SO-LOW PC85 Series Ultra Low Freezer User Manual
- October 30, 2023
- SO-LOW
Table of Contents
PC85 Series Ultra Low Freezer
Product Information
The product is a freezer that must be used with caution to
reduce the risk of fire, electric shock, or injury to persons. The
user manual contains safety instructions and symbols that must be
understood before operating the unit. The unit must not be modified
in any way, and it must be positioned at least 6 inches away from
any wall or object on any side. Any repair or replacement of the
freezer must be done by authorized personnel. The manual also
contains instructions for pre-installation, freezer storage, alarm
battery replacement, cleaning, defrosting, and changing
setpoint/operation temperature. The unit must operate on a
dedicated electrical line and only plugged into the proper outlet.
Failure to follow these instructions may result in hazard and void
warranty.
Product Usage Instructions
Before using the freezer, read all instructions in the user
manual and follow basic safety precautions:
-
Do not modify the plug provided with the freezer.
-
Ensure that the unit is positioned at least 6 inches away from
any wall or object on any side. -
Do not attempt to repair or replace any part of the freezer
without first contacting the So-Low Service Department. -
Operate the unit on a dedicated electrical line and only plug
it into the proper outlet. -
Do not position equipment so it is difficult to disconnect from
the power supply.
The user manual also contains instructions for pre-installation,
freezer storage, alarm battery replacement, cleaning, defrosting,
and changing setpoint/operation temperature. Follow these
instructions carefully to prevent damage to the unit and ensure
optimal performance.
To reduce the risk of fire, electric shock or injury to persons using this
freezer, read all instructions and follow basic safety precautions before
using the unit, including the following:
Do not modify the plug provided with the freezer. If it will not fit the
outlet, have a proper outlet installed by a qualified electrician.
Do not position equipment so it is difficult to disconnect from the power
supply. freezer must be at least 6″ away from any wall or object on any side.
While under warranty, do not attempt to repair or replace any part of the
freezer for servicing without first contacting the So-Low Service Department.
SAVE THESE INSTRUCTIONS
MEANING OF ILLUSTRATED SYMBOLS…………………………………… STARTING INSTRUCTIONS…………………………………………………..
PRE-INSTALLATION INFORMATION…………………………………………
FREEZER STORAGE PROCEDURE………………………………………… ALARM BATTERY REPLACEMENT………………………………………….. CLEANING PROCEDURE…………………………………………………….. DEFROSTING PROCEDURE…………………………………………………. CLEANING AIR CONDENSER…………………………………………………
CHANGING SETPOINT / OPERATION TEMPERATURE………………….
ALARM SYSTEM……………………………………………………………….. 8 DRY CONTACT RELAY……………………………………………………….. 8
CONTROL KEYS & DISPLAYS……………………………………………….. 9 CONTROL DISPLAY
VALUES………………………………………………… 10 USER PARAMETER MODE…………………………………………………… 10
PROGRAM PARAMETER MODE……………………………………………. 11 CALIBRATION
PROCEDURE………………………………………………… 12
MAINTENANCE CHECKLIST DIAGRAMS
Various symbols are used in this safety manual in order to use the unit
without danger of injury and damage of the unit. Be sure that you understand
the warnings and cautions in this manual before operating the unit.
CAUTION
BLACK WITH YELLOW BACKGROUND LIGHTNING BOLT
CAUTION, RISK OF ELECTRICAL SHOCK
WARNING
BLACK WITH YELLOW BACKGROUND EXCLAMATION POINT
CAUTION, REFER TO ACCOMPANYING DOCUMENTS
WARNING
DURING OPERATION THIS UNIT MUST REMAIN IN UPRIGHT POSITION. DURING
TRANSPORATION UNIT MUST NOT BE TIPPED MORE THAN 45° FROM UPRIGHT POSITION.
CAUTION
UNPLUG UNIT AND SWITCH OFF ELECTRICAL BREAKER BEFORE ANY TECHNICAL SERVICE IS
PERFORMED.
CAUTION
COVERS ON BACK / SIDE OF FREEZER MAY ONLY BE REMOVED BY AUTHORIZED PERSONNEL.
