34
1
2
3
4
5
6
7
8
9
10
+
Insufficient water and/or air volume
The filter and/or the coil is clogged
Clean the filter and/or the coil
The fan speed is too low
Change the position of the speed se-
lector
The air delivered by the unit is not hot
or cold enough
Water and/or air temperature at the en-
try of the fan coil does not comply with
the expected values
Verify the available power and the in-
stalled power. Operate accordingly
The pump is not powerful enough to
handle operational requirements
Replace the pump with a pump suitable
to the installation requirements
In case of other problems, contact the area distributor or YORK service department.
7.3.1 ALARMS OF THE INVERTER AND MOTOR
The inverter is equipped with a LED (see Fig. 7), which in case of alarms, blinks in different
time intervals depending on the type of alarm detected. The Alarm output is open collector
type, open in case of alarm (V
max
24V, l
max
5mA sink).
ALARM TYPES
LED INDICATIONS ALARM INDICA-
TIONS DIP4=OFF
ACTIONS
NOTES
Over temperature Blink Alarm led
3 s ON - 0,5 s OFF
Blink Alarm output
3 s ON - 0,5 s OFF
Motor OFF
Auto restart Alarm. After about
1,5 min of persistent condition
the Alarm is set permanently: led
ON and Alarm ON. System is in
STOP mode.
Over voltage
Undervoltage
Over current
Over Load
Blink Alarm led
0,5 s ON - 0,5 s OFF
Blink Alarm output
0,5 s ON - 0,5 s OFF
Speed reduction Power limiting
Safety control
Temperature limiting
Stop
Alarm Led ON
permanently
Alarm Led Out ON
permanently
Motor OFF
Set 0V on input to reset the alarms
7.4 EXTRAORDINARY MAINTENANCE
All operations of extraordinary maintenance, such as regulation or the re-
placement of the electric components, (motor, control, valves, etc.) must be
executed by qualified personnel only.
Before proceeding with any operation of extraordinary maintenance, make
sure that the unit has been disconnected from the power supply.
In case of fire, in order to prevent risk of electrocution, do not use water.
Use powder or CO
2
extinguishers.
