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Revision 2.EL950 1.3.1074C 18.6
to the controller may be bad. If it is an individual motor, the motor count you see when entering service
mode will not have the correct count. The easiest way to troubleshoot this situation would be to swap
tray connections where the tray harness plug plugs into the machine. For example it the problem appears
on tray 1, unplug tray 1 and tray 2 (assuming they both have the same number of selections), swap the
connections and plug tray 1 into tray 2 receptacle and vice versa. Now do your test vending by selecting the
tray 2 selections on the keypad and the tray 1 should operate. If the problem follows the
tray then suspect either the motor or the tray cable harness. If the problem stays with the A receptacle
and now the B tray exhibits the problem then the problem is in a connection somewhere between the A
receptacle and the controller board. Make sure to examine any and all connections for any loose wires, etc.
Q:
My display is dead or intermittent but the rest of the machine appears to be working.
A:
Check the gray flat ribbon cable connection between the display and the controller board to insure
the plugs are plugged in securely.
Q:
My machine will not cool.
A:
1.
Make sure the machine programming is set up properly. Factory setting is 39°F. Setting the
machine any lower could cause the machine to freeze up.
2.
Inspect the evaporator coil to see if it may be frozen over. Using a flashlight shine it into the
evaporator fan located under the bottom tray. You are looking for aluminum fins behind the fan motor.
If they are completely white or solid with ice this will keep the air from flowing properly and cause the
machine to not cool. To thaw out remove the 4 prong condensing unit plug, not the evaporator fan plug
and just close the door and let set for overnight to insure it completely defrosts. Be prepared in case the
defrost water pan overflows on the floor. You may need to set some towels around and under the machine
to catch any overflow. After the machine is thawed completely out you will want to check the temperature
settings to insure they are not set too cold.
3.
Check the door switch. The easiest test is to close the door, then while opening the door
watch the display to see if you see the message No Errors and hear an audible beep. If you do not then
suspect the door switch may need adjustment. You can reach over the door and press it manually while
watching the display to see if it works.
4.
As a manual test of the cooling system you can enter the Test Mode section of the menu and
select the Test Relays function. Relay 1 controls the condensing unit, and Relay 2 controls the evaporator
fan. If either one does not turn on while testing, then suspect a relay has quit working or connection has
become loose.
