GENERAL COMPONENT LOCATION:
CONTROLLER LOCATION AND
MAIN POWER SWITCH (COVER REMOVED)
COMPRESSOR
CONDENSER
FILTER
DRIER
FAN
TXV
LOCATION
POWER J-BOX
EVAPORATOR
ASSEMBLY
EVAPORATOR
FAN REMOVED
FOR REPLACEMENT.
REMOVE PLATE
AND BRACKET
FOR FAN MOTOR
REPLACEMENT.
TROUBLESHOOTING AND SERVICE GUIDE:
The following is intended as a quick service guide designed to diagnose most common problems. It is
intended to be used only as a guideline. Should the unit require actual replacement of components those
must be done by a trained and licensed refrigeration professional. While the unit is within the factory
warranty period, all repairs require prior factory authorization before the work is actually performed.
UNIT NOT COOLING:
•
POWER TO THE UNIT: Is there power to the unit?. Is the voltage within ± 10% of 115 VAC? Low
power conditions affect the amperage draw of the compressor, requiring more amperes on start up. If
the amperage draw is too high, the compressor safety relay could trip leading to component premature failure. if the compressor is tripping on it’s safety relay on startups, the unit will not refrigerate as
required.
•
COMPRESSOR NOT RUNNING: Is the compressor not running when the controller calls for cooling
to begin?. (see point above). Verify that power to the compressor is correct and the starter and safety
relays are working properly.
•
CONDENSR FAN NOT RUNNING: Is the compressor running but not the condenser fan? The condenser fan is on the same circuit as the compressor. They both operate at the same time. Verify that
the condenser fan receives power and the fan blades rotate freely. Verify if there is debris in the
blades that prevents it from starting (ie: leaves, paper, grass clippings, etc…)
•
VENTILATION IN THE UNIT: Does the unit have enough ventilation on the back to allow for free cool
air to reach the condenser? Many installations have no outside ventilation reaching the condenser as
they place the unit into a closed space that only re-circulates air discharged from the condenser
“back” to the condenser reducing performance drastically. Verify that there is an outside source for
fresh air into the condenser.
NOT HOLDING TEMPERATURE CORRECTLY:
•
CONTROL SET POINT: Is the unit operating with the correct set point? Please verify according to
the list provided in the controller programming on the following chapter of this booklet.
•
OPERATING DIFFERENTIAL: The unit operates in a 3 degree differential on average depending on
the quantity of items in the unit. The unit will cycle ON and OFF several times so the product temperature is an average of the cycle. (see section “Understanding the refrigeration cycle”)
•
DEFROST MODE: Is the unit currently in defrost mode?. The unit defrosts until the coil temperature
reaches 50°F. This is not the temperature of the product, this is just the air temperature during defrost.
•
EVAPORATOR COIL ICED UP: Is the evaporator coil iced up due to incorrect (too low) of a set
point? Verify that the unit defrosts properly and the evaporator coil is clean of heavy frosting during
operation.
NOISY OPERATION:
•
DEBRIS IN THE BAN BLADE: Is there debris in the condenser fan blade? Not only can debris physically stop the fan blade from rotating (as discussed previously), but is can also block airflow thus preventing the unit for cooling. As the air get hotter in the unit from lack of airflow, the condenser fan will
increase speed to allow more airflow.
•
FULLY STOCKED: Is the unit fully stocked? If the unit is not properly stocked or half empty the unit
will have to work harder. Air does not hold temperature, products do. If there is not product in the refrigerator the unit will turn ON and OFF several times per hour. If the unit is fully stocked, the run-time
will be extended but also the off-time allowing the compressor to cool down properly between cycles.
This will help the unit run more efficiently as several runs per hour will increase compressor temperatures thus requiring to work harder to cool down.
•
TUBING RUBBING: Are there any tubes in the compressor area rubbing against each other? Is there
any rubbing between the tubing and the condenser fan housing or fan motor itself? The installation of
components at the back of the unit requires to have components closed together. During shipment
and installation some of these components might shift rubbing each other. Please verify there are no
lines rubbing or too close together as to touch when operating.
CONTROLLER SETTINGS AND ADJUSTING TEMPERATURES :
Your ALFRESCO refrigerator features an exclusive digital programmable thermostat (see figure 1) that
controls all functions of the unit. The operating temperature of the unit is user-adjustable from 25°F to
45°F.
The refrigeration control has been preset at the factory for normal, everyday operation under standard
room conditions. Should you require to change the temperature setting, higher or lower than the standard factory set of 35°F, this procedure can be done very quickly, as follows:
1.
2.
3.
4.
Press the “SET ” button for 1 second to display the set point temperature (35°F) default.