FAILURE TO RE-INSTALL COVER COULD RESULT IN HAZARD.
CAUTION
UNIT MUST BE OPERATED ON A DEDICATED ELECTRICAL LINE. USING A NON-DEDICATED
LINE MAY RESULT IN UNIT STARTUP FAILURE.
CAUTION
ONLY PLUG THIS UNIT INTO THE PROPER OUTLET. DO NOT ATTEMPT TO MODIFY PLUG IN
ANY WAY. IMPROPER USE OF THE ELECTRICAL PLUG WILL VOID WARRANTY.
WARNING
DO NOT POSITION EQUIPMENT SO IT IS DIFFICULT TO DISCONNECT FROM THE POWER
SUPPLY.
ATTENTION
RISK OF ELECTRICAL SHOCK USE CAUTION NEAR ELECTRICAL CONNECTIONS
NOTICE
NOTICE
THE LO-BAT (LOW BATTERY ALARM) IS NOT ABLE TO BE SILENCED OR DISABLED. TO
REDUCE THE VOLUME OF THE ALARM UNTIL A REPLACEMENT CAN BE INSTALLED, A PIECE
OF TAPE CAN BE PLACED OVER THE BUZZER HOLE ON THE CONTROL
CAUTION
DISCONNECT THIS UNIT FROM THE POWER SUPPLY BEFORE PERFORMING MAINTENANCE ON
THE UNIT.
ATTENTION
FOR UPRIGHT UNITS, IT IS IMPORTANT TO PROTECT THE CONTROL FROM DRIPPING WATER.
PLACE A CLOTH OR TOWEL ON THE LEADING EDGE OF THE COOLING CHAMBER ABOVE THE
CONTROL TO DEFLECT / ABSORB WATER THAT COULD DRAIN ONTO THE CONTROL.
ATTENTION
IT IS RECOMMENDED TO SLOWLY RE-ADD YOUR PRODUCT INTO THE FREEZER TO PREVENT AN
EXTREME LOAD ON THE COMPRESSORS, WHICH COULD SHORTEN FREEZER LIFE EXPECTANCY.
ATTENTION
IT IS RECOMMENDED TO CLEAN THE CONDENSER AT LEAST ONCE EVERY 90 DAYS TO
PREVENT DUST BUILDUP.
TEMP -888
SET -888
WARNING
CHANGING THE CONTROL PARAMETERS OUTSIDE OF THE MANUFACTURE RECOMMENDED RANGE,
COULD SHORTEN THE LIFE-SPAN OF YOUR EQUIPMENT; OR CAUSE ISSUES RESULTING IN
MECHANICAL FAILURE.
WARNING
USE ONLY THE “UP” AND “DOWN” KEYS WHEN MAKING CHANGES ON THIS CONTROL.
WARRANTY WILL BE VOID IF USED IN ANY OTHER WAY. CONTACT FACTORY FOR ALL OTHER
ADJUSTMENTS IN SETTINGS.
·
ATTENTION
THE BATTERY DOES NOT POWER THE COOLING SYSTEM.
WARNING
IF IT IS NECESSARY TO REMOVE METAL COVER SCREEN ON BACK OF FREEZER TO MAKE
CONNECTIONS TO ALARM RELAY, COVER MUST BE REPLACED BEFORE FREEZER IS PUT INTO
OPERATION
TEMP -888
SET -888
TOUCH KEYS
Pressing key while in normal control
mode Press both keys
simultaneously Press both keys
simultaneously
FUNCTION Up Key
Down Key
Scroll Key
Current Power Reading
Alarm Test
DESCRIPTION
Press and release to increase the control set-point (while in normal control
mode) or to change lower display program parameter (while in User Menu or
Factory Mode). Press and hold to accelerate increment speed.
Press and release to decrease the control set-point (while in normal control
mode) or to change lower display program parameter (while in User Menu or
Factory Mode). Press and hold to accelerate decrement speed.
