Carrier 50TJ016-028 Installation, Start-Up And Service Instructions Manual page 29

Pressing the CONFIG button for more than three seconds,
but less than ten seconds and then releasing will start the auto-
matic test procedure. The damper will modulate fully open,
wait, and modulate closed. This process takes three minutes to
complete. Use this feature to determine if the actuator can be
commanded.
If the CONFIG button is pressed and held for ten seconds
and less than 30 seconds then released, the EconoMi$er con-
troller reconfigures its mode of operation based on the sensors
that are connected and functioning normally, and cancels the
automatic test procedure.
If the EconoMi$er controller recognized a non-critical
sensor fault, and flashed a code (i.e., FLASH 6, outdoor air
humidity sensor fault) the FLASH CODE will be cleared, and
normal operation begins. Ensure faulty sensor is removed
before clearing faults.
If the EconoMi$er controller recognizes a critical sensor
fault, and flashes a code (i.e., FLASH 4, discharge air thermo-
stat fault) the FLASH code will not be cleared, and the
EconoMi$er will remain in the safe operation mode. The
sensor fault must be corrected to enable EconoMi$er to revert
to normal operation.
If the CONFIG button is pressed and held for more than
30 seconds and released, the EconoMi$er controller will enable
the enthalpy comparison strategy (with outdoor air enthalpy
and return air enthalpy sensors installed).
Power Failure —
Dampers have a spring return. In event
of power failure, dampers will return to fully closed position
until power is restored. Do not manually operate damper
motor.
Refrigerant Charge —
listed on unit nameplate and in Table 1. Refer to Carrier
GTAC II; Module 5; Charging, Recovery, Recycling, and Rec-
lamation section for charging methods and procedures. Unit
panels must be in place when unit is operating during charging
procedure.
NOTE: Do not use recycled refrigerant as it may contain con-
taminants.
Table 20 — EconoMi$er Control Module Flash Code Identification
FLASH CODE
Constant On Normal operation
No power
Constant Off
Continuous CONFIG button pushed and held
Flash between 3 and 9 seconds
Flash One Control board fault
Flash Two Thermostat fault (i.e., Y2 without Y1)
Flash Three Actuator fault
Flash Four Discharge air thermistor fault
Flash Five Outdoor air temperature sensor fault
Flash Six Outdoor air humidity sensor fault
Return air temperature sensor fault
Flash Seven
Flash Eight Return air humidity sensor fault
Flash Nine Carbon Dioxide (CO
Flash Ten Onboard adjustment potentiometer fault
Amount of refrigerant charge is
CAUSE
) sensor fault
2
NO CHARGE — Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refriger-
ant (refer to Tables 1A and 1B).
LOW CHARGE COOLING — Using cooling charging chart
(see Fig. 42 and 43), add or remove refrigerant until conditions
of the chart are met. Note that charging chart is different
from those normally used. An accurate pressure gage and
temperature-sensing device is required. Charging is accom-
plished by ensuring the proper amount of liquid subcooling.
Measure liquid line pressure at the liquid line service valve us-
ing pressure gage. Connect temperature sensing device to the
liquid line near the liquid line service valve and insulate it so
that outdoor ambient temperature does not affect reading.
TO USE THE COOLING CHARGING CHART — Use the
above temperature and pressure readings, and find the intersec-
tion point on the cooling charging chart. If intersection point on
chart is above line, add refrigerant. If intersection point on
chart is below line, carefully recover some of the charge. Re-
check suction pressure as charge is adjusted.
NOTE: Indoor-air CFM must be within normal operating
range of unit. All outdoor fans must be operating.
The TXV (thermostatic expansion valve) is set to maintain
between 15 and 20 degrees of superheat at the compressors.
The valves are factory set and should not require re-adjustment.
MOISTUREMISER SYSTEM CHARGING — The system
charge for units with the MoistureMiser option is greater than
that of the standard unit alone. The charge for units with this
option is indicated on the unit nameplate drawing. To charge
systems using the MoistureMiser Dehumidification package,
fully evacuate, recover, and re-charge the system to the name-
plate specified charge level. To check or adjust refrigerant
charge on systems using the MoistureMiser Dehumidification
package, charge per the standard subcooling charts. The sub-
cooler MUST be deenergized to use the charging charts. The
charts reference a liquid pressure (psig) and temperature at a
point between the condenser coil and the subcooler coil. A tap
is provided on the unit to measure liquid pressure entering the
subcooler (leaving the condenser).
ACTION TAKEN BY ECONOMI$ER
Normal operation.
No operation.
Outdoor air damper is stroked fully open, then closed
(automatic test procedure takes 3 minutes to complete).
System shutdown.
System shutdown until corrected.
Revert to mechanical cooling only.
Continue operation with damper at minimum position.
Revert to mechanical cooling only.
Continue operation with damper at minimum position.
Disable mechanical cooling lockout.
Continue operation with dry bulb or dry bulb differential switchover.
Continue operation with single enthalpy EconoMi$er
switchover or dry bulb EconoMi$er switchover (without
humidity sensor).
Continue operation with single enthalpy, differential dry
bulb, or dry bulb EconoMi$er switchover.
Continue operation without ventilation control.
Continue operation with default potentiometer settings.
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