Reliatel Economizer Control Actuator (Led Fault Code Info.); Actuator Fault (Honeywell); Actuator Fault (Rtem); Sensor Faults - Trane ReliaTel Diagnostic Manual

ReliaTel Economizer Control Actuator (LED Fault Code
Info.)

Actuator Fault (Honeywell)

An actuator fault will occur when the economizer position signal to the actuator is 25% different
than the feedback signal from the actuator. Example: if the economizer is not attached to the motor,
you would get an actuator fault only after the economizer would tell the motor to drive to at least
25% open.

Actuator Fault (RTEM)

An actuator fault will occur when the economizer position signal to the actuator is 10% different
than the feedback signal from the actuator for 4 continuous minutes. Example: if the economizer
is not attached to the motor, you would get an actuator fault only after the economizer would tell
the motor to drive to at least 10% open for at least 4 minutes.

Sensor Faults

A sensor fault will occur if a sensor fails during normal operation. When power is freshly applied
to the unit, the ECA and RTEM recognize which sensors are installed. Example: if only the MAT is
hooked up, the economizer control action will be dry bulb. If the OAH/OAE and MAT are hooked
up, the economizer control action will be in Reference Enthalpy.
If after power up one of the connected sensors is disconnected, the economizer should indicate a
fault.
Note: The actuator has an internal potentiometer that reports the actual damper position. Should
The mixed air sensor (MAS) and outdoor air sensor (OAS) input from the RTRM are minimum
required sensors.
If a CO
The flash codes are prioritized. The higher the flash count, the more priority the fault has. If there
is more than one fault, only the higher priority fault will flash.
The green system LED is located near the center of the Honeywell ECA Module and in the corner
of the RTEM.
On: OK to economize
Slow flash: Not OK to economize
½ second on, 2 seconds off: no communication
OFF: No power or system failure
Error codes — ½ second on, ¼ second off
1 flash — Actuator fault
2 flash — CO2 sensor
3 flash — RA humidity sensor
4 flash — RA temp sensor
6 flash — OA humidity sensor
7 flash — No communication with RTRM at power-up, loss of communication with RTRM, or no
reading from the outdoor air sensor (OAS) in the condenser section
8 flash — MA temp sensor
9-11 flash — Internal fault (Honeywell only)
Modbus Communication voltage when measured at ECA — J17-1 and J17-2 (MBUS +/-) will read
approximately 0.5 - 2.0 vdc (flashing)
108
the linkage become bound, the actuator may report an unexpected output to a BAS output
(Tracer, Tracker, CCP).
sensor is not hooked up, the economizer will not look for it and will not fault.
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