Troubleshooting - Honeywell CSS-O-A300-001 Manual

SOLID CORE AND SPLIT CORE ADJUSTABLE CURRENT "STATUS" SWITCHES
maximum cable diameter of 350 MCM (17.3 mm). See Fig. 9
for use as a digital input to a building management system and
Fig. 10 for use as a pilot relay application.
Fig. 9. Digital circuit
Fig. 10. Analog circuit

TROUBLESHOOTING

Problem
Red LED is on but the current
switch didn't activate.
Red LED didn't turn on and the
current switch didn't activate
Sensor doesn't switch at all,
regardless of current level.
Product Number
CSS-O-A300-001 Greater than 1 Meg ohms
CSS-O-A200-001 Greater than 1 Meg ohms
CSS-C-A300-001 Greater than 1 Meg ohms
CSP-O-A300-001 Greater than 1 Meg ohms
CSP-O-A200-001 Greater than 1 Meg ohms
CSP-C-A300-001 Greater than 1 Meg ohms
CSP-C-A200-001 Greater than 1 Meg ohms
63-2651—1
DIGITAL INPUT #1
BUILDING MANAGEMENT
SYSTEM
M25302
DDC CONTROLLER
DI
(STATUS)
DO
(RELAY COIL OR
CONTACTOR)
RELAY
CONDITIONER
TRANSFORMER
24 VAC COIL
24 VAC COIL
120 VAC
LINE
M23933
Disconnect the wires from the current switch output. Measure the resistance across the
contacts with an Ohmmeter. See Table 2 below for resistance readings for a good unit.
Verify that the conductor you are monitoring is above the adjustable trip point. If the sensor is
monitoring less than the adjustable trip point, looping the wire may be required. See Fig. 5.
Adjustment potentiometer is probably set to its maximum or minimum position. Turn the
potentiometer clockwise all the way and verify if the LED switches from red to green.
Table 2. Resistance Readings For Good Unit.
Resistance if switch is open
Calibration of Adjustable Trip Point
The adjustable current switch has an operating range of 0-250
Amps. Do not exceed! The adjustable current switch comes
with its fifteen-turn adjustable potentiometer set counter-
clockwise to its maximum position. The adjustable
current switch can monitor Under load, Normal load and
Overload conditions, depending on how it's set. The procedure
below is for Normal load condition for part numbers CSS-O-
A300-001 and CSS-O-A200-001.
Normal loads
With power on and the adjustable current switch on the proper
range, turn the fifteen-turn adjustment potentiometer clockwise
until the red LED turns on and stop immediately. The
adjustment switch is now tripped. The adjustable current
switch Hysteresis (Dead Band) is 10% of the trip point typically.
Solution
Approximately 2 ohms
Approximately 2 ohms
Approximately 12 ohms
Approximately 2 ohms
Approximately 2 ohms
Approximately 12 ohms
Approximately 12 ohms
6
Resistance if switch is closed