Bedienungsanleitung REMKO KWG750 (Seite 18 von 60) (Englisch)

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This unit was manufactured using the latest production methods and tested repeatedly for perfect function.

If malfunctions still occur, please check the list according to the list below. In case of systems with indoor and

outdoor units, the "Troubleshooting and customer service" chapters in both operating instructions must be ob-

served. If all functional checks have been performed and the unit is still not functioning perfectly, please notify

your closest dealer.

Troubleshooting and customer service

Malfunction

Please observe the continuation of this fault remedy table on the next page

Fault Code Effect Possible cause Remedy

The

unit does

not start

The display does not light up. No power supply

Check the power connections at the

general supply terminals and check the

voltage values.

Check the fuses on the secondary side

of the additional transformer.

APS /

ASPh

The phase sequence relay does

not switch through.

Incorrect phase sequence.

The phase sequence relay

KA3 does not grant an

enable.

- LED not active.

Exchange the external conductor of the

power supply on the terminal strip on

the control panel.

The display is lit, but the unit

does not start.

Unit in standby

See the "Button functions" section for

the activation of the system.

OFF

The display indicates "OFF." No external enable

Check the connection to Terminals 2-3

(external enable).

The unit does not start and

the compressor symbol ﬂashes

on the display.

Start-up delay

Wait until the start-up delay is over

(max. 360 sec.), after which the

compressor should start

The lower display ﬂashes

and alternatively shows an

alphanumerical code and the

temperature value.

One or more of the

safety devices reacted

Check which safety device has reacted,

remedy the cause of fault, and reset the

safety device (see "Resetting faults")

C(n)tr

Compressor contactor defec-

tive, overcurrent protection

switch;

compressor reacted.

Does the compressor

symbol light up and is the

contactor energised?

Have the contactor or compressor

exchanged by a specialist company.

The unit

works

at a

reduced

cooling/

heating

capacity

The thermal load was in-

creased in the cooling mode.

Has a structural change

been made?

Observe safety distances.

C: Inlet ﬂow temperature too

high.

H: Inlet ﬂow temperature too

low.

Does the inlet ﬂow

temperature amount to

about C = 5 - 10°C,

H = 35 - 50°C?

Reduce (C) or increase (H) the return

temperature.

Air in the medium circuit.

Have automatic bleed-

ers been installed at the

highest point?

Bleed manually or install an automatic

bleeder.

Condensation temperature too

high.

Are the ﬁns clean and

have the operating limits

been observed?

Clean the ﬁns, shade the unit, and ob-

serve the operating limits.

Incorrect parameter setting. Check the setting. Change the settings.

Inching mode due to low

demand.

Is the system oversized?

Increase the medium volume ﬂow rate

by installing a storage tank.

Medium

outlet

Pipe leakage or insulation

defects.

Is leakage present and

are all lines insulated?

Seal off and insulate.

Thawing phase during heating

mode.

Is the heating mode set? Normal operating state.

REMKO KWG

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REMKO KWG750 Seite 18

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