We reserve the right to change designs and technical specifications of our products.
Manual ENA 7-30
1918
ENG
7. Maintenance and troubleshooting
• The water and the contact surfaces can be 70 °C or more.
• Wear the required protective clothing.
• The floor can be wet or greasy. Wear protective shoes.
7.1. Before maintenance
There can be life voltage on the
terminal bars even when the main
power supply is disconnected.
Make sure all external power
supplies (e.g. external refill
equipment) are also disconnected
from the automat.
Release the pressure of vacuum tank before maintenance.
7.2. Aer a power failure
The programmed parameters of the controller do not change aer a power failure.
• Check the condition of the automat for integrity aer a power failure.
7.3. Maintenance interval
Confirm maintenance in the service menu.
Interval Component Activity
Annually ENA 7-30 Check leak tightness of joints,
pumps and screw connections.
If necessary, seal or tighten the
screw connections.
Every year before the peak
period
On-site dirt trap in the feed line
Vent. device
Clean the guards
Check the functions Vacuum test
7.4. Change the automat for water treatment
• Switch o water treatment in the hardware menu and change the module.
• Adjust the capacity in the parameter menu.
• Switch on “water treatment” in the hardware menu
7.5. Error message
NR Message Description Reset Possible cause Troubleshooting
1
Pressure too
low
System pressure
too low, is outside
working pressur
range
B
• Leakage
• Pressure-holding value
wrongly set
• Wrong admission
pressure
• Filling pressure too low
• Eliminate leakage
• Set correct pressure-
holding value
• Increase filling pressure
up to working pressure
range
2
Pressure too
high
System pressure
too high, is outside
working pressure
range
B
• Pump does not switch
o
• Diaphragm expansion
vessel too small/ wrong
admission pressure
• Filling pressure too
high
• Check control
• Check admission
pressure / use larger
diaphragm expansion
vessel
• Lower filling pressure to
working pressure range
3
Entrycap. too
low
Litres counter does
not supply water aer
make-up request
A
• No pulses sent from
litres counter, because:
• litres counter defective
• cable not co
• Replace litres counter
• Connect cable
• Use higher setting value
for response time
5
Cycle interval Make-up cycle
interval too short
A
• Leakage in system
• False setting value
• Eliminate leakage
6
Nr. of cycles Maximum number
of cycles within time
window exceeded
A
• Leakage in system
• False setting value
• Eliminate leakage
• Program correct settings
7
Fill error
Filling without request
(litres counter sends
signal without filling)
A
• Leakage
• Solenoid valve don‘t
close/defectiv
• Eliminate leakage
• Replace solenoid valve
8
Quantity limit Maximum quantity
in a make-up cycle
exceeded
A
• Leakage
• Setting value for fl ow
rate reduction too low
• Eliminate leakage
• Correct the setting value
9
Runtime
protection
Maximum time in
a make-up cycle
exceeded
A
• Leakage
• Setting value for flow
• Pump doesn’t deliver
• Eliminate leakage
• Correct the setting value
• Deaerate pump
10
Exchange
module
Soening module
exhausted
A
• Module capacity
(water treatment)
exhausted
• Replace module
11
Low mA
P-sensor
Interruption of
current loop of
pressure sensor
A
• Sensor defective
• Terminal/cable
defective
• Replace sensor
• Check/exchange
terminal/ cabling
12
High mA
P-sensor
Short-circuit in
current loop of
pressure sensor
A
• Sensor defective
• Terminal/cable
defective
• Short circuit
• Replace sensor
• Check/exchange
terminal/ cabling
13
Vacuum error 3 times in succesion
insuicient vacuum
for dearation
A
• Temperrature in return
branch higher than
70 °C
• Pump does not
operate continuously
• Leakage in ENA 7-30
• Vent device doesn’t
close
• Take steps for ensuring
return temperatures
below 70°C!
• Replace pump
• Locate leakage in ENA
7-30
• Clean or replace vent.
device
14
Level switch
error
Low level
A
• Vent. device defective
• Strainer / inlet
protected
• Valves closed
• Clean or replace vent.
device
• Clean strainer
• Open valves
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