Follett Precision series REF4P, REF4P, REF5P, FZR4P, FZR5P-T Installation, Operation And Service Manual
...Page 1
REF4P and REF5P Precision™ series
REUC235
Undercounter Refrigerators
Installation, Operation and Service Manual
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
REF4P REF5P
Following installation, please forward this manual
totheappropriate operations person.
Order parts online:
www.follettice.com
010 41755 R 00
Page 2
Contents
REUC235
Welcome to Follett......................................................................................................................................................3
Before you Begin ................................................................................................................................................... 3
Specications .............................................................................................................................................................3
Electrical Specications ......................................................................................................................................... 3
Refrigeration Specications ...................................................................................................................................3
Installation Specications ......................................................................................................................................3
Installation ..................................................................................................................................................................4
Installing Levelers ..................................................................................................................................................4
Installing Shelves ...................................................................................................................................................4
Installing Drawer ....................................................................................................................................................4
Reversing the Door Swing – Optional ...................................................................................................................4
Installing Glycerine Solution in Product Simulation Bottle .....................................................................................7
Operation ....................................................................................................................................................................7
Temperature Control ..............................................................................................................................................7
Defrosting...............................................................................................................................................................7
Controller Operation - Precision ...............................................................................................................................8
Controller Display...................................................................................................................................................8
Controller Security .................................................................................................................................................8
Changing Temperature Display from C to F ..........................................................................................................8
Sleep Function .......................................................................................................................................................8
Temp Log ............................................................................................................................................................... 9
Alarming Functions ................................................................................................................................................9
Follett Keypad Lock ............................................................................................................................................. 11
Cleaning ....................................................................................................................................................................12
Annual Cleaning ..................................................................................................................................................12
Service .......................................................................................................................................................................13
Door Gasket Replacement ..................................................................................................................................13
Slide-out Compressor Tray ..................................................................................................................................13
Removing Drawers .............................................................................................................................................. 13
Removing Slides ..................................................................................................................................................13
Controller Replacement .......................................................................................................................................14
Wiring Diagram .................................................................................................................................................... 14
Refrigeration System ........................................................................................................................................... 15
Checking Refrigeration System Pressures ..........................................................................................................15
Compressor Information .........................................................................................................................................16
Troubleshooting .......................................................................................................................................................16
Before calling for service .....................................................................................................................................16
Accessory Installation .......................................................................................................................................... 17
Temperature Surveillance Module Accessory (P/N 00168674) ........................................................................... 17
Pedestal Base (P/N 01059112) ............................................................................................................................ 17
Stacking Kit (P/N 00926618) ............................................................................................................................... 17
Temperature Alarm Accessory (P/N 00112185) ................................................................................................... 17
Universal ADC Bracket (P/N 01059096) .............................................................................................................. 17
Digtal Data Logger (P/N 01057561) ....................................................................................................................17
Replacement Parts ...................................................................................................................................................18
Evaporator ...........................................................................................................................................................18
Condensing Unit ..................................................................................................................................................19
Hardware .............................................................................................................................................................21
Hardware and Electrical Components .................................................................................................................22
2 REF4P and REF5P Undercounter Refrigerators
Page 3
Welcome to Follett
REUC235
Follett equipment enjoys a well-deserved reputation for excellent performance, long-term reliability and
outstanding after-the-sale support. To ensure that this product delivers that same degree of service, we ask that
you take a moment to review this manual before beginning the installation. Should you have any questions or
require technical help at any point, please call our technical service group at (877) 612-5086 or (610) 252-7301.
Before you Begin
After uncrating and removing all packing material, inspect the equipment for concealed shipping damage. If
damage is found, notify the shipper immediately and contact Follett Corporation so that we can help in the ling of
a claim, if necessary.
Check your paperwork to determine which item number you have. Follett item numbers are designed to provide
information about the type of refrigerator you are receiving. Following is an explanation of the different item
numbers.
Model Number Item Number Keypad
REF4P-00-00 X X
REF4P
REF5P
REF4P-00-GD X X
REF4P-KP- 00 X X X
REF4P-KP-GD X X X
REF5P-00-00 X X
REF5P-00-GD X X
REF5P-KP-00 X X X
REF5P-KP-GD X X X
Specications
REF4P 31.38" (79.7 cm) H x 23.75" (60.3 cm) W x
REF5P 34.00" height (86.4 cm) H x 23.75" (60.3 cm) W x
Electrical Specications
115 V, 60 Hz, 1 phase
Full load: 4.1A
Minimum circuit ampacity: 15A
Maximum size of branch circuit overcurrent device: 15A
27"(68.5 cm) D
27"(68.5 cm) D
Door
Solid Glass
Fits below 34" (86.4 cm) high ADAcompatible counter
Fits below standard 36" (91.4 cm)
high counter
Stackable/Use with
Pedestal
3.9 cu ft capacity
4.5 cu ft capacity
Refrigeration Specications
Installation Specications
Ambient temperature must not exceed 100 F (38 C).
