Service and Installation Manual
20Pages

! ThB Firmt cholee in valus. Installation Manual Please read this manual completely before attempting to Install or operate this equipment! Notify carrier of damage! Inspect all components Immediately. See page 2.

Serial Number Information MCII TEMPATROL® REFERENCE CHARTS To view the serial number of the ACR-26S refrigerator, open the door of the unit. The serial number is located on the inside back wall in the top left corner of the unit. Aways have the serial number of your unit available when call- ing for parts or service. A complete list of authorized Delfleld parts depots is shown on the back cover of this manual. ©1998 The Delfleld Company. All rights reserved. Reproduction without written permission is prohibited. The starburst "1" symbol is a trademark and "Delfleld" is a registered...

When the door is open, Delfield's patented air curtain design directs cold air across the cabinet opening, keeping hot air out and cold air in for extended periods of time. The unit will maintain a maximum of 45°F box temperature at 70°F ambient with the door open during peak production times, quickly returning to a normal 36°F. With the door closed, a maximum 40°F at 100°F ambient is maintained (normal operation) while running only 15% in an 85° room. Be sure the location chosen has a floor strong enough to sup- port the total weight of the cabinet and contents. Reinforce the floor if...

MCll Function Settings The MCII microprocessor has been preset at the facto- ry for the following functions eliminating the need for programming when your unit arrives. These settings must be correct for your unit to operate properly. 6. Press reset button ***Basic function ("012") must be set first otherwise it will cancel out everything previously entered. Basic Operation - For Units Built With The MCII Tempatrol( After plugging the unit in and turning the power switch to ON, the unit will operate immediately upon start without any programming of the MCII Tempatrol® required. The freezer...

MCII Tempatrol® Controls CHECK SYSTEM DEFROST AM PM DOOR AJAR ® CLEAN CONDENSER RESET RESET TIME DEFROST • Turns off alarms • Terminates the current defrost cycle • Returns display of cabinet temperature • Displays the current time (if set) • Allows setting the clock by pressing UP and DOWN buttons • Starts a manual defrost cycle when pressed simultaneously with DEFROST • Displays current defrost setting (A,3,4,6 or 8) • Allows setting defrost setting and times by pressing UP and DOWN buttons • Starts a manual defrost cycle when pressed simultaneously with TIME TEMP UP • Displays current...

MCII Tempatrol® Display Functions (continued) Door ajar The DOOR AJAR indicator light will come on when a door is opened. If the door remains open for more than display will begin to flash. After three minutes, a loud beep is emitted every three sec- onds. The flashing display and warning beep will stop when RESET is pressed. If the door is not closed when RESET is pressed, the same cycle will repeat. Clean condenser indicator light is a mainte- nance reminder that comes on every 90 days. It will go off when the RESET button is The DEFROST indicator light comes on during defrosting cycles....

MCII Tempatrol® Programming (continued) Setting defrost cycles Setting defrost cycles on freezer units is done via the MCII Tempatrol. The automatic defrost cycle is preprogrammed at “3” in the factory, and no adjustment is needed to use the unit with this setting. A custom defrost cycle for freezers can be programmed if desired. For information on how to determine the proper defrost setting for your application, see page 9. Refrigerators defrost automatically; no adjustment is needed. Follow these steps to set or change the defrost cycle: CHECK SYSTEM DEFROST AM PM CHECK SYSTEM DEFROST AM...

MCII Tempatrol® Defrost Settings Refrigerators automatically defrost, using a special defrost program in the MCII Tempatrol®. A refrigerator will defrost whenever the MCII Tempatrol detects poor unit efficiency. A refrigerator defrost will rarely occur. However, under certain conditions, a defrost may be needed to assure optimum per- formance. Defrost cycles will occur more frequently at interior temperature settings of 34°F (1°C) or less. Frequent defrosts may also occur when room temperatures are unusually high. Refrigerator defrosts cannot be adjusted; however, pressing the RESET button...

MCII Tempatrol® Optional Settings (continued) Locking control settings You can lock the control settings so that they cannot be changed without knowing how to unlock them. This will pre- vent unsupervised changes to the set point or defrost cycles. Ol) Press the TIME and DOWN buttons simulta- neously then press the TEMP button. STEPS 2) Press the DEFROST button. The condensing unit will shut off, and the display will read 000. 3) Press UP until the display reads 009. 4) Hold the TIME button, and press UP or DOWN until the display shows L for locked, or U for 5) Release the TIME button. The...

MCII Tempatrol® Self-Diaqnostic System Check system indications A Whenever a CHECK SYSTEM indication ^Lj^. appears, a potentially serious problem has CAUTION occurred. Appropriate action should be taken immediately to ensure proper product temper- ature is maintained. A qualified service agent should be called whenever a serious problem You may be able to speed up the repair process, however, by noting the diagnostic codes provided on the digital display by the MCII when a problem occurs. Using the diagnostic mode Using the following instructions, enter the diagnostic mode and write down...

MCII Tempatrol® Diagnostic Codes (Reference Chart) 1 Low evaporator tempe ratu re w ith high superheat orH (freeze E on ry) low s u perheat w ith low te mpe ratu re diffère noe Qeckevaporator for frost accu mu lationH Checkfans a nd eva porator air f lowH Qeckfor frost backto compressor for ove rchargeH Checkfor leaksH Checkfcc possible restriction in capillary tube and dirt or moisti NOTE Vacuate and recha rge afte ra ny corrective actions bow su pe rheat with h ig h te mpe ratu re diffère nee Qeckevaporator fansH Checkfcc frost on the eva porator coil No su perheat with no te mpe ratu re...