UAB AMALVA we reserve the right to make changes without prior notice.
57
7.9. Troubleshooting
If the unit is not working:
•
Make sure if the unit is connected to the electrical power supply.
•
Check if the unit main switch is on (if designed).
•
Check all control block fuses. If needed, change failed fuses with the new ones that are the same electrical
parameters as old ones (fuses types are shown in wiring diagrams).
• Check if there is not failure indication on the control panel. If there is indication, it needs to be eliminated first. To
eliminate failure use 7.9 Table, which describes failures.
•
If nothing is indicating on control panel, check whether cable connecting control panel with the unit is not damaged.
7.9 Table
Failures indicated on the control panel, possible reasons and it elimination
Message
LED
Possible Failure Cause
Failure Elimination
Red and
green
blinking
Supply air filter is clogged.
After unit is off, it is necessary to change
filter.
Red and
green
blinking
Exhaust air filter is clogged.
After unit is off, it is necessary to change
filter.
Red light
Supply air temperature dropped
lower allowable level.
Check program settings, unit heat
exchanger and heater operation.
Red light
Supply air temperature is higher
allowable level.
Check program settings, unit heat
exchanger and heater operation.
Red light
Supply air fan motor
overheated due to excessive load.
Check if air filters are inserted, if the unit
doors are closed, if unit ventilation system
has been installed correctly.
Red light
Exhaust air fan overheated due to
excessive load.
Check if air filters are inserted, if the unit
doors are closed, if unit ventilation system
has been installed correctly.
Red and
green
blinking
Heater is disconnected due to low
air flow.
When heater cools down, protection res-
tores automatically. It is recommended to
increase ventilation intensity level.
Red light
Electric heater overheating
protection is on.
To restore protection, it is possible only
after pressing “RESET” button, which is
located on the heater.
Red light
Return water temperature in water
heater dropped lower allowable
level.
Check circulation pump and heating
system condition, heating valve actuator
performance.
Red light
Temperature of the air passing
through plate heat exchanger,
dropped lower allowable level.
Check by-pass damper condition and
actuator performance. It is recommended
to decrease ventilation level.
Red light
The belt is broken, or failure of the
rotor motor.
Check rotor drive and rotation
sensor condition.
Red light
Received fire alarm signal from the
building fire system.
When fire alarm signal disappears, unit
needs to be restarted from control panel.
Red light
Supply air temperature sensor is
not connected or broken down.
It is necessary to check sensor
connections or change the sensor.
Red light
Exhaust air temperature sensor is
not connected or broken down.
It is necessary to check sensor
connections or change the sensor.
Содержание KOMPAKT OTK Series
Страница 2: ......