The front louvered panel must be kept free of any cabinet trim or obstructions to ensure proper ventilation of the
refrigeration system.
REF4P and REF5P Undercounter Refrigerators 3
Maximum Design Pressures (psi)
Refrigerant Charge Size (oz)
R134A 9 190 110
CAUTION !
High Side Low Side
§ Equipment must be wired according to local and national electrical codes.
§ Always disconnect power before servicing refrigerator.
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Installation
REUC235
Installing Levelers
1. Remove levelers from plastic bag packed inside refrigerator
(Fig.1).
2. Tip refrigerator back and screw levelers in all the way to stop
(they will extend 1/8" below base of REF).
3. Adjust levelers as needed to level REF in both directions. To
access levelers, remove the lower front panel. Turn levelers
clockwise to extend levelers.
Note: If you are using this in a food service application and installing in
accordance with NSF, you must seal the unit to the oor once it is
set in place. Place a 1/8" bead of NSF-approved silicone sealant
(not provided) around the base of the unit.
Installing Shelves
1. Remove shelves packed as an accessory (Fig. 2).
2. Place top notch of shelf bracket into pilaster, then bottom notch.
Fig. 1
Fig. 2
Installing Drawer
1. Remove drawer packed as an accessory (Fig. 3).
2. Install the two rollers to the threaded holes on each side of the
inside of the cabinet.
3. Hang one drawer slide on the each side of the cabinet by
holding the slide parallel to the bottom of the cabinet, tipping the
slide at a 45 degree angle, and pushing the slide over the two
rollers.
4. Once the drawer slides are installed, slide the two rear rollers of
the drawer into the slots on the top of the lower channel of the
slides. Tip up the front of the drawer and slide the back until the
front drawer roller lines up to slot. Drop the front drawer roller
into the channel and push the drawer all the way in the cabinet.
5. Test operation of the drawer by sliding the drawer all the way
out, then back in.
Reversing the Door Swing – Optional
Tools needed:
§ #2 Phillips head screwdriver
§ Flat-head screwdriver
§ Awl
§ Gloves
§ Safety glasses
1. Remove kick panel* (Fig. 4). Disconnect the door sensor switch
wires and grey control wire.
* If the unit has a keypad lock, the door must be open to remove the kick panel.
2. Remove wire and strain relief from kick plate (Fig. 4).
Fig. 3
Fig. 4
4 REF4P and REF5P Undercounter Refrigerators
Page 5
3. Remove the screw from the white strap on the hinge side of the
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wire channel (Fig. 5). Remove the control wire from the channel
at the bottom door cap. The wire should be left hanging in the
center of the door.
4. Use at screwdriver to carefully remove hinge covers (Fig. 6). Fig. 6
Fig. 5
5. Rotate top of spring assembly (clockwise for left-hands doors
and counter-clockwise for right-hand doors) (Fig.7.1) to remove
the pin (Fig.7.2).
6. Relieve torque on the spring.
7. Remove the knockout on the kick panel and move the strain
relief to the opposite side.
8. With at-head screwdriver, simultaneously push down and pry
the top of the spring out of the top of the hinge (Fig. 8).
Fig. 7
1
2
Fig. 8
REF4P and REF5P Undercounter Refrigerators 5
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9. Remove screws and latch from refrigerator cabinet and the lock
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from the door (Fig. 9).
Fig. 9
10. Support door and remove screws attaching hinge to refrigerator
cabinet and remove the door (Fig. 10).
11. Cover hinge screw holes with screws removed from
opposite side of door and door frame.
12. Remove the hinges from the door and remove the screws from
the opposite side of the door. Install those screws in the screw
holes where the hinges were removed.
13. Reinstall hinges on opposite side of door.
14. Reinstall the hinges onto the cabinet but keep the mounting
screws loose.
15. Adjust the hinges on the door by pushing the loose hinges
towards the gasket-side of the door until the hinge is stopped by
the screws. Tighten the screws.