Hold the “SET ” key until the set point starts flashing.
Use the c
key to increase the temperature or d key decrease the temperature.
Press the “SET ” button once more to confirm the value. The display will stop flashing.
Note:
The c “UP” and d “DOWN” keys also serves as indicator lights to show when the
compressor is ON or when the unit is on DEFROST mode.
UP KEY
(Compressor ON
Status Light) see note
See
Note
SET POINT KEY
(Alarm indicator)
see note
DOWN KEY
(Defrost Status Light)
Figure 1
Figure 2
ADJUSTMENTS ITEMS TO REMEMBER:
►
►
►
►
►
►
FOR NORMAL OPERATION SET THE UNIT TO 35°F.
PLEASE NOTE THAT THIS IS NOT THE INTERNAL REFRIGERATOR CABINET TEMPERATURE.
DO NOT CHANGE THE TEMPERATURE SETTING MORE THAN 3°F AT A TIME.
ALLOW 24 HOURS FOR THE REFRIGERATOR TO REACH A NEW TEMPERATURE SETTING.
THE MOTOR WILL START AND STOP OFTEN. THIS IS NORMAL OPERATION.
KEEP YOUR REFRIGERATOR LEVELED.
NOTE: Depending on the controller revision model, it will either have indicator lights on the buttons
themselves (see figure 2) or (newer models) will have indicator symbols on the left side of the display. If
so, these 3 status symbols will indicate the following:
Shows when the compressor is ON
Shows that there is an ALARM
Shows the unit is on DEFROST
OPERATIONAL PARAMETERS
There are two sets of parameters that can be access on this controller. Some require a password,
other do not.
1. Press the “SET ” button for 1 second to display the set point temperature (35°F) default.
2. Hold the “SET ” key for at least 5 seconds once more (the set point starts flashing and after
5
seconds the letters PS will appear on the screen). PS = PASSWORD
3. Release the “SET ” key.
4. At this point, press the “SET ” once more and use the c
or d
keys to reach the number 22
on the screen (this is your password).
5. Press the “SET ” key once more to return the display to “PS”.
6. Use the c
or d
keys to cycle through the different programming parameters.
7. ALWAYS Press the “SET ” button for at lest 5 seconds to exit the programming mode.
Review:
MENU ITEM:
(example:
PS)
PROGRAM:
PRESS
“SET ” KEY
CHANGE
ITEM:
c d KEYS
CONFIRM:
PRESS
“SET ” KEY
MENU ITEM:
(example:
PS)
Please verify all programmed operational variables according to the list on the following page.
The ARFG-42 unit should now operate with peak efficiency.
◄ Values to be changed from default
Sporlan™ OMNI-Stat® Controller Settings
Model: 952892 - 120 VAC
Code:
Parameter:
Value
Default
UOM
22
22
#
0
4
0
4
°F
~
0
1
0
0
~
~
3
25
45
0
2
-50
60
0
°F
°F
°F
~
r4
Automatic variation of set point - NOT USED
COMPRESSOR PARAMETERS
Delay compressor after power on
c0
3
3
~
0
0
Minutes
Minimum time between 2 compressor runs
c1
Compressor shut down minimum time
c2
Compressor Operation minimum time
c3
Compressor
Safety (0=OFF / 100=ON)
c4
Continuous Cycle Duration
cc
Alarm Delay after continuous cycle
c6
DEFROST PARAMETERS
Defrost type (0=heater / 1=Hot Gas / 2=timed
heater / 3=timed HG)
d0
Defrost interval
dI
Defrost Ends Temperature
dt
Max. Defrost Duration
dP
Defrost after power on (0= NO / 1= YES)
d4
Defrost delay after power on
d5
0
2
0
100
4
2
0
0
0
0
4
2
Minutes
Minutes
Minutes
~
Hours
Hours
2
4
50
30
0
0
3
8
4
30
0
0
~
Hours
°F
Minutes
~
Minutes
1
2
1
1
2
1
~
Minutes
Hours
0
~
0
~
~
~
0
0
~
0
0
0
0
0
0
0
0
0
0
°F
°F
°F
Minutes
Minutes
1
1
~
1
1
~
1
0
~
1
0
~
~
~
~
PASSWORD
Password
PS
PROBE PARAMETERS
/c
Ambient probe calibration
/2
Measurement Stability
/4
Probe to display (0=ambient / 1=product)
/5
Unit of Measure (0=°C / 1= °F)
REGULATION PARAMETERS
Regulating Differential
rd
Minimum Allowed Temperature setting
r1
Maximum Allowed Temperature setting
r2
Enable Def. alarm when max def. time reached
r3
d6
dd
d8
d9
d/
Block Display during Defrost (0= NO / 1= YES)
Dripping time after defrost
Alarm delay after defrost
Defrost priority over minimum compressor time
(0= NO / 1= YES)
Defrost probe - display temperature
Time base for dI and dP (0= hrs / 1= minutes)
dc
ALARM PARAMETERS
Alarm and Fans Differential Temp
A0
Low temperature alarm (0= OFF)
AL
Hight temperature alarm (0=OFF)
AH
Alarm Temperature delay
Ad
Alarm imput detection delay
A7
OTHER PARAMETERS
Serial Address (communications)
H0
Alarm Relay Operation (0=Alarm w/relay ON 1=Alarm w/ relay OFF)
H1
H2
H5
T
0= Disable Buttons / 1=Enable Buttons
Identification for Programming
External Programming
Access
W/O PS
With PS
UNDERSTANDING THE REFRIGERATION CYCLE:
The Refrigeration Controller unit that manages all the refrigerator operations and performance is a rugged and highly
sophisticated commercial grade Sporlan Electronic Controller.
