15
Table 6 — Flash Code Identification
Refer to Table 7 for troubleshooting the EconoMi$er system.
Table 7 — Troubleshooting
(continued on next page)
FLASH CODE
CAUSE
ACTION TAKEN BY ECONOMI$ER
Constant On
Normal operation
Normal operation.
Constant Off
No power
No operation.
Continuous
Flash
CONFIG button pushed and held
between 3 and 9 seconds
Outdoor air damper is stroked fully open, then closed
(automatic test procedure takes 3 minutes to complete).
Cri
ti
cal
F
a
u
lt
Flash One
Control board fault
System shutdown.
Flash Two
Thermostat fault (i.e., Y2 without Y1)
System shutdown until corrected.
Flash Three
Actuator fault
Revert to mechanical cooling only.
Flash Four
Supply air temperature sensor fault
Continue operation with damper at minimum position.
Revert to mechanical cooling only.
Flash Five
Outdoor air temperature sensor fault
Continue operation with damper at minimum position.
Disable mechanical cooling lockout.
Non
-Cri
tical
F
a
ul
t
Flash Six
Outdoor air humidity sensor fault
Continue operation with dry bulb or dry bulb differential switchover.
Flash Seven
Return air temperature sensor fault
Continue operation with single enthalpy EconoMi$er
switchover or dry bulb EconoMi$er switchover (without
humidity sensor).
Flash Eight
Return air humidity sensor fault
Continue operation with single enthalpy, differential dry
bulb, or dry bulb EconoMi$er switchover.
Flash Nine
Carbon Dioxide (CO
2
) sensor fault
Continue operation without ventilation control.
Flash Ten
Onboard adjustment potentiometer fault
Continue operation with default potentiometer settings.
PROBLEM
CAUSE
REMEDY
Damper Does Not
Open
Indoor (Evaporator) Fan
Off
Check to ensure that 24 VAC is present at Terminal C1 (Common Power)
on the Indoor Evaporator Fan Contactor (IFC) or that 24 VAC is present at
the Indoor Evaporator Fan On (IFO) terminal.
Check whether 24 VAC is present at Plug PL6-1 (red wire) and/or PL6-3 (black
wire). If 24 VAC is not present, check wiring. (See unit label diagram.)
Check proper thermostat connection to G on the connection board.
No Power to EconoMi$er
Controller
Check to ensure that 24 VAC is present across Terminals 24 VAC and
24 VAC COM on the EconoMi$er control. If 24 VAC is not present, check wiring.
(See rooftop unit label diagram). If 24 VAC is present, STATUS light should be on
constantly.
No Power to G Terminal
If IFM is on, check to ensure 24 VAC is present on G Terminal of the
EconoMi$er controller. If 24 VAC is not present, check wiring. (See unit
label diagram.)
Controller Fault
If STATUS light is flashing one flash, the EconoMi$er controller is
experiencing a fault condition. Cycle power to the controller. If condition
continues, replace the EconoMi$er controller.
Thermostat Fault
If STATUS light is flashing two flashes, the EconoMi$er controller senses
the thermostat is wired incorrectly. Check wiring between the thermostat
and the connection board in the electrical panel. The fault condition is
caused by Y2 being energized before Y1.
Actuator Fault
Check the wiring between the EconoMi$er controller and the actuator. Hold CON-
FIG button between 3 and 10 seconds to verify actuator operation. (This process
takes 3 minutes to complete.) STATUS light should flash continuously during test.
Actuator will stroke open, then close.
Check output signal at AO and COM on EconoMi$er controller. If 0 VDC is
present, the actuator should be closed. If something between 0 to 10 VDC is
present, the actuator should be open proportional to signal. At 10 VDC, the actua-
tor should be full open. If actuator does not respond to the signal, check the wiring.
(See unit label diagram.) If wiring is correct, replace the actuator.