16. Reinstall the door on the opposite side of the doorframe. Adjust
if needed.
17. Reposition lock to other side of door (Fig. 11).
18. Reinstall latch screws torqued to 25 in-lbs.
19. Reinstall screws on the door.
Fig. 10
Fig . 11
6 REF4P and REF5P Undercounter Refrigerators
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Installing Glycerine Solution in Product Simulation Bottle
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1. Remove the bottle from the bracket located in the upper left side
of the refrigerator (Fig. 12).
2. Remove the top and ll the bottle with a 50/50 solution of glycerine
and water.
3. Replace the top (and probe).
4. Reinsert bottle into the bracket.
Note: If you are using this in a food service application, and installing in
accordance with NSF, you must remove the probe from the bottle.
NSF requires that air temperature be displayed.
Fig. 12
Operation
The temperature control board and probe indicate when the refrigeration system is required to turn on and off.
The refrigeration system removes heat from the cabinet interior and rejects it to the surrounding room air.
When the cabinet interior temperature rises above the controller cut-in temperature, the controller turns the
refrigeration system on. The controller energizes the evaporator fan and solid-state control relay which energizes
the condensing unit. The compressor uses a current-style starting relay and a starting capacitor to start the
compressor motor.
When the cabinet interior temperature falls below the controller cut-out temperature, the controller turns the
refrigeration system off. The controller contacts reopen, which de-energizes the evaporator fan motor and solidstate control relay which de-energizes the condensing unit (compressor and condenser fan motor).
Any accumulated frost on the evaporator coils melts during the off cycle. The condensate drains out of the unit
to the condensate tray to the left of the condensing unit. The heat from the condensing unit evaporates any
condensate in the drain pan.
Temperature Control
The temperature control system is preset by the factory to maintain a cabinet temperature of 38– 42F
(3.3–5.5C). If desired, the set-point temperature can be raised as high as 50F (10C) by following the
instructions in Controller Operation on page 8 for changing the temperature set point. The 3F differential will be
maintained regardless of the controller set point.
Defrosting
Precision series undercounter refrigerators do not require manual defrosting. The unit cooler defrosts
automatically when the condensing unit is in the OFF cycle and during an off time defrost every 8 hours. The
defrost will terminate when the evaporator temperature reaches 38 F (3.3 C) or after 30 minutes.
REF4P and REF5P Undercounter Refrigerators 7
Page 8
Controller Operation - Precision
REUC235
In normal operation, the controller displays product temperature in degrees F (default) or user-selected
degreesC. F temperatures are displayed to the nearest degree and C temperatures are displayed to one decimal
point.
The controller is pre-programmed with a 40F (4.4C) set point. COMP displays when the compressor is running.
If this set point does not meet your specic application needs, instructions for changing the set point are found
below.
Note: Follett presets its refrigeration system to hold product temperature at approximately 40F (4.4C). If you are
using this in a food service application, and installing in accordance with NSF, you must set the control
set-point to 38 F (3.3 C). This will deliver a product temperature below the 40 F (4.4 C) NSF requirement.
Controller Display
The controller display will show the product/bottle temperature in degrees C or degrees F as selected by the user
except when the unit is in an alarm.
The controller has system indicators above the temperature display to let you know when: the compressor is
energized (COMP), the evaporator fan is energized (FAN) or the unit is in defrost (DEF).
To display temperature Set-point
Step Input Display
1 Press and release SET Current set-point temperature will display for approximately 5 seconds.
To change temperature Set-point
Step Input Display
1 Press and hold SET for 3 seconds Set-point will ash.
2 Press UP or DOWN arrows to desired
set-point
3 Press and release SET to accept Product temperature will display.
Display will return to current product temperature.
New temperature set-point will ash on the display.
Controller Security
The controller can be locked so that the set-points in the controller cannot be changed.
1. To lock, press UP and DOWN arrows simultaneously until LOC appears (approximately 5 s).
2. To unlock the controller, press up and down arrows simultaneously until UNL appears. Changes are only
accepted when the controller is unlocked.
Changing Temperature Display from C to F
1. Press SET and UP arrow simultaneously until L1 is displayed.
2. Press the UP arrow until UNT is displayed. Press SET then use the UP and DOWN arrows to change
the temperature display from F to C. Press SET to accept. The display will return to the temperature in
approximately 10 s.
Sleep Function
Press the SLEEP button to blank the display, or press any button to wake the display. If the unit goes into an
alarm, the display will wake to display the alarm.
