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Error code E1: Communication error between indoor unit and outdoor unit
Switch off power to the system for 1 minute, re-
establish power supply
, start system
YES
Is the communication line correctly wired?
NO
Correctly wire communication line
YES
Has shielded cable been used?
NO
Use shielded cable
YES
Is a fixed resistor (120 Ohm) installed on the
last indoor unit in the series?
NO
Install fixed resistor (120 Ohm) on the last
indoor unit in the series
YES
Is the power supply to all units OK?
NO
Ensure correct power supply
YES
Check the circuit board on the indoor unit or
outdoor unit and replace if necessary
Error code E2: Fault with T1 probe, ambient air
Is the probe correctly mounted on the circuit
board?
NO
Correctly mount the probe on the circuit board
YES
Is the probe visibly damaged?
YES
Replace probe
NO
Are the probe resistance values OK?
(
Ä
on page 40)
NO
Replace probe
YES
Replace indoor unit circuit board
37
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