38
Part Number 020007115 06/27/2019
Troubleshooting
Section 5
PUMP FLOWCHART
IF PLC PIN O-00 JUMPERED
TO +24VDC DOES PUMP
FUNCTION
24VDC ON
PLC PIN CM0
24VDC TO
PLC - GREEN LIGHT
VERIFY TUBING
FROM N GAS TANK
TO UNIT PRESS SW
REPLACE PUMP
ASSEMBLY
REPLACE OR REPAIR
PUMP HARNESS
YES
REPLACE PLC
RELAY
IS THERE +24VDC AT
PLC PIN 1(-)
VERIFY HARNESS
CORRECTLY SEATED
ON PROBES
VERIFY PRIME
BUTTON SWITCH IS
FUNCTIONAL
VERIFY WIRING TO
RELAY FROM UNIT
YES
YES
YES
YES
NO
YES
NO
NO
NO
NO
DID UNIT PRIME
AND PUMP NOW
FUNCTION
IS THERE +115VAC
AT PLC RELAY PIN
11
REPLACE OR
REPAIR PROBE
WIRING
PUMP WILL NOT
FUNCTION
VERIFY 120VAC AT
POWER SUPPLY
INLET CONNECTOR
CHECK POWER
HARNESS ON
IS 24VDC AT
POWER SUPPLY
OUTLET
VERIFY
POWERCORD
AND OUTLET
REPLACE POWER
SUPPLY
ARE BOTH
INLINE FUSES
OK
REPLACE ONE,
OR BOTH, FUSES
YES
YES
NO
NO
NO
VERFIY LDD HAS
FLUID AND TUBING
CONNECTED
VERIFY WIRING
BETWEEN PLC AND
15VDC AT
PLC PIN I-06
VERFIY N GAS TANK
CONNECTED AND
REGULATOR VALUE 90PSI
CHECK KEG CONNECTION,
TUBING, AND ATTEMPT TO
PRIME UNIT
IS THERE
+24VDC AT PLC
NO
NO
VERIFY WIRE INSERTED
PROPERLY AT PLC I-01, WIRING
TO PRESSURE SW
24VDC ON
RED WIRE TO PRESS
SW
CONNECT TANK AND
SET REGULATOR
YES
REPLACE PRESS
SWITCH
NO
VERIFY WIRING ON
PLC PINS +DC24,
VERIFY WIRING
FROM PLC RELAY TO
PUMP
YES
VERIFY 115+VAC AT
PUMP CONNECTOR
PIN 1
YES
NO
ISSUE
RESOLVED
YES
REPLACE PRIME
BUTTON SWITCH
NO
REPLACE PLC
YES
NO
YES
REPLACE PUMP
ASSEMBLY
NO
REPLACE OR
REPAIR WIRING
VERIFY 115+VAC AT
PLC RELAY PIN 14
YES
NO
YES
VERIFY PROBE
WIRING TO NITRO
BOARD
YES
CHECK INLINE
FILTER AND CLEAN
Summary of Contents for Multiplex N2Fusion
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