EN
26
UAB AMALVA we reserve the right to make changes without prior notice.
2.9 Table
Failures indicated on the control panel, possible reasons and it elimination
Failure
indication
Unit type
Protection tripping
description
Possible failure cause
Failure elimination
Blinks 3
times per
second
Unit with
rotary heat
exchanger
When there is no signal from
the rotor’s rotation sensor, if the
“Winter” season is set, the unit
will stop operating in 2 min. And
if “Summer” season is set, unit
will continue operating.
The belt is broken, failure
of the rotor motor or rotor
sensor.
Check rotor drive and rotation
sensor condition.
Unit with
plate heat
exchanger
If the freezing protection of the
heat exchanger is activated and
is not restored the unit will stop
operating.
Temperature of the air
passing through plate heat
exchanger, dropped lower
allowable level.
Check by-pass damper condition
and actuator perfor-mance. It is
recommended to decrease ventila
-
tion level.
Blinks 3
times per
second
Unit with
electric
heater
Unit with electric heater has
emergency protection from
overheating at 70°C with auto
-
matic reset and at 100°C with
manual reset.
Heater is disconnected
due to low air flow.
When heater cools down, protec
-
tion restores automatically. It is
recommended to increase ventila
-
tion intensity level.
Electric heater overheating
protection is on.
It is possible to restore emergency
overheating protection with button
“RESET” (located on the heater),
only if before heater overheating
cause has been clarified and elimi
-
nated.
Unit with
water
heater
In the unit with water heater,
when the water temperature
falls below the permitted value
of +10°C, the unit will stop op
-
erating.
Failure of the hot water
preparation and supply
function in the heating
system.
Check circulation pump and heat
-
ing system condition, heating valve
actuator performance.
Blinks 8
times per
second
Independ
-
ent of unit
type
If the supply air temperature
is not of the permitted values:
+5°C …-+45°C, unit will stop
operating with 10 min. delay.
When temperature exceeds
the maximum permitted limits:
-30°C...+75°C, the unit stops op
-
erating immediately.
The supplied air is too cold
or too hot.
Check temperature and season set
-
tings. Check the heat exchanger
and heater operation.
Supply air temperature sen
-
sor is not connected or bro
-
ken down.
It is necessary to check sensor con
-
nections or change the sensor.
+
Blinks
every
second
Independ
-
ent of unit
type
Depending on the intensity of
unit operation, at a certain time a
periodic inspection message ap
-
pears on the control panel.
---
After disconnecting the unit from
power supply, it is necessary to carry
out periodic inspection of the unit, i.e.
to check the air filter clogging and the
condition of the heat exchanger, the
heater and fans.
Summary of Contents for Domekt RECU
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