Airflow DV 90 SE L 사용 지침 및 유지 관리 매뉴얼 - 페이지 14

{카테고리_이름} Airflow DV 90 SE L에 대한 사용 지침 및 유지 관리 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Airflow DV 90 SE L 15 페이지. Supply and extract air ventilation with heat recovery

페이지 인쇄

TROUBLESHOOTING

SYMPTOM

Outdoor air coming to

the dwelling is cold.

Supply air fan keeps

stopping.

Supply air fan stops and

starts too frequently.

The maintenance reminder

symbol ( ) is displayed and

the unit operates otherwise

normally.

"Exh air sensor faulty"

message is displayed and

the unit is stopped.

"Inp. air sensor faulty"

message is displayed and the

unit is stopped.

"In air sensor faulty" message

is displayed and the unit is

stopped.

"Out air sensor faulty"

message is displayed and the

unit is stopped.

DV 90 SE

REASON

• Air cools down in the attic ducts.

• The heat recovery cell is frozen, which is

why extract air cannot heat outdoor air.

• The post-heating radiator does not work.

• The extract air filter or cell is clogged.

• The initial adjustment of ventilation has not

been done.

• The stopping of the supply air filter is acti-

ve.

NOTE!

If you decrease the setpoint too much, the cell

may freeze. Compare with list item 1.

• The difference between the stopping and

starting temperatures is too small.

• The maintenance reminder lights up the

service reminder symbol in the main

display of the control panel at an interval

of approximately 4 months (factory set-

ting).

• You may change the interval (see the

instructions for using the control panel, sec-

tion 3.3.18).

• There is a fault in the freezing protection

sensor.

• There is a fault in the supply air sensor.

• There is a fault in the extract air sensor.

• There is a fault in the outdoor air sensor.

DO THIS

• Check the insulation of the attic ducts.

• If the heat recovery cell is frozen, check the setpoint for

freeze protection. The setpoint for freeze protection can be

raised by 1 or 2˚C, or the sensor can be bent closer to the

cell, in which case the supply air fan stops earlier (see the

instructions for using the control panel, section 3.3.20).

Thaw the cell before closing the door.

• Check that the filters and the heat recovery cell are clean.

• The fan stops more rarely and the efficiency of the heat

recovery cell gets better when the setpoint is decreased by

1 or 2˚C. (See the instructions for using the control panel,

section 3.3.20.)

• Raise the difference between the stopping and starting tem-

peratures by 1 or 2˚C. It extends the period between stop-

ping and starting. (See the instructions for using the control

panel, section 3.3.19.)

• Check the cleanliness of the filters and the unit. If needed,

clean or replace the filters. Also check the external grille.

• Acknowledge the maintenance reminder symbol to make it

disappear. (See the instructions for using the control panel,

section 3.3.7.)

• Contact a maintenance company. The sensor installation

must be checked and if necessary the sensor replaced.

• Contact a maintenance company. The sensor installation

must be checked and if necessary the sensor replaced.

• Contact a maintenance company. The sensor installation

must be checked and if necessary the sensor replaced.

• Contact a maintenance company. The sensor installation

must be checked and if necessary the sensor replaced.