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Troubleshooting
It is important that any work performed on this unit is
carried out by a qualifi ed service technician. Work by an
unqualifi ed technician can be extremely hazardous and
may result in property damage and/or personal injury.
This Aircommand air conditioner will display an error code
on the control panel when it senses a fault. The error codes
shown below are for reference purposes only. When your
unit displays any of these codes we suggest you contact
Aircommand Australia or an authorised service agent for
assistance.
E1: ROOM SENSOR FAULT
Possibly a faulty connection (plug), damaged lead or a faulty
sensor itself.
E2: INSIDE COIL SENSOR FAULT
Possibly a faulty connection (2 plugs), damaged lead or faulty
sensor.
E3: OUTSIDE COIL SENSOR FAULT
Possibly a faulty connection (2 plugs), damaged lead or faulty
sensor.
E4: INDICATES LACK OF REFRIGERANT BEING PUMPED
THROUGH THE SYSTEM
Possibly gas leaked from system through severed/cracked pipe,
or the compressor is not running or the thermistor is out of
calibration.
E5: INDICATES EXCESSIVE TEMPERATURE
Excessive temperature of the outside coil if on cooling, or
excessive temperature of the inside coil in heat mode.
On cooling, the E5 will appear if the outside coil temperature
exceeds 68
O
C. This is an indication of condenser airfl ow
reduced or non-existent or condensor fan not working
suffi ciently or the thermistor is out of calibration.
NB: When in heat mode, at outside temperatures above 18
the outside fan motors may cycle on and off.
This is the system-shedding load to avoid overheating the
inside coil and is not a fault.
E6 & E7 ARE NOT UTILISED IN THIS SYSTEM.
If either of these codes appear, the main control board needs
to be replaced.
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When attempting to diagnose a fault through our service
department please have the answers to as many of the
following questions as possible:
1. Is there, or have there been, any error codes displayed?
2. Does the display board appear normal?
Are temperatures displayed from 16 to 30
3. In heating or cooling modes can the temperatures be
altered via the up/down buttons from 16 to 30
4. Is the display showing '0'?
5. Is the display showing an unusual fi gure?
6. When the unit is set to 'FAN' only, does the inside fan have
3 speeds?
Does the inside fan blow air?
7. Can the compressor be heard running?
If the unit is being operated on a generator, a '0' or any other
unusual display occurs, this indicates a problem with the sine
wave ouput from the generator assuming the unit is OK on
mains power.
O
C,
O
C?
O
C?