Trane Tracer ZN510 Installation, Operation, And Programming page 23

Manual Output Testing the Heat
Pump Configurations
The procedure for testing heat pump
configurations is:
1.
Press and hold the Test button
Table 12: Test sequence
Step
1. Off
2. Fan on (At the beginning of step 2, the
controller attempts to clear all diagnostics).
3. Reversing Valve
4. Cool 1
5. Cool 2
6. Compressor(s) off
This stage helps avoid compressor cooling
and heating in sequential steps by turning the
compressors off prior to changing the
reversing valve state.
7. Heat 1
8. Heat 2
9. Outdoor air damper
10. Exit
After the outdoor air damper step, the test
sequence performs the exit step. This
initiates a reset and attempts to return the
controller to normal operation.
Testing the Heat Pump
Configurations
The outputs are not subject to
minimum times during the test
sequence. However, the test
sequence only permits one step per
second which limits output time.
All outputs are exercised regardless
what timer they are or are not
configured for. For example, single
compressor heat pumps function
Troubleshooting
for at least three seconds to
start the test mode.
2.
The test sequence resets
diagnostics and turns off all
outputs.
Fan Reversing Valve
BOP 1 BOP 2
Off Off
On Off
On On
On On
On On
On Off
On Off
On Off
On Off
the same as two compressor units.
For single compressor units, the
cool 2 and heat 2 steps control the
appropriate binary outputs, but do
not affect unit operation.
Reversing valve and damper
outputs cycle independent of
configuration.
23
3.
Press the Test button several
more times (no more than once
per second) to advance through
the test sequence.
Compr 1 Compr 2 Damper
BOP 4 BOP 5
Off Off Closed
Off Off Closed
Off Off Closed
On Off Closed
On On Closed
Off Off Closed
On Off Closed
On On Closed
Off Off Open
Pump Operation for
Systems with ZN510
Loop Controller
During Unoccupied, the pumps will
be but should be energized to
OFF
test compressor operation. The user
must override the pumps either at
the ZN510 Loop Controller or by
pushing the button of the zone
ON
sensor. This will send the units to an
will turn the
occupied bypass, which
pumps on prior to operating
manual output test.
BOP 6