Alto-Shaam QC-40 User Manual

9.Figure 18EVAPORATOR COIL AND SENSOR LOCATION (MODELS QC3 AND QC20)COIL SENSORDEFROSTTERMINATORAIR TEMPERATURESENSORTEMPERATUREEXPANSION VALVEPRODUCT

The QC40 has a split coil evaporator under the floor of the cabinet and uses 3 evaporator fans.10.Figure 19EVAPORATOR COIL AND SENSOR LOCATION (MODEL

11.The QC50 has 2 evaporators on the left side of the cabinet along with an evaporator in the ceiling of thecabinet. There are a total of 6 evaporato

TROUBLE SHOOTING EVAPORATOR COMPONENTSFAN TERMINATORThe fan terminator is located on the suction line and iscovered by cork tape. The terminator is c

DOOR SWITCHThere are up to three types of door switches that were installed on theQuickchillers. The oldest type was installed in the bottom of the t

14.Figure 25CONDENSER COMPONENTSRELAY BOARDENCLOSUREOPERATING PRESSURES(R404A) LO 20-25 LBS. @ 38 DEGREES F (AMBIENT: 90 DEGREES F)HI 275-300 LBS.(R2

DIAGNOSTIC MENU SCREENAs an aid for repairing or checking the Quickchiller, adiagnostic menu allows the technician to independently enableor disable t

16.QC-3 CONTROL SETTINGSPRINTERPrinter Interface = SerialBaud Rate = 4800Stop Bits = 1 bitPrinting Delay = 40 [40]Sample Period, min. = 5 [ 5]Print G

17.QC-50 CONTROL SETTINGSPRINTERPrinter Interface = SerialBaud Rate = 4800Stop Bits = 1 bitPrinting Delay = 40 [40]Sample Period, min. = 5 [ 5]Pri

SERVICE NOTES18.

TROUBLESHOOTING THE QUICKCHILLERThe QuickChiller is a stand alone, high capacity refrigeration system used to rapidly and uniformly lowerthe temperatu

#8421 • 6/01PHONE: (262)251-3800 (800)558-8744 U.S.A./CANADA●Ken Kreuscher, Service Manager●EXTENSION 6425●Mike Hlavenka, Service Support Tech●EXTENS

QUICKCHILLER SET-UPSince all Quickchillers use the same microprocessor, theymust be configured for each specific model. The set-up iscompleted at the

correct setting. Temperatures that require a negative number canbe entered by using the minus key ”-“ on the keyboard. To exit,press the “D” key and

4.TROUBLE SHOOTING THE CPU BOARDIf the CPU board is suspected as the problem, open the locked CPU access door and verify the greenpower LED is illumin

RELAY BOARDThe relay board (Figure 11) is mounted in a metal enclosure with a metal or lexan cover over it. For theQC-3 it is located behind the front

6.There are 16 LED’s on the relay board (Figure 12) that illuminate when that function of the board isenergized and can be used in diagnostics.NOTE: T

Even though the fan LED’s are illuminated on the relay board, theterminator must be satisfied before the fans will operate.NOTE: IF THE EVAPORATOR CO

The condenser unit(s) solid state relay(s) are powered by the relayboard through the J6 plug located on the upper right corner of the relayboard (Figu