Maintenance, troubleshooting, spare parts and dismantling
ACT VS 3000 - 6000
EN - 43
◆
Electronic
controller DMC50
in alarm condition
(status area red
colour) - See
section 10.15.6
Status area blinking red : one or more alarms are active. The display shows the ID code
and the description of the active alarm.
Status area steady red : one or more alarms need to be reset. The display shows the ID
code and the description of alarm which is no longer active but which still need to be
reset.
Alarms are shown by following codes and descriptions :
1.
High Pressure Switch
- HPS pressure switch triggered (refrigerant high pressure)
because the refrigerant pressure is too high
– see the specific point.
2.
Low Pressure Switch
- LPS pressure switch triggered (low pressure) because the
refrigerant pressure is too low
– see the specific point.
3.
Fan protection (
air-cooled) - At least one of electrical protections of the fan has triggered
or the variable speed drive is in alarm condition or fault - see electric diagram.
Circuit breaker QV1 has tripped - reset circuit breaker, restart and check the perfect
functioning of the dryer.
Variable speed drive INV2 in alarm condition
– For complete information refer to the
manual of the condenser fan drive. To reset the alarm conditions, switch off the dryer main
switch (Control panel pos.1) wait at least 60 seconds, and then restore the power.
If one or more alarms are active, the condenser fan driv
e’s display will show active alarm
code number.
To reset the alarm, press the [Reset] button on the fan variable speed drive, the alarm LED
will switch off.
Fan variable speed drive has an internal alarm log accessible from the drive display as per
following procedure:
Push “Menù” button two times
Push “UP” or “DOWN” button until display shows “15-_ _” and push “OK” button
Push “UP” or “DOWN” button until display shows “15-30” and push “OK” button
The latest alarms are logged and displayed with their alarm code.
The total alarm logged are 10, starting with number 0 to 9.
Alarm code and description:
2
– Fault in condenser fan drive, replace the driver.
4
– Mains phase loss – Missing phase on supply side, or too high voltage imbalance.
Check supply voltage.
7
– DC over voltage – Intermediate circuit voltage exceeds limit.
Check static or transient overvoltages in the input power supply. Restore it in the proper
operating limits.
8
– DC under voltage – Intermediate circuit voltage drops below “voltage warning low” limit.
Check and correct:
- missing phase in input power supply
- blown fuse
- undervoltage on mains
9
– Fan driver overloaded – More than 100% load for too long time.
Check and correct:
- ambient temperature is too high - restore nominal conditions.
- condenser cleaning or any obstruction to fan ventilation (condenser fan canalization
not admitted)
- fan motor current adsorption is higher than nominal
– check proper fan motor
functioning
10
– Motor ETR over temperature – Motor is too hot due to more than 100% load for too
long time.
Wait 30 minutes, restart and check the perfect functioning of the dryer.
11
– Motor thermistor over temperature – Thermistor or thermistor connection is
disconnected.
Check and correct fan motor internal thermal protection(s) and their connection to the
fan driver. Wait 30 minutes, restart and check the perfect functioning of the dryer.
12
– Fault in condenser fan drive, replace the driver.
13
– Over current – Output current limit is exceeded.
Check and correct:
- fan cable or connections.
- low input voltage to fan driver.
- faulty fan.
14
– Earth fault – Discharge from output phases to ground.
Check and correct ground fault on motor or motor-to- fan driver cables.
16
– Short Circuit – Short circuit in motor or on motor terminals/connections.
Check and correct short circuit on motor or motor-to- fan driver cables.
17
– Fault in condenser fan drive, replace the driver.
25
– Fault in condenser fan drive, replace the driver.