8 REF4P and REF5P Undercounter Refrigerators
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Temp Log
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High and low log display
1. Press the UP arrow to display the highest temperature the refrigerator has recorded since last reset or
power cycle.
2. Press the DOWN arrow to display the lowest temperature that the refrigerator has recorded since last
reset or power cycle.
Reset high and low log
1. Press UP or DOWN arrow until recorded temperature is displayed.
2. Press and hold SET until RST is displayed.
Alarming Functions
Set high and low alarms
1. Press and hold SET and UP arrows simultaneously until L1 is displayed. Use the UP and DOWN arrows
to navigate parameters.
2. The low temperature alarm parameter is AlL. Once the parameter is displayed, press SET to display the
low alarm temperature. The alarm temperature will ash on the display. Use the UP and DOWN arrows
to set the alarm temperature. Press SET to accept.
3. The high temperature alarm parameter is AlH. Once the parameter is displayed, press SET to display
the high alarm temperature. The alarm temperature will ash on the display. Use the UP and DOWN
arrows to set the alarm temperature. Press SET to accept.
Mute the Alarms
The mute button is used to temporarily mute the audible alarm for 10 minutes. If the alarm condition of the unit
has not changed in 10 minutes, then the alarm will sound again.
Alarm Reset
The alarm will reset after the cause of the alarm condition has been resolved.
Alarming Contacts
This unit is equipped with dry contacts that may be connected to a 3rd party monitoring system. The contacts are
located on the back of the unit. Standard Precision units utilize the Alarm 1 set (top 3). Each set of dry contacts
has a Common, a Normally Open and a Normally Closed connection point. By default, Alarm Relay 1 is set to
activate with any of the following alarms: Alarm 1 High temp, Alarm 1 Low temp, System errors or probe error.
Alarm Codes
When the unit senses an alarm, the display will ash the following codes.
Value Description
HA1 Temperature is above the High Alarm#1 set point.
LA1 Temperature is below the low Alarm #1 set point.
HA2 Temperature is above the High Alarm #2 set point.
LA2 Temperature is below the Low Alarm #2 set point.
SFS Suction line temperature probe fell below the suction failsafe temp of 5 F (-15 C).
DFS Discharge line temperature probe rose above the discharge failsafe temp of 250 F (121 C).
Error Codes
Value Description
P1-P8 Controller is not sensing the probe.
F9 Error saving new parameter values to permanent storage.
F10 Incomplete model conguration.
F21 Key shorted on user interface.
F22 Communication error with user interface.
F23 Communication error with Machine Control.
REF4P and REF5P Undercounter Refrigerators 9
Page 10
Advanced Settings
REUC235
The refrigerator can be further customized through the rst level (L1) and second level parameters (L2) in the
chart below.
1. Press and hold SET and UP arrows simultaneously until L1 is displayed.
2. Use the UP and DOWN arrows to navigate the parameters. When the desired parameter is displayed,
press SET.
3. Use the UP and DOWN arrows to navigate the sub menu of the parameter. Press SET to accept and
the display will return to the parameter list (after 30 seconds the display will return to the temperature
display).
Parameter Display Description
Beeper Function bPr Controls the audible beeper function on the controller. Off, All, door, Alarm,
Error.
Beeper Volume bPu Sets the volume of the beeper: 0 (minimum) to 10 (maximum).
Button Clicks btc Sets if a beep should sound each time a button is pressed. Yes or No.
Sleep Function SLP Determines if sleep function activated from the panel. Yes or No.
Sleep Timer SLt Amount of time before the screen blanks automatically. 0 s to 600 s.
Alarm1 High Temp A1H High temperature to activate alarm1. User set point to 250 F.
Alarm1 Low Temp A1L Low temperature to activate alarm1. User set point to -50 F.
Alarm1 Probe A1P Probe for Alarm. P1 (cabinet air), P2 (evaporator), P3 (simulation bottle), P4 (not
used), P5 (not used), P6 (evaporator line), P7 (discharge line), P8 (not used).
Units unt Display temperatures in degrees C or F. F or C.
1. Press and hold SET and UP arrows simultaneously until L1 is displayed.
2. Press and hold SET and UP arrows simultaneously again until L2 is displayed.
3. Use the UP and DOWN arrows to navigate the parameters. When the desired parameter is displayed,
press SET.
4. Use the UP and DOWN arrows to navigate the sub menu of the parameter. Press SET to accept and
the display will return to the parameter list (after 30 seconds the display will return to the temperature
display).
