Electronic Control; Air And Fluid Tubing - Quincy QSI-90 Instruction Manual

Electronic Control

Prior to attempting any repairs of the
electronic control or related components,
disconnect and lock out all power supplies
to the compressor plus any remote
controllers. Assure yourself that power is
removed from the compressor by checking
for any AC voltage at the line side of the
motor starter.
Replacing the HAT or Transducer
To replace the temperature switch (HAT
probe), remove the probe from the
reservoir. Install a new probe into the
reservoir. Connect the wires of the new
probe to the existing wires. Perform HAT
tests to assure that the system functions
correctly.
To replace the pressure transducer:
The pressure transducer is located at
the minimum pressure check valve.
Remove the connector at the back of the
transducer, replace the transducer and
reinstall the connector.
Replacing Electronic Control
Prior to replacing electronic control, gather
and record information regarding total
running hours, separator hours, air fi lter
hours, fl uid fi lter hours and fl uid service/
sample hours.

Air and Fluid Tubing

Flareless tubing is used in the air piping
to eliminate pipe joints and provide a
cleaner appearance. Replacement tubing
and fi ttings are available; however, special
installation procedures must be followed.
Your authorized distributor has the
necessary instructions and experience to
perform these repairs.
Section V - Servicing
To replace the electronic control, remove
the screws attaching control to the panel.
Remove and discard wire tie-wraps.
NOTICE!
Prior to removing any wiring from the
electronic control, identify individual
wire location. Refer to the electrical
wiring diagram.
Install new electronic control panel and
install wiring in accordance with electrical
wiring diagram. Attach to the panel using
existing hardware. Install new wire tie-
wraps to secure wiring to wire bundle.
Operational Test
Remove tag and lock out tools. Restore
power to unit. If electronic control was
replaced, refer to the Program Setup Menu
to program the replacement electronic
control. Once completed, perform an
operational test to assure unit is operating
correctly.
WARNING!
Failure to install flareless tubing or
fittings correctly may result in the
tubing coming apart under pressure.
Serious injury and property damage
may result.
41