Product Manual

Operating instructions
66 firstAir screw compressor FAS03 – 37
12.5.3 Alarm due to major faults
If a major fault occurs and the system cannot be restarted, the compressor stops. Rectify the problem and
restart the compressor. A major fault is displayed in the status line of the controller.
No.
Alarm displayed
Description of the alarm
1
Alarm – High com-
pressed air final tempera-
ture
The compressed air final temperature is too high – check the lubri-
cation system
2
Alarm – high final pressure
The final pressure is too high – check the safety valve
3
Temperature sensor –
no signal
No temperature sensor signal – check sensor and cable
4
Pressure transducer –
no signal
No pressure transducer signal, check sensor and cable
5
Stop – main motor over-
load
The main motor is overloaded, check the lubrication system for the
drive
6
Stop – cooling air fan mo-
tor overload
The motor for the cooling air fan is overloaded –
check the cooling air fan; if a thermal overload relay is installed, re-
set the relay
7
Stop – water loss
(for water-cooled systems)
Cooling water could not be refilled –
check the cooling water system
8
Phase sequence fault
Direction of drive rotation incorrect –
change phase sequence of input current
9
Temperature too low
The lubricant temperature is too low –
heat up the lubricant
10
Voltage too high
The supply voltage is too high –
check the voltage supply
11
Voltage too low
The supply voltage is too low –
check the voltage supply
12
Precipitator tank tempera-
ture too high
The temperature in the precipitator tank is too high –
check the cooling system
13
Precipitator tank pressure
too high
The pressure in the precipitator tank is too high –
check the relief valve
14
Current incorrect
The power supply fluctuates, pressure relief current too high –
check the power supply and relief valve