APi 748 V1.1 406
4.16
P/N 77500001
Back
Problem Probable
Cause Solution
Refrigeration inoperative
Refrigeration unplugged or no power
Refrigeration relay unplugged
Refrigeration overload
Relay (control) defective
Check and replug.
Connect Refrigeration relay.
Clean screen and condenser coils.
If (A & B) hold true,
A. Back up control LED and Compressor
LED are both lit.
B. Refrigeration unit does not power up.
Perform the following:
Turn power off.
Short together the (blk) and (yl/blk) wire
on the Refrigeration relay.
Turn power on.
If Refrigeration Unit now powers
up, replace the Refrigeration/
Turret Module.
Compressor
does
not
start No voltage on (blk) wire with
Evaporator/Blower not running
No voltage on (yl/bk) wire
Low line voltage
Start Relay contacts defective
Motor overload defective
Start Capacitor defective
Compressor head load too high
Defective Refrigeration unit line cord.
Check and/or replace
Refrigeration/Turret Module.
Check voltage. It should be 105V
minimum with Compressor running.
Replace Start Relay.
Check and replace.
Check and replace.
Allow 3 minutes off time for pressure
equalization before restarting and
performing pressure checks.
Summary of Contents for Showcase 748
Page 73: ...APi 748 V1 1 406 6 2 P N 77500001 Back Main Door Exterior ...
Page 75: ...APi 748 V1 1 406 6 4 P N 77500001 Back Message Center ...
Page 77: ...APi 748 V1 1 406 6 6 P N 77500001 Back Main Door Interior ...
Page 79: ...APi 748 V1 1 406 6 8 P N 77500001 Back Lower Main Door Components ...
Page 81: ...APi 748 V1 1 406 6 10 P N 77500001 Back Coin Mech Compartment ...
Page 83: ...APi 748 V1 1 406 6 12 P N 77500001 Back Door Assembly Coin Mech Compartment ...
Page 85: ...APi 748 V1 1 406 6 14 P N 77500001 Back Cabinet Final Assembly ...
Page 88: ...APi 748 V1 1 406 6 17 P N 77500001 Back This Page Intentionally Left Blank ...
Page 91: ...APi 748 V1 1 406 6 20 P N 77500001 Back Main Power Switch ...
Page 93: ...APi 748 V1 1 406 6 22 P N 77500001 Back Turret Drive Motor ...
Page 97: ...APi 748 V1 1 406 6 26 P N 77500001 Back Plate Assembly Locks Delivery Door ...
Page 99: ...APi 748 V1 1 406 6 28 P N 77500001 Back Refrigeration Unit 120 V Domestic Control Box Assem ...