Conspec Controls P2621-NO2/VC Betriebshandbuch - Seite 8

Blättern Sie online oder laden Sie pdf Betriebshandbuch für Controller Conspec Controls P2621-NO2/VC herunter. Conspec Controls P2621-NO2/VC 10 Seiten. Nitrogen dioxide ventilation fan controller

Seite drucken

the power light is off, return the P2621-NO2/VC to your supplier or CONSPEC factory

for repair or rep1acement.

2. The Fan Does Not Operate When Fan Light (yellow light) is ON or

The Fan Does Not Turn OFF When The Fan Light (yellow light) is OFF

Turn OFF the power to the P2621 and to the fan Control system. Check that the field

installed relay in the fan motor circuit is a (NC~ Normally Closed type.) Open the

enclosure and check that the ventilation fan wiring is securely attached to the terminals

K1 and K2, and that the wiring from the Connector terminals to the circuit board is

securely attached. Disconnect the ventilation fan wiring from terminals K1 and K2. Using

an ohmmeter, measure the resistance between terminals K1 and K2. The circuit should be

open (high resistance). If the circuit is not open, return the P2621 to your supplier or

CONSPEC for repair or replacement. Turn on the 24 VAC power to the P2621-NO2/VC

and wait for -FAN- to appear in the display using an ohmmeter, measure the resistance

between terminals K1 and K2. The circuit should be open (high resistance). If the circuit

is not open, return the P2621 to your supplier or to CONSPEC for repair or replacement.

With the 24VAC power to the P2621-NO2/VC turned OFF, wait for - FAN- to disappear

from the display. Using an ohmmeter, measure the resistance between terminals K1 and

K2. The circuit should be closed (low or zero resistance). If the circuit is not closed,

return the P2621-NO2/VC to your supplier or CONSPEC for repair or replacement. If the

above resistance checks between terminals K1 and K2 are fine, turn OFF the 24 VAC

power to the P2621-NO2/VC and reconnect the fan Control wiring. Turn ON the 24 VAC

power to the unit and fan Control system. Check the fan operation. If the fan does not

operate properly the problem is in the ventilation fan Control system or the Connecting

wiring.

3. Fault Light Is ON

Turn OFF the 24 VAC power to the P2621-NO2/VC then turn it ON. If power cycling

does not remove the fault condition turn OFF the 24 VAC power and power to the

ventilation fan Control system. Open the enclosure and check that the connector from the

sensor is attached to the main board. Turn ON the 24 VAC power to the P2621-NO2/VC.

If the above steps do not remove the fault condition, turn OFF the 24 VAC power to the

P2621-NO2/VC and return the unit to your supplier or Conspec for repair or replacement.

The sensor is factory calibrated and the P2621-NO2/VC is ready to install and use. An

optional field calibration kit is available when local regulations require periodic

calibration checks of the sensor. When the sensor is about to fail, the red fail LED will

light intermittently and will light steadily when the sensor fails. If the sensor is not

replaced the P2621 will turn on the fans and go into the fail mode. The plug-in sensor

module must be replaced before the unit can be reset.

Conspec Technical Services: 724-489-8450