CLIMAVENETA accurate ax Installation - User - Maintenance Manual page 67

FAULT
AMBIENT HUMIDITY
TOO HIGH
AMBIENT HUMIDITY
TOO LOW
LOW OR NO AIR
FLOW
ACCURATE AX - AW - AD - AT - AF
CAUSE
The parameter settings on the
microprocessor controller are not correct.
Latent load higher than expected
The compressor isn't working during the
dehumidification phase.
The dehumidification valve doesn't close.
The control system isn't working.
The parameter settings on the microprocessor
controller are not correct.
Latent load lower than expected.
The humidifier isn't working.
The control system isn't working.
The fans are not powered.
The filters are blocked (possible activation of
the dirty filter alarm).
Obstructions to the air flow.
The fan thermal cutout has tripped.
EC radial fan speed set too low
Excessive pressure drop in the air distribution
system.
SOLUTION
See the controller manual.
Check and calculate the latent load; check the
flow-rate and the conditions of the outside air;
check the inflow of outside air.
See "THE COMPRESSOR/COMPRESSORS
DON'T START".
Check the operation of the solenoid valve that
controls the dehumidification circuit.
See the controller manual; check the
operation of the panel and/or the probe.
Check the room temperature setting (see the
control panel manual).
Verificare la consistenza del carico latente.
Check the pressure of the supply water;
Check the operation of the manual control
system and the steam production unit (see the
control panel manual)
See the control panel manual; check the
operation of the panel and/or the probe.
Check the power supply to the fans.
Clean the filter using a vacuum cleaner after
having shaken off the larger particles of dust.
Replace the filter if excessively clogged.
Check the correct calibration of the dirty filter
differential pressure switch F4.
See the paragraph on AIR DISTRIBUTION
Check the resistance of the fan windings; after
resetting, measure the voltage and power
input.
Check the sizing of the air distribution system
(ducting, false-ceiling, underfloor plenum, grills)
EN 67