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Section 5
Micro Display Control (MDC)
Troubleshooting
33.Coins Ignored When Entered
Does the display on the
electronic control
increment properly?
Is connector H5 on the
control firmly seated in
its receptacle?
Is the 3 pin connector
between coin drop and
control connected
correctly?
Are wires exiting coin
drop optical sensor
cracked or broken?
Exit diagnostic
testing and reset
control. (Prompting
for vend price)
Reconnect and run
diagnostic test
again.
Reconnect and run
diagnostic test
again.
Replace coin drop.
Replace coin drop.
If problem still exists
then replace the
electronic control.
Start Coin drop diagnostic tests.
(Refer to programming manual,
“ProductionTest Cycle” section.)
YES
NO
YES
YES
NO
YES
NO
NO
Gas and electric heat.
Single and three
phase power supply.
TMB2304S