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REMKO RXT xxx DC User Manual

Page 37

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2. Timer light flashes at 5 Hz: communication error

between indoor unit and outdoor component

Yes

No

Establish the power
supply.

Is there voltage in the
indoor unit?

Yes

Is the cable connecting
the indoor unit and
outdoor component
properly connected?

Replace the main board
for the indoor unit or
outdoor component

No

Connect the cable
properly.

Is the cable connecting
the indoor unit and
outdoor component
damaged?

Replace the cable.

Yes

No

Is the connecting cable
shielded, and is it
earthed?

No

Use shielded, earthed
cable

Yes

5. Defrost light flashes: system error

Switch the unit into
another mode or
switch the unit off and
then back on again.
Is fault still present?

Switch the unit off an
then back on again.

Yes

3. Alarm light flashes at 1Hz: check for fault on

condenser temperature sensor or for improper

function of outdoor component (for E4, P1 and P2)

Yes

No

Correct sensor line

Connection of sensor
line OK?

Replace temperature
sensor

Yes

No

Resistance of the
sensor OK
(Table 1, P92-94)?

Replace outdoor
component main
board

4. Alarm light flashes at 5Hz:
float switch / condensation pump

No

Replace condensation
pump

Is the condensation
pump working
properly?

Yes

Set cooling mode on
the indoor unit and
allow the system to run
for a few minutes.
Is the fault still present?

Yes

Replace or repair
condensate
drain

Inspect the condensate
drain to see if it is bent.
Is the condensate drain
OK?

Replace the indoor
unit main board.

Yes

No

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