19
ALARMS AND ERROR CODES
The unit will sound an alarm and display an error code in the event of a malfunction. If the unit is sound-
ing an alarm, note the flashing error code and turn off the unit by pressing the ‘Off’ button. Contact
support at AirGenerate before attempting to turn on the unit. Error codes range from A0 to A8.
Codes A0 to A4 are specific to inbuilt sensors in the unit:
A0:
Upper water temperature sensor (T1) malfunction. Since this sensor controls the primary electric heater, you will not be
able to run the unit in Auto or Heater modes. Switch to Econ mode or activate Back-up heater by following the ‘Activating Back-
up Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A1:
Lower water temperature sensor (T2) malfunction. Since this sensor controls the heat pump, you will not be able to run the
unit in Auto or Econ modes. Switch to Heater mode or activate Back-up heater by following the ‘Activating Back-up Heater’
procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A2:
Evaporator coil temperature sensor (A2) malfunction. Since this sensor affects heat pump performance, you will not be able
to run the unit in Auto or Econ modes. Switch to Heater mode or activate Back-up heater by following the ‘Activating Back-up
Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A3:
Compressor discharge temperature sensor (A3) malfunction. Since this sensor affects heat pump performance, you will not
be able to run the unit in Auto or Econ modes. Switch to Heater mode or activate Back-up heater by following the ‘Activating
Back-up Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A4:
Ambient temperature sensor (A4) malfunction. Since this sensor affects heat pump performance, you will not be able to run
the unit in Auto or Econ modes. Switch to Heater mode or activate Back-up heater by following the ‘Activating Back-up Heater’
procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A5:
Operating pressure outside normal range. Check the following:
1. Ensure that the tank is completely full with water (especially if this is a new install and you are turning the unit on for the
first time). Check this by opening a hot water faucet – water must flow in a steady, uninterrupted manner.
2. If the ambient temperature is close to the low or high ambient temperature operating limit, switch to Heater mode tempo-
rarily. Revert to Auto or Econ mode when ambient temperature has normalized.
3. If the unit is ducted, remove the duct and operate the unit.
4. If the alarm is still not resolved, follow these steps and report findings to AirGenerate support.
a. Deactivate alarm & let the unit run in Econ mode (to de-activate A5 alarm, set parameter F50 to zero)
b. Check amperage (place a clamp meter around one of the live/hot wires)
c. Check exhaust temperature
d. Check evaporator coil temperature (A2) by pressing the ‘Down’ arrow button
e. Check compressor discharge temperature (A3) by pressing ‘Up’ and ‘Down’ arrow keys together.
IMPORTANT: Do not run the unit for more than 15 minutes in Econ mode. After taking these readings, switch to Heat-
er mode again. Re-activate alarm A5 by setting parameter F50 to 1.
f. If AirGenerate support recommends a refrigerant recharge, follow ‘Refrigerant Recharge’ procedure.
AirGenerate support may also request that additional troubleshooting measures or temperature readings be taken.
A6:
Primary electric element over-heating. Switch to Econ mode or activate back-up heater temporarily. Obtain new sensor (T1)
and new primary electric element from Airgenerate. Follow sensor and element replacement procedures.
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Содержание ATI50
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