Bard TCS22-***-003

2100-444-003A

Page 85

will correspond with the Humidity

according to Table 7.

Discharge Air Sensor #1 or #2 Check Sensor Output Determine the Temperature of the

discharge air. Remove plug in connector

J2 from the TCS22 controller. With a

Digital VOM, check the resistance

between Terminal #4 and Terminal #5

on the low voltage terminal block of the

A/C unit. The resistance will

correspond with the Temperature of the

sensor according to Table 6.

Dirty Filter Sensor #1 or #2 Check Output Remove plug in connector J2 from the

TCS22 controller. Observe Filter flag

status of the A/C unit. If the Change

Filter flag is not visible, then there

should be no continuity between

terminals #6 and #7 of the A/C unit low

voltage terminal block. If the Change

Filter flag is visible, then there should be

continuity between terminals #6 and #7

of the A/C unit. voltage terminal block.

Compressor Current Sensor

#1 or #2 Check Sensor Output Remove plug in connectors J1, J2 and J4

from the TCS22 controller. Connect a

jumper wire between R and G of the

A/C unit low voltage terminal block to

operate the blower. Observe the status

of the compressor current sensor LED.

The LED should not be on. Connect a

jumper wire between R and Y of the

A/C unit low voltage terminal block to

operate the compressor. When the

compressor is running, the LED should

flash rapidly (Approx. 4 times per

second). If the Led is flashing slowly

(Approx. 2 times per second), adjust

potentiometer on the sensor until the

LED begins flashing rapidly when

compressor is running.

Blower Airflow Sensor #1 or

#2 Check Sensor Output Remove plug in connectors J1, J2 and J4

from the TCS22 controller. Check

continuity between terminal #8 and #9

of the A/C unit low voltage terminal

block. This should be an Open circuit

with the Blower off. Connect a