Tennant 7200 - Self Test Error Breakdown

ELECTRICAL
4-103
7200 330045 (10--99)
SELF TEST ERROR
BREAKDOWN
IF ERROR READS = ”BRUSH CONTACTOR OUTPUT”
(ES BUTTON HELD, DOWN PRESSURE LED #4 IS LIT)
--- DISCONNECT 12A/GRN AT M3 AND RERUN SELF TEST
--- N O E R R O R N O W = R E P L A C E M 3
--- SAME ERROR STILL: DISCONNECT CONTROL BOARD, VERIFY
1 2 A / G R N I S N O T S H O R T E D T O G R O U N D --- --- T H E N R E P L A C E T H E
CONTRO L BOARD
IF ERROR READS = ”NO BRUSH ACTUATOR ZERO
CURRENT”
(SQUEEGEE BUTTON HELD, DOWN PRESSURE LED #3 IS LIT)
--- REPLACE THE CONTROL BOARD
IF ERROR READS = ”EARLY BRUSH STALL”
(SQUEEGEE BUTTON HELD, DOWN PRESSURE LED #4 IS LIT)
--- D I S C O N N E C T B R U S H H E A D A C T U AT O R A N D R E --- R U N S E L F T E S T
--- SAVE ERROR: 18/BRN AND 19/GRN ARE SHORTED OR CONTROL
BOARD IS BAD
--- NOW GET ”NO BRUSH STALL” ERRO R: REPLACE BRUSH HEAD
ACTUATOR
IF ERROR READS = ”NO BRUSH STALL”
(SQUEEGEE BUTTON HELD , DOWN PRESSURE
LED #3 AND #4 ARE LIT)
--- 18/BRN, 19/GRN, OR THE BRUSH HEAD ACTUATOR ARE OPEN
IF ERROR READS = ”NO BRUSH MOTOR ZERO
CURRENT”
(SCRUB BUT TON HELD, DOWN PRESSURE LED #1 IS LIT)
--- IFTHEBRUSHESAREALWAYSONWHENTHEKEYSWITCHISON:
REPLACE M3 CONTACTOR
--- IF THE BRUSHES TURN ON AND OFF DURING SELF TEST: THE
CIRCUIT BOARD SHOULD BE REPLACED
IF ERROR READS = ”ZERO BRUSH MOTOR
CURRENT”
(SQUEEGEE BUT TON HELD, DOWN PRESSURE LED #2 IS LIT
AND BRUSHES TURNED ON DURING SELF TEST)
--- THE SHUNT SIGNAL IS NOT GETTING TO THE CONTROL BOARD
--- CHECK WIRES 88/BLK, 87/CLR, AND THE SHUNT HARNESS
CONNECTIONS
--- VERIFY THAT THE SHUNT IS HOO KED UP AS PER SCHEMATIC
--- REPLACE THE SHUNT AS NECESSARY