Aircommand IBIS ROOFTOP CARAVAN Manual - Airconditioner
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TECHNICAL MANUAL for IBIS ROOFTOP CARAVAN
AIRCONDITIONER
ERROR CODES & THEIR MEANING:
E1: Room sensor fault.
Usually a faulty connection (plug), damaged lead or a faulty sensor
itself.
Action: Check
White
plug is connected on main board.
Check resistance of thermistor & cable by measuring
with a multimeter. 10K ohm @25C. See fig 19 and table 1.
If open circuit or out of calibration, replace.
E2: Inside coil sensor fault: Usually a faulty connection (2 plugs)
Damaged lead or faulty sensor.
Action: Check
Yellow
plug is connected on the main board. And also plug in
bundled wiring near the coil.
Check resistance of thermistor & cable by measuring
with a multimeter. 10K ohm @25C. See fig 19 and table 1.
If open circuit or out of calibration, replace.
When replacing this thermistor, install such that cable is downward from
the copper pocket on the coil. See fig 18
E3: Outside coil sensor fault Usually a faulty connection (2 plugs), damaged lead or
faulty
sensor.
Action: Check
Red
plug on main board and extension plug in
bundled wiring usually located near capillary tube coils.
Check resistance of thermistor & cable by measuring
with a multimeter. 10K ohm at 25C. See fig 19 and table 1.
If open circuit or out of calibration, replace.
E4: Indicates lack of refrigerant, or the compressor is not running, or the thermistor is out of
calibration.
Action:
Check that the compressor is running by listening.
If it is apparent that the compressor is running, then check the
temperature difference across the evaporator.
i.e. Measure temperature of return air at inlet filters and
measure temp. of discharge air at grilles. This temp diff.
should be 14 to 18 C. with fan on hi speed. If temp diff. is less than this,
suspect lack of refrigerant.
Fit a suction gauge to access valve at rear of unit. See fig 12. On a 35C
outside temp. then suction should be 380 to 450Kpa.