Carel UU02 - Troubleshooting

34
ENG
“humiSonic ventilation” +0300063EN - rel. 1.0 - 16.02.2016
Source “Slave”
electr. panel
“Master” electrical
panel
Cause Solution Alarm relay
activation
Action Reset
“Master”
panel
-
H
_________________
High humidity
The signal from the probe
indicates a humidity higher
than 80%rH
Check humidity probe signal/cable yes signal only AUTO
“Master”
panel
-
H
_________________
Low humidity
The signal from the probe
indicates a humidity lower
than 20%rH
Check humidity probe signal/cable yes signal only AUTO
Humidifi er
2 slow
fl ashes
EE
_________________
EEPROM alarm
EEPROM problems If the problem persists, contact the
CAREL service centre
yes humidifi cation
stopped
If the fault persists,
contact service
Humidifi er 1 fast fl ash
E0
_________________
Remote unit
Functional test not complete
in the factory / EEPROM
problems
If the problem persists, contact the
CAREL service centre
yes humidifi cation
stopped
If the fault persists,
contact service
Humidifi er 8 fast fl ashes
EL
_________________
Water level alarm
Level too high during
atomised water production
due to:
• fi ll SV leaks
• transducer malfunction
Check:
• fi ll SV
• transducers
yes humidifi cation
stopped
AUTO
“Master”
panel
-
Offl ine
_________________
Remote unit offl ine
The panel does not detect
communication with the
remote unit
Check:
• serial connection cable
• power cable
yes humidifi cation
stopped
AUTO
Tab. 9.a
9.2 Troubleshooting
Note: if the problem identifi ed cannot be solved using the following
guide, contact CAREL technical service.
1. Firstly, check the humidifi er and the surrounding area.
Problem Cause Check Solution
No atomised water
production
Power supply Humidifi er switch in the OFF position Check the switch Switch ON
No power Measure the voltage at the humidifi er input
terminals
Connect power
Power supply fault Measure the voltage at the power supply
output terminals
Replace the power supply
Feedwater system Valve closed upstream Check Open the valve
The quantity of
atomised water is
too low
Power supply Low power supply voltage Check the voltage at the power supply output
terminals
Replace the power supply, if
damaged
Feedwater system Water level during production is too high and
overfl owing
Check visually See table 2)
Other The humidifi er is not installed horizontally Check visually Adjust
No atomised water
production
Dust and foreign matter accumulated in the tank (*) Clean the inside of the tank
Transducer deterioration The average life of the transducer is around
10,000 to 15,000 operating hours
Replace
The quantity of
atomised water is
too low
Dust and foreign matter accumulated in the tank (*) Visually check the inside of the tank Clean the inside of the tank
and replace the transducers
Scale build-up on the surface of the piezoelectric transducers (*)
Tab. 9.b
(*) These malfunctions can be avoided by carrying out preventive maintenance.
2. If the cause has not been identifi ed with the previous checks, there
may be faulty components. Check the inside of the humidifi er.
Problem Cause Check Solution
No atomised water
production
Feedwater system Float level sensor fault Empty the tank, remove the electronic board
and check continuity of the level sensor
Contact service to replace the level
sensor
Float level sensor blocked Clean the sensor. If normal operation is
not restored, replace
Fill valve fault No water fi lled even when the tank has been
emptied
Replace the valve
Clean the sensor. If normal operation is
not restored, replace
Other The fan cables are loose or
detached
Check connection after removing the
humidifi er cover
Restore correct connection to the
terminals
The quantity of
atomised water is
too low
Water level overfl ow Float level sensor blocked If the water level in the tank reaches the
overfl ow pipe, remove the connector from the
control board and check continuity of the level
sensor
If there is continuity, contact service to
replace the level sensor
Fill valve fault Water is fi lled even after switching off the
appliance
Replace the fi ll valve
Tab. 9.c