Follett REF4P Setup guide

01041755cvr
REF4P REF5P
Order parts online:
www.follettice.com
01041755R00
801 Church Lane • Easton, PA 18040, USA
Toll free [phone] • [phone]
www.follettice.com
Installation, Operation and Service Manual
REF4P and REF5P Precision™ series
Undercounter Refrigerators
Following installation, please forward this manual
totheappropriate operations person.
REUC235

2 REF4P and REF5P Undercounter Refrigerators
Contents
Welcome to Follett......................................................................................................................................................3
Before you Begin ...................................................................................................................................................3
Specications.............................................................................................................................................................3
Electrical Specications.........................................................................................................................................3
Refrigeration Specications...................................................................................................................................3
Installation Specications ......................................................................................................................................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
REUC235

Welcome to Follett
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 [phone] or [phone].
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 Door Stackable/Use with
Pedestal
Solid Glass
REF4P
REF4P-00-00 X X
REF4P-00-GD X X
REF4P-KP-00 X X X
REF4P-KP-GD X X X
REF5P
REF5P-00-00 X X
REF5P-00-GD X X
REF5P-KP-00 X X X
REF5P-KP-GD X X X
Specications
REF4P 31.38" (79.7 cm) H x 23.75" (60.3 cm) W x
27"(68.5 cm) D
Fits below 34" (86.4 cm) high ADA-
compatible counter
3.9 cu ft capacity
REF5P 34.00" height (86.4 cm) H x 23.75" (60.3 cm) W x
27"(68.5 cm) D
Fits below standard 36" (91.4 cm)
high counter
4.5 cu ft capacity
Electrical Specications
115 V, 60 Hz, 1 phase
Full load: 4.1A
Minimum circuit ampacity: 15A
Maximum size of branch circuit overcurrent device: 15A
Refrigeration Specications
Refrigerant Charge Size (oz)
Maximum Design Pressures (psi)
High Side Low Side
R134A 9190 110
Installation Specications
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.
CAUTION!
§Equipment must be wired according to local and national electrical codes.
§Always disconnect power before servicing refrigerator.
REF4P and REF5P Undercounter Refrigerators 3
REUC235

Installation
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.
Fig. 1
0104175504a
Installing Shelves
1. Remove shelves packed as an accessory (Fig. 2).
2. Place top notch of shelf bracket into pilaster, then bottom notch.
Fig. 2
0104175504b
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.
Fig. 3
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. 4
4 REF4P and REF5P Undercounter Refrigerators
REUC235

3. Remove the screw from the white strap on the hinge side of the
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.
Fig. 5
4. Use at screwdriver to carefully remove hinge covers (Fig. 6).Fig. 6
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.
Fig. 7
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. 8
1
2
REF4P and REF5P Undercounter Refrigerators 5
REUC235

9. Remove screws and latch from refrigerator cabinet and the lock
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.
Fig. 10
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. 11
6 REF4P and REF5P Undercounter Refrigerators
REUC235

Installing Glycerine Solution in Product Simulation Bottle
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 solid-
state 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– 42F
(3.3–5.5C). If desired, the set-point temperature can be raised as high as 50F (10C) by following the
instructions in Controller Operation on page 8 for changing the temperature set point. The 3F 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
REUC235

Controller Operation - Precision
In normal operation, the controller displays product temperature in degrees F (default) or user-selected
degreesC. F temperatures are displayed to the nearest degree and C temperatures are displayed to one decimal
point.
The controller is pre-programmed with a 40F (4.4C) set point. COMP displays when the compressor is running.
If this set point does not meet your specic application needs, instructions for changing the set point are found
below.
Note: Follett presets its refrigeration system to hold product temperature at approximately 40F (4.4C). 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
1Press and release SET Current set-point temperature will display for approximately 5 seconds.
Display will return to current product temperature.
To change temperature Set-point
Step Input Display
1Press and hold SET for 3 seconds Set-point will ash.
2Press UP or DOWN arrows to desired
set-point
New temperature set-point will ash on the display.
3Press and release SET to accept Product temperature will 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
REUC235

Temp Log
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 conguration.
F21 Key shorted on user interface.
F22 Communication error with user interface.
F23 Communication error with Machine Control.
REF4P and REF5P Undercounter Refrigerators 9
REUC235

Advanced Settings
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. 0s 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. For 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. 0to 60 minutes
Alarm1 Function A1F Denes 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. 0to 10 degrees.
Alarm2 Delay A2d Alarm1 delay before sounding. 0to 60 minutes.
Alarm2 Function A2F Denes 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. 0to 10 degrees.
Alarm Ring back Arb Denes the time delay until the alarm will resound. 0to 120 minutes
Alarm Startup Delay ASd Denes the alarm delay during startup. 0to 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
REUC235

REF4P and REF5P Undercounter Refrigerators 11
Follett Keypad Lock
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 15[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 15[ENTER] (3 Chirps will be heard).
3. Press 3 3 5, # (3 Chirps will be heard) (335 = DEL).
4. Press 15[ENTER] (2 Chirps will be heard).
5. Press 3 3 5, # (5 Chirps will be heard).
REUC235

