Installation and Maintenance Manual

Replacing ECM Components
UV-SVN02C-EN 107
Circuit Modules Replacement Notes/Work
Instructions
1. Circuit modules are equipped with nylon standoffs
which can either be removed by squeezing the barbs at
the rear of the control panel, or squeezing the latch
above the circuit module. If the latter method is chosen,
the standoffs will be retained on the metal panel. The
new standoffs (affixed to the replacement modules)
can be removed if necessary, so the new module circuit
board can be attached to the retained standoffs.
2. If replacing the ECM engine module, special care
should be taken to avoid electro-static discharge
damage. Please use an ESD protection wrist-strap and
frequently touch a grounded surface (with unit power
off) to discharge any static buildup.
3. Replace connectors carefully onto the appr
opriate
board. For units with a green wire attached to the CSTI
or standard adapter boards, please ensure that the
green wire is attached to the engine board white
connector as shown in Figure 64.
4. Ensure that the new ECM engine controller is
configured to match the ECM engine configuration
label that is present on the unit. It is necessary to
configure the ECM engine board to avoid improper
operation of the unit, discomfort to the end user, and
loud fan operation.
5. Ensure that the CSTI adapter board switches are set
correctly, as indicated on the attached unit schematic
(where applicable).
6. After replacing modules, commission the unit by
performing at a minimum, “Fan Speed Response
Verification,” p. 62.
Softsetting the IMC Address of an ECM
Engine Module
When a blower coil, fan-coil, or unit ventilator application
requires an ECM engine module, the Tracer UC400
requires that the ECM engine module be configured at IMC
address 99. If an engine module is found at an address
other than 99 (as it will be in a field application / hardware
replacement scenario), Tracer TU populates the Expansion
Module box on the Controller Status screen as shown
here.
Figure 63.
Figure 64.
Depress latch to
remove PCB, leaving
standoff attached to
the metal panel.
Green wire attached to
white plug on blue ECM
engine board, and to
quick-connect terminal
on the adapter board.
Figure 65.
UV-SVN02_-EN.book Page 107 Thursday, January 24, 2013 4:48 PM