Maintenance Troubleshooting - Price PCV Series Manual

PRESSURE CONTROL VALVE
MAINTENANCE
Troubleshooting
The following information is provided in the event that the PIC does not appear to function properly after installation.
Fault
PIC controller appears to be not responding or have no power.
Green light on the controller is not blinking. Thermostat green
indication light not on, or LCD screen is blank.
Damper acts erratically
BACnet Communication Errors
Solution
Check thermostat first for either green indication light, or LCD
display. If either of these does not appear, then check the PIC
controller for power (green blinking light). If no power is present,
check 24VAC power with a Multimeter. Cycle power to the controller.
If this doesn't restore power, check the power that is feeding that
controller for your problem
Check actuator mounting; ensure that the damper is fully closed
when the actuator is in the fully closed position. Pivot the grey
release clutch on the actuator and move by hand, ensuring that the
set screw on the damper shaft is torqued down tight and no slipping
is occurring. Ensure the 3 wires in the actuator itself are wired
correctly: green to COM, red to CW, and yellow to CCW.
Ensure the static pressure probe is connected to the HI (RED)
side port of the transducer. Leave the LO (Green side) port of the
transducer open to atmosphere.
BACnet
MS/TP is based on a RS-485 network. It must be wired in a daisy
chain configuration. A daisy chain means that there is only one main
cable, and every network device is connected directly along its path.
DO NOT use Star, Bus, "T", or any other type of network
configuration. Any of these other network configurations will result in
an unreliable network, and make troubleshooting almost impossible.
Correct polarity is imperative on MSTP wiring. Always ensure that the
positive terminal on a device has the same color wire connected to
it throughout the network, same for the negative terminal. Eg. 2 wire
conductor with black and white wires – black to the positive terminal,
and white to the negative terminal. Keep this consistency throughout
the network.
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