Troubleshooting
RT-SVX23M-EN
63
Unit Economizer Control (ECA)
Troubleshooting ReliaTel Control
Verify Economizer Status by Economizer Actuator (ECA)
LED indicator:
OFF: No Power or Failure
ON: Normal, OK to Economize
Slow Flash: Normal, not OK to Economize
Fast Flash - 1/2 Second On / 2 Seconds Off:
Error Code:
Communications Failure
Pulse Flash: 2 Seconds On / 1/2 Second Off:
Error Code:
1 Flash: Actuator Fault
2 Flashes:CO2 Sensor
3 Flashes: RA Humidity Sensor
4 Flashes: RA Temp Sensor
5 Flashes: OA Quality Sensor
6 Flashes: OA Humidity Sensor
7 Flashes: OA Temp Sensor
8 Flashes: MA Temp Sensor
9 Flashes: RAM Fault
10 Flashes: ROM Fault
11 Flashes: EEPROM F
Mixed Air Temperature Low Limit
Diagnostic
In all conditions on all ReliaTel™ controlled units, if the
mixed air temperature falls below 45F, the mixed air
temperature low limit diagnostic is active and the
economizer actuator will close to the active minimum
position. On Title 24 compliant units, ReliaTel™ will set an
auto-reset diagnostic to be used by BAS and TD-5 when
the mixed air temperature low limit is active.
The RTEM will revert to normal operation when the mixed
air temperature rises above 48F. The diagnostic will be
reset when the mixed air temperature low limit is inactive.
Troubleshooting Procedures for
Direct Drive Plenum Fan
Prior to troubleshooting, verify all wiring and wiring
connections. The motor has internal protections that will
shut down the motor before damage occurs. A power
cycle is required to reset some of the internal protections.
Before proceeding, power down unit for 1 minute and then
power on.
Please follow steps sequentially unless directed differently
in solution.
Refer to RT-SVB90*-EN for a comprehensive
troubleshooting guide.
Summary of Contents for Precedent WSC072E
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