Parker V300, Product Bulletin

Page: 23 / 36

Bulletin 76-00 B
23
V300 Service Pointer
Symptom Possible Cause Solution
Strong Ammonia smell coming
from bubbler (#22).
Water make up closed or restricted.
Make sure the fresh water supply to the bubbler is not turned off or being restricted.
Check the operation of the water makeup solenoid. Verify that the coil is energized
when the vent cycle is active. The magnetic field can be verified with a small
screwdriver touching the top of the solenoid tube. It should be drawn to the tube if the
coil is powered and functioning properly. If the coil functions and water still does not
flow to the bubbler, check the supply lines for obstructions.
Use filtered/soft water.
Replace the water solenoid, #19 in the exploded view, if necessary.
Leaking vent solenoid.
If bubbles are seen in the bubbler well after a vent has occurred, the vent solenoid
may be leaking.
Replace the solenoid if necessary.
Purger display goes black (full
contrast)
Coil interference
ADVISORY - It is recommended that Refrigerating Specialties coils be used with
the Refrigerating Specialties Rapid Purger for optimal performance. If
the use of Refrigerating Specialties coils is not an option, coils with an
inrush current rating of less than 1.22 amps MUST be used.
If this symptom is presented it is recommended that an RC filter or MOV suppressor
be added to the coil common line to prevent disruption of the display.
Power is supplied to controller but
the purger does not turn on
Blown fuse Replace fuse on common (L1) terminal block.
Poor connection on common/neutral
the inputs
Check common/neutral connections into junction box.
Improper wiring Ensure that common/neutral wiring matches the wiring diagram.
Faulty controller Replace controller assembly.
High temperature Oil built up in the heat exchanger
Drain oil from the heat exchanger. Follow maintenance procedures located in this
bulletin.
Data communication failure
Make sure USB interface connection is correct.
Make sure RS-485/RS-422 output interface connection is correct.
Make sure power supply is OK.
Make sure the wire terminal connection is OK.
Make sure the pilot lamp flashes when receiving.
Make sure the pilot lamp flashes when sending.
Data missing or incorrect
Check to see whether if the data rate and format at both ends of the communication
equipment are consistent.
Service Pointers Continued