Troubleshooting guide

STEP 2
VERIFYING POWER TO ELECTRONIC BOARD
THE FOLLOWING STEP WILL VERIFY POWER IS GOING TO THE BOARD.
TURN OFF ALL POWER TO THE UNIT.
REMOVE THE 4 SCREWS FROM THE PLASTIC BOARD PROTECTOR AND
REMOVE THE COVER.
TURN ON ALL BREAKERS. WHEN BREAKERS ARE TURNED ON THE LED
DISPLAY ON THE UNIT WILL TURN ON FOR A COUPLE OF SECONDS AND
THEN TURN OFF. THIS INDICATES THAT THERE IS POWER GOING TO THE
BOARD. THE LED DISPLAY WILL FROM THEN ON ONLY TURN ON AND
DISPLAY THE TEMPERATURE SETTING ON THE CONTROL WHEN HOT WA-
TER IS DEMANDED OR IN USE, OTHERWISE THE LED DISPLAY WILL RE-
MAIN OFF. IF THE BREAKERS ARE TURNED ON AFTER BEING DISCON-
NECTED AND NO LED DISPLAY LIGHT TURNS ON FOR A COUPLE OF SEC-
ONDS, THERE MIGHT BE A BURNT FUSE OR OTHER ELECTRICAL PROBLEM
WITH THE BOARD. LET’S PROCEED TO TEST THE BOARD.
THERE IS ALSO AN IN LINE FUSE PROTECTION BEFORE THE BOARD. IF
THE FUSE IS BAD THE BOARD WILL HAVE NO POWER AND THEREFORE
THE UNIT WILL NOT OPERATE.
CHECK THE FUSE USING YOUR MULTIMETER. USE THE MULTIMETER TO
PERFORM A CONTINUITY TEST BY PLACING ONE PROBE ON ONE SIDE OF
THE TRANSFORMER AND THE OTHER ON THE OTHER SIDE. IF THE
MULTIMETER BEEPS OR THE DISPLAY NUMBER CHANGES THEN THE FUSE
IS GOOD, IF THE DISPLAY NUMBER REMAINS THE SAME AND THERE IS NO
SOUND THEN THE FUSE IS BLOWN.
TO VERIFY THE ELECTRICAL CONNECTIONS INTO THE BOARD, FIRST TURN
OFF THE POWER TO THE BOARD. ONCE POWER IS OFF, PROCEED BY
FLIPPING THE BOARD AROUND SO THAT THE LED DISPLAY IS FACING
AWAY FROM YOU. TURN THE POWER BACK ON. THEN TAKE THE
VOLTMETER AND PLACE ONE PROBE ON THE METAL PAD CONNECTED TO
THE POWER IN THE UPPER RIGHT CORNER OF THE CIRCUIT BOARD. WITH
THE OTHER PROBE, TOUCH THE PAD THAT IS IN IN THE TRACE TO THE
LEFT OF THE POWER PAD. GETTING A READING ON THE VOLTMETER CAN
BE DIFFICULT ON THESE SMALL SURFACES SO BE PATIENT. THE
VOLTMETER SHOULD READ 240V WITH THE PROBES IN THESE POSITIONS.
TO FURTHER VERIFY THE POWER IS GOOD PLACE THE PROBES ON TWO OF
THE METAL PADS CONNECTED TO THE TRANSFORMER. IF YOU
PLACE THE PROBES ON THE UPPER TWO THE VOLTMETER SHOULD READ
240V, ON THE LOWER TWO IT SHOULD READ 10V.
FAILURE TO FOLLOW THESE PROCEDURES WILL DAMAGE BOARD, THIS
TYPE DAMAGE IS NOT COVERED UNDER THE LIMITED LIFETIME WAR-
RANTY. THEREFOE IF YOU ARE UNCOMFORTABLE OR UNCERTAIN ON HOW
TO PROCEED PLEASE CONTACT OUR TECHNICAL SUPPORT DEPT.