Press and hold for at least 2 seconds and release (while in normal control
mode) to access operator level parameters. Press and release to cycle through
all user parameters. Press and hold for 2 seconds and release to silence
audible alarm under normal power or on battery power. While unit is in an
alarm condition, the external alarm relay contacts will remain energized until
the alarm condition no longer exists. Press and hold to display chamber
temperature while the controller is on battery power. Chamber temperature will
be displayed until key is released. Alarm contact will remain energized while
operating on battery power.
Displays current AC power (i.e. 110VAC) as long as keys are pressed. If power
is 110VAC or 220VAC, unit will display 110. Mode is only active during normal
control mode (when top display = PV, Lower display = SP). N/A on battery
power.
Energize audible alarm and alarm relay output as long as keys are pressed.
Mode is only active during normal control mode (when top display = PV, Lower
display = SP). N/A on battery power.
AAEE I I NnSSX
BbFF J J OoT t Yy
CCGGK Y P PUu Z
C c HHL L Q
Vu ? ?
D d h hMNR r W
= =
: Confused Character
To enter the user parameter mode, hold the Scroll Button for 2 seconds and
release.
To make changes in the user parameter mode, press the up or down arrows.
To exit the user parameter mode, press and release the Scroll Button.
To page through Parameters; Press and Release the scroll key
Please read the superscript instructions (bottom of page) for each Parameter
value.
THE FOLLOWING VALUES WERE SET WHEN THIS UNIT WAS SHIPPED
PARAMETERS
SPL 3 SPH 3 Al 2 INV 1 SHF 1 ASP 1 AHY 3,1 OHY 3,1 RB 1 DoR 4 SP 2 IN2 4
DESCRIPTION
Lower Setpoint Upper Setpoint
Alarm Temperature Scale
Calibration Alarm Differential Alarm Hysteresis Output Hysteresis Alarm Delay
in Minutes
Door Alarm Setpoint N / A
°F -148 -40
°F
22 1.8 3.6
°C
ON
-100
-40
X
°C
12 1.0 2.0 30
X N / A
OFF X X
X X X X X X X
Table 4.1 Common Failure Causes and Corrective Actions
Error Code
Error Description
Corrective Action
Button on keypad collapsed or stuck.
Replace keypad.
Error reading/writing to non-volatile memory. Upscale sensor break.
Replace EEPROM (requires returning unit to the factory for service). Check sensor connections, verify output of sensor is valid.
Table 4.2 Error Codes and Corrective Actions
5-1 Controller Specifications
Power Requirements
Main: 12VAC (420mA), 5VA Max. Battery Back-up: 6 VDC (Lead Acid Re-chargeable,
1.2Ah min.) Battery Charge Current: < 400mA
Accuracy
+/- 1 Digit
Input #1
Type “T” Thermocouple or Platinum 100 Ohm RTD (0.00385 Ohms/Ohm/ºC)
Input #2
Type “T” Thermocouple
Input Type Range Low
Range High
PT.100 -230 ºC (-382 ºF) 400 ºC (752 ºF)
Type “T” TC -250 ºC (-418 ºF) 300 ºC (572 ºF)
Table 5.1 Input Ranges
User Interface
Dual 4-Digit LED Displays: Upper Display 0.55″ (14mm) Lower Display 0.40″
(10mm) Keypad (3 touch keys)
Overall Dimensions
6-1/4″ x 8-1/2″ (158.75mm x 215.90mm)
Environmental
Operating Temp: 0 to +60ºC Storage Temp: -40 to +60º Humidity: 0 to 90% RH
(non-condensing)
Approvals
UL / CUL / CE Pending
Backup Battery Life
70 hours using 6VDC, 1.2A rechargeable battery
Sensor Break Detection
Sensor open for TC or RTD
Sensor Break Response Time
< 4 seconds for TC or RTD
Control Mode
Control Output: Direct (Cooling) On/Off with adjustable set-point and
hysteresis.
Alarm Output: Programmable Deadband with adjustable hysteresis.
Control and Alarm Output
DPDT Relay, 2A @ 30 VDC, 2A @ 125 VAC, 1A @ 230VAC (all resistive loads)
Press and Release the scroll key to page through Parameters.
