Bryant R-22 Spezifikationen PDF herunterladen (Seite 37)

SSP-SVX15C-EN

Test 4 - LED Indicator Test (SYS ON,

HEAT, & COOL)

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Method 1

Testing the LED using a meter with diode test function.

Test both forward and reverse bias. Forward bias

should measure a voltage drop of 1.5 to 2.5 volts,

depending on your meter. Reverse bias will show an

Over Load, or open circuit indication if LED is

functional.

Method 2

Testing the LED with an analog Ohmmeter. Connect

Ohmmeter across LED in one direction, then reverse

the leads for the opposite direction. The LED should

have at least 100 times more resistance in reverse

direction, as compared with the forward direction. If

high resistance in both directions, LED is open. If low in

both directions, LED is shorted.

Method 3

To test LED’s with ZSM connected to unit, test voltages

at LED terminals on ZSM. A measurement of 32 VDC,

across an unlit LED, means the LED has failed.

IImmppoorrttaanntt:: Measurements should be made from LED

common (ZSM terminal 6 to respective LED

terminal).

Programmable & Digital Zone

Sensor Test

Testing Serial Communication Voltage

1. Verify 24 VAC is present between terminals J6-14 &

J6-11.

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ccoommppoonneennttss,, hhaavvee aa qquuaalliiffiieedd lliicceennsseedd eelleeccttrriicciiaann

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2. Disconnect wires from J6-11 and J6-12. Measure

the voltage between J6-11 and J6-12, should be

about 32 VDC.

3. Reconnect wires to terminals J6-11 and J6-12.

Measure voltage again between J6-11 and J6-12,

voltage should flash high and low every 0.5

seconds. The voltage on the low end will measure

about 19 VDC, while the voltage on the high end

will measure from approximately 24 to 38 VDC.

4. Verify all modes of operation, by running the unit

through all of the steps in ”Service Test Modes for

ReliaTel Controls,” p. 33.

5. After verifying proper unit operation, exit the test

mode. Turn the fan on continuously at the ZSM, by

pressing the button with the fan symbol. If the fan

comes on and runs continuously, the ZSM is good.

If you are not able to turn the fan on, the ZSM is

defective.

RLCI Loss of Communications

If the RLCI loses input from the building management

system, the RTRM will control in the default mode after

approximately 15 minutes. If the RTRM loses the

Heating and Cooling setpoint input, the RTRM will

control in the default mode instantaneously. The

temperature sensing thermistor in the Zone Sensor

Module is the only component required for the

““DDeeffaauulltt MMooddee”” to operate.

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