UAB AMALVA we reserve the right to make changes without prior notice
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C3-16-01-v1
2.8. Unit PC control
This is additionally ordered function and for it implementation special network module “Ping2” is provided.
Connection diagrams and installation requirements of network module are given in the “Ping2” module instal-
lation manual.
After connecting units through special network modules to computer network or Internet and given an IP
address, integrated web server allows the operator from his computer not only to monitor, but also to control
air handling units operation: to turn on/off, change ventilation intensity and etc. It also allows indicating failures.
2.9. 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.
2.9 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 al-
lowable 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 restores
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.
Summary of Contents for C3
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