Alto-Shaam QC-40 User Manual download pdf (Page 6)

RELAY BOARD

The relay board (Figure 11) is mounted in a metal enclosure with a metal or lexan cover over it. For the

QC-3 it is located behind the front grille, mounted to the left of the compressor and can be slid out for

servicing. For the QC-20 it is located behind the CPU enclosure, laying flat and can be slid out for servicing.

For the QC-40 it is located behind the lower grille, mounted to the left of the compressors and can be slid

out for servicing. For the QC-50 it is located behind the upper grille, to the left of the compressors and can

be accessed by removing the metal cover. For the QC-100 it is located inside the locked CPU enclosure at the

top of the enclosure.

The relay board has 6 (F1-F6) 2A fuses to protect the fans. There are 6 (F7-F12) 4A fuses to protect the

defrost heaters in all Quickchillers except the QC-40 which uses 6.3 Amp fuses. All units use 2 (F13-F14)

300MA fuses to protect the refrigerant solenoids and 1 (F14) 250MA fuse to protect the compressor relays. The

2 (F16-F17) 1A fuses protect the 24 VAC power to the CPU board.

Figure 11

FAN FUSES

DEFROST

HEATER

FUSES

COMPRESSOR

FUSE

SOLENOID

FUSES

HEATER DEFROST

RELAYS 14VDC

POWER LED

EVAPORATOR FANS

LEFT

RIBBON CABLE

CONNECTOR

DOOR

SWITCH

BEEPER 5DVC

TO CPU BOARD

24VAC

TO CPU BOARD

24VAC

FROM

TRANSFORMER

CPU

POWER FUSES

EVAPORATOR FANS

RIGHT

DEFROST

HEATERS

REFRIGERANT

SOLENOID

RIGHT LEFT

COMPRESSORS

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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Alto-Shaam QC-40 User Manual Page 6

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