Bunn SmartWAVE - Drain the Tank; Service Fault Codes- Digital Smartwave; Service Fault Codes - Smartwave Silver Series; Troubleshooting

SmartWAVE
®
Training Manual
18
Troubleshooting and Repair
Draining the Tank
Step 1:Disconnectthewaterandelectricalsupplies.
Step 2:Removethefrontcover.
Step 3:Pinchoffthellhose.
Step 4:Loosentheclampfromthellsolenoid.
Step 5:Removethehosefromthesolenoidanddrainintoa
sink or bucket.
Service Fault Codes- Digital SmartWAVE
®
Display Message Description Action
ER 1 Temperature sensor shorted Check the temperature sensor
ER 2 Temperature sensor open Check the temperature sensor
ER 3 Heating time too long Troubleshoot heating circuit
ER 4 Relltimetolong Troubleshootrellcircuit
ER 5 High tank level- during brew Delime sprayhead and tube
ER6 Enable Brew On/Off switch Check switch
ER 7 Brew A switch Check switch
ER 8 Brew B switch Check switch
ER 9 Hidden switch Check switch
Service Fault Codes- SmartWAVE
®
Silver Series
Red LED Flashes Description Action
1 Temperature sensor shorted Check the temperature sensor
2 Temperature sensor open Check the temperature sensor
3 Heating time too long Troubleshoot heating circuit
4 Relltimetolong Troubleshootrellcircuit
5 High tank level- during brew Delime sprayhead and tube
6 Enable Brew On/Off switch Check switch
7 Large batch switch Check switch
8 Small batch switch Check switch
Troubleshooting
Like all BUNN
®
equipment the most important tools required for troubleshooting are the wiring schematic and a multi-
meter. As with all digital equipment eliminate all component issues prior to replacing the control board.
It is always a good idea to do some quick checks prior to working on the machine to eliminate site issues. Check
watersupplytothemachine,makesurethewaterltrationoutputpressureiswithinspecicationandensureallof
the water supply valves are open. Check to make sure the machine is plugged in, the breaker is turned on, and that
correct voltage is being supplied.