Parameter Display Description
Alarm1 Delay A1d Alarm1 delay before sounding. 0 to 60 minutes
Alarm1 Function A1F Denes the action taken when Alarm2 is activated. NO (normally open), NC
(normally closed), R1 (activate relay), R2 (not used), DIS (disable).
Alarm1 Reset A2r Temperature difference to reset alarm1. 0 to 10 degrees.
Alarm2 Delay A2d Alarm1 delay before sounding. 0 to 60 minutes.
Alarm2 Function A2F Denes the action taken when Alarm2 is activated. NO (normally open), NC
(normally closed), R1 (activate relay), R2 (not used), DIS (disable).
Alarm2 Reset A2r Temperature difference to reset alarm1. 0 to 10 degrees.
Alarm Ring back Arb Denes the time delay until the alarm will resound. 0 to 120 minutes
Alarm Startup Delay ASd Denes the alarm delay during startup. 0 to 180 minutes.
Alarm Silencing ASL Determines if the alarms can be silenced or not. Yes, No.
Maintain Alarm nAL Determines if the alarm (1-3) should be maintained if the temperatures fall
back into range. Yes, No.
Probe 1 Calibration P1C Offset value for probe 1 calibration. -9.9 to 9.9.
Probe 2 Calibration P2C Offset value for probe 2 calibration. -9.9 to 9.9.
Probe 3 Calibration P3C Offset value for probe 3 calibration. -9.9 to 9.9.
Controller Parameter
Reset
rSt Reset to restore factory parameters.
10 REF4P and REF5P Undercounter Refrigerators
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Follett Keypad Lock
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Default user passcode for rst-time users
User Code 01 is factory set by default to 1 2 3 4 5 6.
User Codes 01 to 40 do not have any codes set up and are available for user-programming.
Each time a button is pressed, a chirp will be heard.
To Change the Master Code
The master code is needed to add or change the individual user codes. By default, the master code is set to
1 2 3 4 5 6.
The master code is stored in User ID # 99.
1. Press 3 6 5, the *, followed by the current Master Code, followed by ENTER (5 Chirps will be heard).
2. Press 9 9, followed by ENTER. (3 chirps will be heard).
3. Enter the new master code, followed by ENTER (3 chirps will be heard).
4. Re-enter the new master code, followed by ENTER. (5 chirps will be heard).
– Pressing [CANCEL] at any point will cancel the routine.
To Enter or Change a User Code
1. Press 3 6 5, the *, followed by the Master Code, followed by ENTER. 5 Chirps will be heard.
2. Enter the user ID (a two digit code from 00 to 40), followed by ENTER. 3 chirps will be heard.
3. Enter the new user code (4 to 6 numbers), followed by ENTER. 3 chirps will be heard.
4. Re-Enter the new User Code, Followed by ENTER. 5 chirps will be heard to acknowledge that a new
code was entered.
Example: To enter a new user code of 4 4 3 3 5 5 for ID # 15
1. Press 3 6 5 * 1 2 3 4 5 6 [ENTER] (5 chirps will be heard).
2. Press 1 5 [ENTER] (3 chirps will be heard).
3. Press 4 4 3 3 5 5 [ENTER] (3 chirps will be heard).
4. Press 4 4 3 3 5 5 [ENTER] (5 chirps will be heard).
The new code has been entered for the ID.
To Delete a User Code
1. Press 3 6 5, the *, followed by the Master Code, followed by ENTER. 5 Chirps will be heard.
2. Enter the user ID to clear, followed by ENTER (3 chirps will be heard).
3. Press 3 3 5, # (3 chirps are heard) (335 = DEL).
4. Enter the user ID to clear, followed by ENTER (2 chirps will be heard).
5. Press 3 3 5, # (5 chirps are heard).
The code assigned to that user ID has been deleted. If an error is encountered, the control will beep
continuously for 3 seconds. The Master Code stored in user ID 99 cannot be deleted.
Example: To delete the user code in ID 15:
1. Press 3 6 5 # 1 2 3 4 5 6 [ENTER] (5 chirps will be heard).
2. Press 1 5 [ENTER] (3 Chirps will be heard).
3. Press 3 3 5, # (3 Chirps will be heard) (335 = DEL).
4. Press 1 5 [ENTER] (2 Chirps will be heard).
5. Press 3 3 5, # (5 Chirps will be heard).
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Cleaning
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Interior: Using a sponge or soft cloth, clean unit with a non-abrasive, non-chlorinated, all-purpose detergent.
