Test Procedure, Exit6 | Trane Tracer Unit Ventilator, ZN.520

Troubleshooting

If a two-blink pattern remains after an attempt to clear diagnostics, the diagnostic condition is still present and may affect the manual output test. The diagnostic must then be cleared using another method. (See “Resetting Diagnostics” on

page 54.for more information.)

Test Procedure

The procedure for testing is:

1.Press and hold the Test button for at least two seconds, then

release the button to start the test mode.

2.When manual output test mode begins, the controller turns off all outputs and cali- brates modulating end devices closed.

3.Press the Test button once to advance through the test sequence.

Note: To help ensure accurate testing do not press the test button more than once per second.

Alternatively, the manual output test can be controlled over the communications network by using Rover.

When conducting the manual out- put test via communications net- work, the sequence must start with Step 1 (OFF), as shown in Table 26: Test sequence for non face-and-bypass unit configurations and Table 27: Test se- quence for face-and-bypass unit configura-

tions However, subsequent steps may be conducted in any order.

Table 26: Test sequence for non face-and-bypass unit configurations

DX, or cool or

Face-and-

Electric heat, or

Outdoor air

Generic/

Step

Fan

heat/cool changeover

baseboard

bypass damper

heat valve

damper

valve

heat

J1-1

J1-2

J1-3

J1-5

J1-6

J1-7

J1-8

J1-9

J1-10

J1-11

J1-12

TB4-1

1: Off1

Off

Hydronic: on

Off

EH: off

2: Fan high2

High

Off

3: Fan med3

Off

Med

Off

4: Fan low4

Off

Low

Off

5: Main open,

High

Off

DX on

6: Main close,

DX off, aux

High

Off

open, EH1 on

7: Aux open,

EH1 on, exhaust

High

Exh

Off

fan5

8: Aux close,

EH1 off, EH2 on,

High

Off

damper open

9: Damper close

High

Off

10: Generic /

baseboard heat

High

Off

energized

11: Exit6

Exit

1.Upon entering manual output test mode, the controller turns off all fan, DX, and electric heat outputs and drives all dampers and valves closed (if required).

2.At the beginning of step 2, the controller attempts to clear all diagnostics.

3.If the unit is configured for a 3-speed fan, the medium fan speed output will energize at step 3. If the unit is configured for a 2-speed fan, the fan remains on high speed at step 3.

4.If the unit is configured for a 3-speed fan, the medium fan speed output energizes at step 3. If the unit is configured for a 2-speed fan, the low fan speed output energizes at step 3. If the unit is configured for a 1-speed fan, the fan remains on high speed at step 3.

5.If the unit is configured for a 1- or 2-speed fan, the exhaust fan output energizes on step 7. The exhaust fan output is shared with medium fan speed.

6.After step 10, the test sequence performs an exit. This initiates a reset and attempts to return the controller to normal operation

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Trane Tracer Unit Ventilator, ZN.520 manual Test Procedure, Exit6

Models: Tracer Unit Ventilator ZN.520

Troubleshooting

Test Procedure

11: Exit6