Cleaning
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 all-
purpose 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
0104175509
2
1
12 REF4P and REF5P Undercounter Refrigerators
REUC235

Service
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.
Fig. 14
0104175510
2
1
3
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. 15
2
1
3
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
REUC235

Controller Replacement
Wiring Diagram
N
CBLK
WHT
WHT
WHT
BRN
BLK
BLU
VIO
BRN
EVAP
FAN
COND
FAN DOOR
HTR
DEF
HTR
PAN
HTR
SFTY SW SFTY
SW COMP
PWR SW
DEF RLY
COMP RLY
ALARM#1
DEF
DFRST
ALARM
BOTL
SUCTDSCHG
COMP
INLET
EVAP FAN
COND FAN DOOR HTR
RESET
CAB
COND AIR
P7 P3 P2 P1
P6
P8
R30
21
43 INPUT
3-32VDC
240VAC/25A
OUTPUT 21
43 INPUT
3-32VDC
240VAC/25A
OUTPUT
120VAC
BLK
BLK
BLK
ORG
RED
RED
BLK
RED
BLK
BLU
VIO
BRN
BLK
WHT
RED
WHT
WHT
WHT ORG
FZR SERIES ONLY
MACHINE CONTROL
BLK
RED
RED
BLK
ALARM 1
DISPLAY
PAN
COIL
BLK
BLK
BLU
WHT
BLK
BLK
WHT
120VAC
12VDC
LED
LIGHT
ALARM 2
LOCK
12V TRANSFORMER
BRN
BLU
RED
BLK
RED
BLK
BLK RED
RED RED
P1-CAB P2-DFST P3-BOTL P6-SUCT P7-DSCHG
DOOR SW.
BATTERY
ENHANCED ONLY
ENHANCED
ENHANCED
CONTROL
HOT (L1)
NEUTRAL (L2)
RELAY
COMP
RELAY
DOOR
SW BATTERY
COM
N.O.
N.C.
COM
N.O.
N.C.
ALARM 1
REAR PANEL CONNECTIONS
1A/30VDC
ALARM 2
1A/30VDC
14 REF4P and REF5P Undercounter Refrigerators
REUC235

Refrigeration System
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
signicant 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
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
HIGH SIDE
SERVICE PORT
LOW SIDE
SERVICE PORT
FILTER-DRIER
COMPRESSOR
EVAPORATOR
CAPILLARY TUBE
CONDENSER
REF4P and REF5P Undercounter Refrigerators 15
REUC235

16 REF4P and REF5P Undercounter Refrigerators
Compressor Information
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).
Power switch faulty or in OFF position; loose
connection.
Turn power switch to ON; check switch
and connections.
Refrigerator not plugged in. Connect plug.
No power to cord. Restore power.
Temp controller not energizing components. Check controller contact terminals for
power. Replace controller if needed.
Probe not sensing set point temperature. Replace controller and/or probe.
Compressor does not run. Thermal overload open or defective. Allow to cool or replace.
Capacitor and/or relay defective. Replace as required.
Compressor defective. Replace compressor.
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.
Controller keeping refrigeration system
energized.
Replace controller.
Control relay faulty. Replace control relay.
Refrigerator does not maintain
temperature (all components run).
Condenser or evaporator coil needs cleaning. Clean coils.
Faulty door gasket. Replace door gasket.
Excessively high ambient or inadequate air
clearance.
Maximum recommended ambient is
100F (38F).
Refrigerant leak. Locate and repair leak.
Incorrect refrigerant charge. Recover, evaluate and weigh in correct
charge.
Plugged capillary tube. Replace capillary tube and lter drier.
Inefficient compressor. Consult technical services.
If problems persist after following this basic troubleshooting guide, call Follett’s technical service group at
[phone].
REUC235

REF4P and REF5P Undercounter Refrigerators 17
Accessory Installation
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)
REUC235

18 REF4P and REF5P Undercounter Refrigerators
Replacement Parts
1
2
43
Evaporator
Reference # Description Part #
1Evaporator REF fan motor with hardware 01053818
2Evaporator cover REF4P/FZR4P 01049915
2Evaporator cover REF5P/FZR5P 01049881
3Condensate pan 01012061
Not shown Thermal break cover REFP/FZRP (set of 6) 01053925
4Shelf support REF4P/FZR4P 01062785
4Shelf support REF5P/FZR5P 01062793
REUC235

REF4P and REF5P Undercounter Refrigerators 19
0104175516
41
3
2
5
Condensing Unit
Reference # Description Part #
1Compressor, NF7CLX 01062389
2Condensing unit 01035104
3Condenser fan motor 01062363
4Condenser fan blade 01062371
5Filter drier cap tube 010340799
Not shown Compressor start components 01053842
REUC235

20 REF4P and REF5P Undercounter Refrigerators
0104175518
11
5
12
4
8
1
10
2
9
3
6
7
13
REUC235