Exterior: Wipe exterior with a soft cloth in the direction of grain as needed. Stainless steel polish may be used to
enhance the nish of the unit.
Annual Cleaning
Removal of dust and other particulates from air intake areas and the
condenser is important for proper operation. Environments with large
amounts of dust may require more frequent cleaning.
Use only non-chlorine-based cleaners. Cleaners containing
chlorine can cause staining and pitting of the stainless steel.
1. Disconnect power to unit by turning switch on the lower front
panel to the OFF position and removing power cord from
receptacle.
2. Remove lower front and rear panels (Fig. 13.1).
Note: Front louvered panel may be removed for more frequent cleaning
of the condenser as needed.
3. Remove drain pan (Fig. 13.2). (REF4P, REF5P drain pan
location shown.)
4. Clean drain pan with a non-abrasive, non-chlorinated allpurpose detergent.
5. Reinstall drain pan.
6. Use a vacuum cleaner with brush attachment to clean
condenser through lower front panel and compressor motor and
related parts through lower rear panel.
7. Reinstall lower rear and lower front panels.
Fig. 13
2
1
12 REF4P and REF5P Undercounter Refrigerators
Page 13
Service
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Door Gasket Replacement
1. Remove existing gasket from mounting track.
2. Verify mounting track is free of any remaining gasket material.
3. Align new gasket with mounting track and press rmly in place.
4. Open and close door, checking for proper gasket seal without
pinching against refrigerator.
5. Adjust latch and or striker as necessary for proper door closure.
Slide-out Compressor Tray
Follett’s slide-out compressor tray allows technicians to partially slide the
condensing unit from the freezer back without cutting refrigerant lines.
1. Remove rear panel (Fig. 14.1).
2. Remove two bolts securing condensing unit to unit base
(Fig.14.2).
3. Carefully slide out condensing unit (Fig. 14.3).
Note: Do not put strain on the refrigerant lines.
Removing Drawers
1. Pull drawer forward to stop (Fig. 15.1).
2. Lift drawer front to free front rollers from sides (Fig. 15.2).
3. Still lifted, pull drawer forward to free back rollers from sides
(Fig. 15.3).
Fig. 14
Fig. 15
3
2
3
2
1
1
Removing Slides
1. Push slides all the way back.
2. Swing bottom of slide away from refrigerator wall and lift slide off
of rollers.
REF4P and REF5P Undercounter Refrigerators 13
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Controller Replacement
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Wiring Diagram
WHT
HTR
HTR
PAN
DEF
SW
SFTY
SW
PAN
RED
SFTY
COIL
WHT
COMP
N
COND
C
BLK
DOOR SW.
ENHANCED
BATTERY
EVA P
FAN
BLK
BLU
BRN
VIO
WHT
WHT ORG
WHT
WHT
BLK
WHT
BLU
WHT
FAN
BLK
DOOR
HTR
120VAC
DISPLAY
DOOR
SW
BATTERY
NEUTRAL (L2)
WHT
BLK
HOT (L1)
BLK
RED
BLK
RED
BLK
RESET
EVAP FAN
BLU
FZR SERIES ONLY
DEF RLY
3-32VDC
INPUT
43
COMP RLY
3-32VDC
INPUT
43
MACHINE CONTROL
RELAY
DEF
COMP
RELAY
COND FAN
DOOR HTR
BRN
VIO
PWR SW
BLK
240VAC/25A
OUTPUT
21
RED
BLK
240VAC/25A
OUTPUT
21
ORG
P1-CAB
P2-DFST
P3-BOTL
P6-SUCT
P7-DSCHG
R30
P8
COND AIR
INLET
P7
COMP
SUCTDSCHG
P6
P3
ALARM
BOTL
P2 P1
DFRST
CAB
BLK
RED
BLK
RED
ALARM#1
BLK
ALARM 1
LOCK
BLK
BRN
ENHANCED ONLY
BRN
BLU
120VAC
12V TRANSFORMER
12VDC
RED
BLK
BLK
RED
BLK RED
LIGHT
LED
14 REF4P and REF5P Undercounter Refrigerators
ENHANCED
CONTROL
ALARM 2
RED
RED
N.C.
ALARM 2
1A/30VDC
COM
N.O.
N.C.
ALARM 1
1A/30VDC
COM
N.O.