Like all refrigerators, as the unit cools and maintains the desired product temperature, it’s internal temperature will fluctuate between ON and OFF periods depending upon ambient temperature, how many times the door is open and for how
long it’s held open.
To minimize ON (running) times and save energy, it is recommended to open the door for the smallest amount of time
and frequency.
The ARFG-42 unit is factory preset with a set point of 35°F and with a 3°F differential cycle.
This means that the ARFG-42 unit will refrigerate until it reaches 35°F internal air temperature. At that point, the unit will
turn OFF and will remain off until it reaches 38°F (Due to the 3°F differential temperature cycle).
It is important to understand that your product will not actually reach 38°F.
The “average” product temperature will settle somewhere midway between the ON and OFF set points (approximately ~
37°F) depending on the product type.
Please refer to the following graph for a representation of the refrigeration cycle:
The 3°F differential is used to provide you with the best possible energy savings. A smaller differential would cause the
unit to start and stop several times per hour wasting energy.
The Electronic Temperature Controller in the ARFG-42 allows the user to change and adjust the default set point (35°F)
between 25°F and 45°F, consequently the product temperature will average lower or higher temperatures as desired.
Please refer to “CONTROLLER SETTINGS”
Always remember:
When the door is opened on the ARFG-42, the display will read the cabinet temperature at that very moment. That is not
your product temperature.
ARFG-42 SERVICE PARTS LISTING:
The following is a list of all components and or hardware that are serviceable on the ARFG-42 refrigerator unit. Please refer to the picture and attached text for reference and identification.
ELECTRICAL COMPONENTS:
CONDENSER FAN
210-0105
EVAPORATOR FAN
210-0265
LIGHT SWITCH
210-0298
MAIN POWER SWITCH
210-0021
LIGHT BULB (COATED)
210-0245
MAIN POWER
CORD
210-0287
LIGHT SOCKET
210-0314
TEMPERATURE
CONTROLLER KIT
210-0030
TEMPERATURE CONTROL
SENSOR
210-0031
4 POSITION
TERMINAL BLOCK
210-0301
6 POSITION
TERMINAL BLOCK
210-0302
REFRIGERATION COMPONENTS:
REFRIGERANT
COMPRESSOR
260-0055
EVAPORATOR
COIL
250-0057
CONDENSER
COIL
250-0061
THERMAL EXPANSION
VALVE
220-0004
REFRIGERANT TXV
ORIFICE
220-0009
FILTER
DRIER
220-0029
HARDWARE COMPONENTS:
DRAWER GASKET
290-0164
DOOR HINGE
REPLACEMENT
KIT
290-0155
DOOR GASKET
290-0165
CONDENSER FAN
FINGER GUARD AND
MOTOR MOUNT
210-0253
EVAPORATOR COIL
FINGER GUARD
200-0182
(Hardware components—Cont.)
CONDENSER
FAN BLADE
210-0250
EVAPORATOR
FAN BLADE
210-0315
FOOD PAN
1/2 SIZE x 6” D
290-0130
HOW TO OBTAIN ADDITIONAL HELP AND SERVICE:
For warranty, service, contact your local Alfresco Gourmet authorized service agency. Provide us
with the Model #, Serial #, date of installation, and a brief description of the problem.
While the unit is within the factory warranty period, all repairs require prior factory authorization before
the work is actually performed.
Please contact:
Alfresco Gourmet Grills
Customer Service Department
7039 East Slauson Avenue
Commerce, CA 90040.
Customer Service/Parts Phone:
Fax:
(888) 383-8800 or (323) 722-7900
(323) 726-4700.