Once value SHF is shown, Use the or arrow keys to change value to ON.
PARAMETERS
SPL 3 SPH 3 Al 2 INV 1 SHF 1
DESCRIPTION
°F
°C
ON OFF
Lower Setpoint
Upper Setpoint
Alarm
Temperature Scale
Calibration
X
·
· ·
Q:
· · · · · ·
COMPRESSOR MODEL HP
TECUMSEH AJB2433ZXA 1
TECUMSEH AJB2433ZXD 1
EMBRACO FFI12HBX 1/3
DANFOSS SC15FTX
1/3
DANFOSS SC18FTX
1/2
VOLTAGE 115
208/220/230 115 115
208/220/230
HERTZ 50/60 50/60 50/60 50/60 50/60
PHASE 1 1 1 1 1
PART #
AJB24-115 AJB24-208 FF12-115 SC15-115 SC15-208
TEMPERATURE CONTROL PARTS FDC 4000 FDC nCOMPASS
4000 nCOMPASS
PART #
CASCADE ELECTRICAL PARTS Heater Harness No. H-200 Refrigeration Switch No. 2X464 Condenser Fan Motor No. GE-5411 – 115/60/1 Condenser Fan Motor No. GE-5421 – 230/50-60/1 Electrical Cord No. 8-3 (Please Specify Voltage) Control Board No. CECB2TUV (Please Specify Voltage)
PART #
217-VOLTAGE TOGGLE 500-115 500-VOLTAGE PWRCRD-VOLTAGE 231-VOLTAGE
REFRIGERATION HIGH STAGE PARTS Air Cooled Condenser No. 3CZ0602B Drier No. C-053-S Capillary Tube Oil Separator, Temprite Series 900 (If Applicable)
254 256H HS-17, HS-20 900
PART #
REFRIGERATION LOW STAGE PARTS Pressure Control No. 20PS01-0039 Receiver Condenser Drier No. CO-52S-S Capillary Tube Oil Separator, Temprite Series 900 (If Applicable)
259 RCN-LS 256L LS-28, LS-31 900
PART #
HARDWARE PARTS Latch No. METL-L1-99 Chest Hinge Upright Hinge No. Polar 109-LH Cabinet Gasket Lid or Door Gasket Grill No. 650H Sub-Lids (Must have Model Number) Inner Door (Must have Model & Serial Number) Clips & Rollers for Inner Doors (Quantity 10 minimum) Shelves for Freezer (Must have Model Number)
PART #
REX37L1-3 59-928M 59-928U NX504B1 PSOS 356F, 356S SL-MODEL NUMBER 357-MODEL
NUMBER-SERIAL NUMBER 405 4015-MODEL NUMBER
WARNING
IF FAILURE OCCURS AND UNIT IS STILL UNDER WARRANTY, DO NOT ATTEMPT TO MAKE ANY
REPAIR MODIFICATIONS TO THE UNIT BEFORE CONTACTING THE SO-LOW SERVICE
DEPARTMENT, AS THIS MAY RESULT IN WARRANTY BEING VOIDED.
BK
B R
HIGH STAGE
LOW STAGE
BK
REFRIG. SWITCH
R
R
PRESSURE SWITCH
R
R
B B
FDC4000
TC INPUT
TO RECHARGEABLE BATTERY
+ – 6.8VDC 12V AC
CIRCUIT BREAKER
BK
R
G
W
BK
R B
BK TRANSFORMER
(IF APPLICABLE)
W
BK
R
B
BK
HEATER(S)
NOTE: ACCESSORIES ARE CONNECTED TO AC TERMINAL STRIP
ELECTRICAL DIAGRAM 208-230 VOLTS, 50/60 HERTZ, 1 PHASE
COND. FAN(S)
BK BK
GY
TEMP. REC. (IF APPLICABLE)
OO
TRANSFORMER
BK BK
FDC-4000 CIRCUIT BREAKER CBG230
COLOR CODE CHART
YELLOW = Y ORANGE = O BLUE = B RED = R WHITE = W GREEN = G
GREEN/YELLOW = GY
BLACK = BK
10-1-2008