REAR PANEL CONNECTIONS
Page 15
Refrigeration System
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The Precision series refrigeration system is designed to give many years of trouble-free service. Except for
routine cleaning of the air-cooled condenser and related parts, the refrigeration system requires no service or
maintenance. The system uses a capillary tube and is critically charged. Access ttings are provided for ease
of service. However, the connection of refrigeration service hoses to the ttings will almost invariably result in a
signicant change in the system charge. This change can adversely affect the performance of your refrigerator.
Therefore, Follett recommends that if hoses are ever connected to the refrigeration system for service, the
refrigerant should be recovered, the system evacuated, and recharged by weighing in the correct refrigerant
charge.
Checking Refrigeration System Pressures
1. Remove the rear access panel.
2. Turn the power switch to the ON position.
3. Verify that the temperature controller is set to the original factory cut-in setting.
4. Allow the refrigerator to operate and stabilize at least 30 minutes, verifying the cut-out temperature is
being reached.
5. If the compressor doesn't cycle after 20 minutes, the following checks must be completed before
checking refrigeration pressures:
§ condenser coil is clean and clear
§ condenser fan is running
§ evaporator coil is clean and clear
§ evaporator fan motor is running
§ compressor is running at normal amp draw
6. Connect refrigerant hoses to access ttings and measure air temperature at condenser intake grille.
7. Verify correct pressures with the temperature chart below.
8. Troubleshoot refrigeration system as needed.
REF4P, REF5P
Condenser inlet air temperature 70 F (21.1 C) 80 F (26.7 C) 90 F (32.2 C) 100 F (37.8 C)
Discharge pressure (psi) 113 134 158 181
Suction pressure (psi) 11. 5 13 15 17
Note: Do not attempt to obtain correct refrigeration pressures by adjusting the system charge.
Refrigeration System Diagram
CAPILLARY TUBE
LOW SIDE
SERVICE PORT
COMPRESSOR
EVAPORATOR
CONDENSER
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
REF4P and REF5P Undercounter Refrigerators 15
FILTER-DRIER
HIGH SIDE
SERVICE PORT
LOW PRESSURE VAPOR
Page 16
Compressor Information
REUC235
Danfoss model NF6.1F X. 2
Run load amps (RLA) 3.2
Lock rotor amps (LRA) 22.2
Ohms start winding to common 3.1
Ohms run winding to common 2.0
Ohms start winding to run winding 5.1
Troubleshooting
Before calling for service
1. Check that unit is plugged in.
2. Test outlet with another appliance to verify power.
Symptom Possible Cause Solution
Refrigerator does not operate (no
components run).
Compressor does not run. Thermal overload open or defective. Allow to cool or replace.
Evaporator fan motor does not run. Defective fan motor. Replace fan motor.
Refrigerator does not shut off. Controller not sensing cut-off temperature. Replace controller and/or probe.
Refrigerator does not maintain
temperature (all components run).
If problems persist after following this basic troubleshooting guide, call Follett’s technical service group at
Power switch faulty or in OFF position; loose
connection.
Refrigerator not plugged in. Connect plug.
No power to cord. Restore power.
Temp controller not energizing components. Check controller contact terminals for
Probe not sensing set point temperature. Replace controller and/or probe.
Capacitor and/or relay defective. Replace as required.
Compressor defective. Replace compressor.
Controller keeping refrigeration system
energized.
Control relay faulty. Replace control relay.
Condenser or evaporator coil needs cleaning. Clean coils.
Faulty door gasket. Replace door gasket.
Excessively high ambient or inadequate air
clearance.
Refrigerant leak. Locate and repair leak.
Incorrect refrigerant charge. Recover, evaluate and weigh in correct
Plugged capillary tube. Replace capillary tube and lter drier.
Inefficient compressor. Consult technical services.
Turn power switch to ON; check switch
and connections.
power. Replace controller if needed.
Replace controller.
Maximum recommended ambient is
100F (38F).
charge.
(877) 612-5086.
16 REF4P and REF5P Undercounter Refrigerators
Page 17
Accessory Installation
REUC235
The following instruction sheets are available in the download section of the Follett website (www.follettice.com).
