabinet probe) -20
P9 P4, P5, P6, P7 and P8 differential 1
P10 set temperature chill end temperature (with reference to the
needle probe) 3
P11 set temperature freeze end temperature (with reference to the
needle probe) -18
P12 temperature at which the hard chill switches from the first step
to the second (with reference to the needle probe) 20
P13 temperature above which it is not possible to start a set-
temperature operational cycle (with reference to the needle
probe)
99
P14 needle probe and the cabinet temperature for verification of
correct needle probe insertion
0 = the test will not be performed
0
P15 duration of the second test to check correct needle probe
insertion; see also P14 60
P16 maximum set temperature chill duration; also timed chill
duration 90
P17 maximum set temperature freeze duration; also timed freeze
duration 240
P18 first hard timed chill step duration 45
P19 compressor delay from device power on (from restoration of
power) 0
P20 minimum elapsed time period between two consecutive
compressor start-up operations 0
P21 minimum compressor shut-down time 0

Blast chiller Service Manual
17 Rev 07/04/2015
Parameter
Description
Factory Value
P22 defrost type
0 = electric (defrost on relay)
1 = hot gas (defrost compressor and relay on)
2 = air (evaporator fan on)
1
P23 defrost end temperature (with reference to the evaporator
probe) 8
P24 maximum defrost duration 10
P25 defrost interval during storage; see also P26
0 = intermittent defrosting will never be activated (only the first
will be activated)
6
P26 first defrost delay from start of storage; see also P25 1
P27 defrosting at start of chilling and freezing
1 = YES 0
P28 drip-drain duration 2
P29 resetting of compressor protections at start of defrosting (only
if P22 = 1)
1 = YES
0
P30 elapsed time between the defrost request and switching on the
compressor (only if P22 = 1 and providing that the compressor
is off when the defrost is requested); see P31 (7) (8)also
30
P31 elapsed time between the defrost request and activation of the
solenoid valve (only if P22 = 1 and on condition that the
compressor is off when defrosting is requested); see also P30
0
P32 temperature above which the evaporator fan is switched off
during storage (with reference to the evaporator probe) 3
P33 P32 differential 1
P34 evaporator fan activity during defrosting (only if P22 = 0 or 1)
0 = on
1 = off
0
P35 evaporator stop time after dripping 3
P36 temperature above which the evaporator fan is switched off
(with reference to the cabinet probe) 90
P37 effect caused by activation of microport input on evaporator
fan
0 = no effect
1 = the evaporator fan will be switched off
1
P38 microport input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
1
P39 micro port input alarm delay 0
P40 high pressure input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
1
P41 high pressure input alarm delay 120

Rev 07/04/2015 18
Parameter
Description
Factory Value
P42 low pressure input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
0
P43 low pressure input alarm delay 0
P44 compressor thermal protection input contact type
0 = NA (input active with contact closed)
1 = NC (input active with contact open)
0
P45 compressor thermal protection input alarm delay 0
P46 UV light on duration (duration of cabinet sterilisation) 5
P47 needle probe heating end temperature (with reference to the
needle probe) 45
P48 maximum duration of needle probe heating 15
P49 the temperature, below which the door elements are switched
on (with reference to the cabinet probe) 5
P50 P49 differential 2
P51 condenser fan activity in the absence of the condenser probe
(P61 = 0)
0 = in parallel with compressor
1 = on
1
P52 the temperature below which the condenser fan is switched off
in the presence of the condenser probe (P61 = 1) and on
condition that the compressor is on (with reference to the
condenser probe); see also P54
20
P53 P52 differential 5
P54 condenser fan switch off delay on switching off the compressor
in the presence of the condenser probe (P61 = 1); see also
P52
30
P55 chill and freeze cycle completion buzzer duration 3
P56 maximum buzzer duration during an alarm state 15
P57 elapsed time between switching on the compressor and pump
down valve activation (pump down in power up); also elapsed
time between deactivation of the pump down valve and
switching off the compressor (pump down in power down)
10
P58 defrost parameter units of measurement
0 = P25 h, P24, P26, P28 and P35 min
1 = P25 min, P24, P26, P28 and P35 s
0
P59 reserved 0
P60 probe type
0 = NTC
1 = PTC
0
P61 condenser probe enabling
1 = YES 0
P62 the temperature above which the condenser temperature
alarm is activated (with reference to the condenser probe) 70
P63 P62 differential 10

Blast chiller Service Manual
19 Rev 07/04/2015
Parameter
Description
Factory Value
P64 temperature below which the minimum temperature alarm is
activated during post-chill storage, with relation to P7, i.e. "P7
+ P64" (with reference to the cabinet probe)
0 = no alarm
0
P65 temperature above which the maximum temperature alarm is
activated during post-chill storage, with relation to P7, i.e. "P7
+ P65" (with reference to the cabinet probe)
0 = no alarm
0
P66 temperature below which the minimum temperature alarm is
activated during post-freezing storage, with relation to P8, i.e.
"P8 + P66" (with reference to the cabinet probe)
0 = no alarm
0
P67 temperature above which the maximum temperature alarm is
activated during post-freezing storage, with relation to P8, i.e.
"P8 + P67" (with reference to the cabinet probe)
0 = no alarm
0
P68 P64, P65, P66 and P67 differential 2
P69 storage operation start-up temperature alarm delay 0
P70 temperature alarm delay 0
P71 enable printing
1 = YES 0
P72 print interval 5
P73 HACCP alarm list deletion
1 = YES 0
P74 Baudrate
0=2400
1=4800
2=9600
3=19200
2
P75 Bit polarity
0=no polarity
1=even
2=odd
2
P76 Board address 1

Rev 07/04/2015 20
All GBC units from 5 to 18 Shelves (Hot gas Defrost)
Parameter
Description
Factory Value
P0 unit of temperature measurement
0 = °F
1 = °C
1
P1 cabinet probe offset 2
P2 evaporator probe offset 0
P3 needle probe offset 0
P4 operational setpoint during the second hard chill step; also,
operational setpoint during normal chilling (with reference to
the cabinet probe)
0
P5 operational setpoint during freezing (with reference to the
cabinet probe) 0
P6 operational setpoint during the first hard chill step (with
reference to the cabinet probe) -20
P7 operational setpoint during post-chill storage (with reference to
the cabinet probe) 3
P8 operational setpoint during post-freeze storage (with reference
to the cabinet probe) 3
P9 P4, P5, P6, P7 and P8 differential 1
P10 set temperature chill end temperature (with reference to the
needle probe) 3
P11 set temperature freeze end temperature (with reference to the
needle probe) 3
P12 temperature at which the hard chill switches from the first step
to the second (with reference to the needle probe) 20
P13 temperature above which it is not possible to start a set-
temperature operational cycle (with reference to the needle
probe)
99
P14 needle probe and the cabinet temperature for verification of
correct needle probe insertion
0 = the test will not be performed
0
P15 duration of the second test to check correct needle probe
insertion; see also P14 60
P16 maximum set temperature chill duration; also timed chill
duration 90
P17 maximum set temperature freeze duration; also timed freeze
duration 90
P18 first hard timed chill step duration 45
P19 compressor delay from device power on (from restoration of
power) 0
P20 minimum elapsed time period between two consecutive
compressor start-up operations 0
P21 minimum compressor shut-down time 0