Thermo Scientific 7165, Operating Manual And Parts List

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Type II Water System 5-7 Thermo Scientific
Section 5
Maintenance and Servicing
Troubleshooting
Message Possible Causes Action
Thermo Scientific TII com-
pletely inactive (pump and dis-
play not operating.)
No electrical power to Thermo
Scientific TII.
Ensure Thermo Scientific TII
power cord is connected to a
live power source and com-
pletely plugged into electrical
outlet as well as power entry
module on the unit. Make sure
on/off switch is in the “I” (on)
position.
Main fuse(s) blown.
Replace the main fuse(s) as
indicated in “Fuse
Replacement.”
Display not connected or
remote display cable is loose.
Check display connection.
Power supply fuse blown
Contact Technical Services
concerning power supply fuse
replacement.
RO system is operating but
no water is exiting out the
atmospheric drain connection. Flush solenoid plugged. Perform a system flush.
No water to unit.
Check the water supply and
connection.
Increase in time required to
replenish reservoir.
Membranes fouled.
Check % rejection rate.
Replace membranes.
Low feed water pressure.
Verify feed water pressure is
30 psi minimum.
Decrease in feed water
temperature.
Install a hot water mixing
valve (D7427) in the feed
water line.
Short DI cartridge pack life.
Cartridge pack is beyond
expiration date.
Check the expiration date.
Cartridge packs begin to lose
capacity after being stored for
2 years from the date of manu-
facture. Replace the cartridge
pack with an unexpired one.
Poor quality feed water.
Check that RO membrane(s) is
functioning properly.
Water usage is too high.
Request H2O Select kit to test
tap water.