Temperature Surveillance Module Accessory (P/N 00168674)
§ Reference instruction 00168609 (packed with module)
Pedestal Base (P/N 01059112)
§ Reference instruction 01062488 (packed with base)
Stacking Kit (P/N 00926618)
§ Reference instruction 00192526 (packed with stacking kit)
Temperature Alarm Accessory (P/N 00112185)
§ Reference instruction 00112052 (packed with temperature alarm accessory)
Universal ADC Bracket (P/N 01059096)
§ Reference instruction 01062470 (packed with bracket)
Digital Data Logger (P/N 01057561)
§ Reference instruction 01057579 (packed with digital data logger)
REF4P and REF5P Undercounter Refrigerators 17
Page 18
Replacement Parts
REUC235
1
2
Evaporator
Reference # Description Part #
1
2
2
3
Not shown
4
4
4
3
Evaporator REF fan motor with hardware 01053 818
Evaporator cover REF4P/FZR4P 01049915
Evaporator cover REF5P/FZR5P 01049881
Condensate pan 01012061
Thermal break cover REFP/FZRP (set of 6) 01053925
Shelf support REF4P/FZR4P 01062785
Shelf support REF5P/FZR5P 01062793
18 REF4P and REF5P Undercounter Refrigerators
Page 19
Condensing Unit
REUC235
Reference # Description Part #
1
2
3
4
5
Not shown
4
3
2
1
Compressor, NF7CLX 01062389
Condensing unit 01035104
Condenser fan motor 01062363
Condenser fan blade 01062371
Filter drier cap tube 010340799
Compressor start components 01053 842
5
REF4P and REF5P Undercounter Refrigerators 19
Page 20
13
REUC235
10
5
1
4
2
3
11
12
7
8
9
6
20 REF4P and REF5P Undercounter Refrigerators
Page 21
Hardware
REUC235
Reference # Description Part #
1 Façade, basic controller with hardware 01053586
Not shown Façade, basic controller with key pad & hardware 0105 3594
Not shown Façade mounting bracket 01062702
2 Hinge top, with spring assembly & hardware 0105 3677
3 Hinge bottom 00940478
Not shown Hinge kit, top & bottom with hardware 0105 3685
4 Door gasket REF5P 01015924
4 Door gasket REF4P 01037258
5 Lock with key, spacer & hardware 0105 3693
6 Kick panel with strain relief & hardware 01053701
7 Spring bolt with bracket, latch & hardware 01053719
8 Spring bolt 01037571
9 Power switch 00967604
Not shown Bottom door cap with magnet 0105 3735
10 Door REF4P (without bottom cap or façade) 0105 3768
10 Door REF5P (without bottom cap or façade) 0105 3750
11 Bottle bracket with cap & gasket 0105 3792
Not shown Leveler 00128900
Not shown Shelf 01025444
Not shown Drawer with hardware 0105 380 0
12 Alarm terminal block 01017508
13 Power cord 00995605
Not shown Drawer kit 01053644
Not shown Shelf kit 01025444
Not shown Caster 01053636
Not shown Glycerol 00959296
Not shown Replacement key 01059112
Not shown Seismic bracket 01059104
REF4P and REF5P Undercounter Refrigerators 21
Page 22
Hardware and Electrical Components
REUC235
Reference # Description Part #
Not shown Main control board 01062934
Not shown Main control board with keypad 01062959
Not shown Keypad driver board 0103 4735
Not shown Compressor/defrost relay 01053867
Not shown Temperature probe 0105 3883
Not shown Refrigeration schrader valve caps 206230
Not shown Complete control module Precision (control board, relays & mounting plate) 01053891
Temperature Surveillance Module (Chart Recorder) Related Items
Reference # Description Part #
Not shown Bracket, bottle, 125 mL 0 0 17113 2
Not shown Gasket, bottle, 125 mL 00171124
Not shown Bottle, with cap, 125 mL (gasket not included) 00171116
Not shown Battery 00112 177
Not shown Chart paper, 6" 7-day, 7 day (qty 60) 0016209 9
Not shown Pens, replacement (qty 6) 00162081
Not shown Probe, chart recorder 00162073
Digital Data Logger Related Items
Reference # Description Part #
Not shown Temperature probe certicate of traceability Calibration by Dickson (NIST)
and ISO/IEC 17025
Not shown DicksonWare software and USB cable 01057603
Not shown AC power adapter 010 57611
Not shown 60 ml product simulation bottle 00112 037
Not shown Velcro, hook and loop fastener 206406
Not shown Glycerol 00959296
01057595
22 REF4P and REF5P Undercounter Refrigerators
Page 23
REF4P and REF5P Undercounter Refrigerators 23
REUC235
Page 24
Follett is a registered trademark of Follett Corporation, registered in US.
REUC235
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
010 41755 R 00
© Follet Corporation 3/14
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