Pump Flowchart - Manitowoc Multiplex N2Fusion Service Manual

Troubleshooting

PUMP FLOWCHART

VERIFY 120VAC AT
PUMP WILL NOT
POWER SUPPLY
FUNCTION
INLET CONNECTOR
YES
VERIFY +24VDC TO VERIFY +15VDC AT
PLC - GREEN LIGHT PLC PIN I-06
NO
YES
REPLACE PLC
NO
VERFIY N GAS TANK CONNECT TANK AND
CONNECTED AND SET REGULATOR
REGULATOR VALUE 90PSI
YES
VERIFY TUBING
IS THERE
FROM N GAS TANK +24VDC AT PLC
TO UNIT PRESS SW
YES
38
NO
CHECK POWER
HARNESS ON
YES
IS 24VDC AT
POWER SUPPLY
OUTLET
NO
VERIFY WIRING VERFIY LDD HAS
BETWEEN PLC AND FLUID AND TUBING
CONNECTED
NO
VERIFY WIRE INSERTED
PROPERLY AT PLC I-01, WIRING
TO PRESSURE SW
NO
VERIFY WIRING ON
VERIFY +24VDC ON
PLC PIN CM0 PLC PINS +DC24,
YES
IF PLC PIN O-00 JUMPERED
VERIFY WIRING
TO +24VDC DOES PUMP
FROM PLC RELAY TO
FUNCTION
PUMP
YES
VERIFY PROBE
WIRING TO NITRO
BOARD
NO
VERIFY HARNESS
REPLACE OR
CORRECTLY SEATED
REPAIR PROBE
ON PROBES
WIRING
YES
REPLACE PUMP
ASSEMBLY
VERIFY
POWERCORD
AND OUTLET
NO
REPLACE POWER
SUPPLY
YES
NO
ARE BOTH
INLINE FUSES
OK
YES
CHECK INLINE CHECK KEG CONNECTION,
FILTER AND CLEAN TUBING, AND ATTEMPT TO
PRIME UNIT
YES
VERIFY +24VDC ON REPLACE PRESS
SWITCH
RED WIRE TO PRESS
SW
REPLACE OR
REPAIR WIRING
YES
NO
VERIFY 115+VAC AT
IS THERE +24VDC AT
PLC RELAY PIN 14
PLC PIN 1(-)
NO
IS THERE +115VAC
AT PLC RELAY PIN
REPLACE ONE,
OR BOTH, FUSES
YES
DID UNIT PRIME
AND PUMP NOW
FUNCTION
NO
NO
VERIFY PRIME
BUTTON SWITCH IS
FUNCTIONAL
YES
YES
YES
VERIFY 115+VAC AT
PUMP CONNECTOR
PIN 1
NO
NO
NO
REPLACE OR REPAIR
PUMP HARNESS
11
YES
VERIFY WIRING TO
RELAY FROM UNIT
REPLACE PLC
RELAY
Part Number 020007115 06/27/2019
Section 5
ISSUE
RESOLVED
REPLACE PRIME
BUTTON SWITCH
REPLACE PUMP
ASSEMBLY