Nordmann AT4 Operating Instructions Manual page 62

Warning
LED Display
Max. admissible electrode
current exceeded
–––
Warning
W25: Excess Current
––– –––
Foam detection
–––
Warning
W27: Foam
Steam cylinder needs service
yellow
Warning
lights
W28: Cyl. Maintenance
Steam cylinder needs service
yellow
Warning
lights
W29: Cyl. Maintenance
Humidity sensor signal (signal Y)
missing
–––
Warning
W32: HumSensor broken
Signal of humidity limitation sensor
(signal Z) missing
–––
Warning
W33: Lim Sens broken
Module A (B) locked via Modbus
–––
Warning
W34A: Module disable
––– –––
Standby mode of
steam cylinder active
–––
Warning
W36: Idle Mode active
Forced draining of
steam cylinder active
–––
Warning
E37: Forced Drain
62
Error
LED Display
Max. admissible electrode
current exceeded
red
Error
lights
E25: Excess Current
Relay heating voltage jammed
red
Error
lights
E26: Req.Off Current
Foam detection (4 automatic drain-
ings within 24 hours)
red
Error
lights
E27: Foam
Service interval for
steam cylinder exceeded
red and
Error
yellow
E28: Cyl. Maintenance
flash
Max. operating hours of the steam
cylinder reached
red and
Error
yellow
E29: Cyl. Maintenance
flash
Humidity sensor signal (signal Y)
missing for more than 1 minute
red
Error
lights
E32: HumSensor broken
Signal of humidity limitation sensor
(signal Z) missing for more than 1
minute
red
Error
lights
E33: Lim Sens broken
–––
Modbus Timeout (5 s)
red
Error
lights
E35A: Modbus Timeout
Standby mode of
steam cylinder failed
red
Error
lights
W36: Idle Mode Failed
––– –––
Cause
Drain pump defective.
Drain in steam cylinder blocked.
Water conductivity too high for the selected
steam cylinder type.
Relay heating voltage jammed in activated
position.
Foaming in steam cylinder.
Mineral deposits and/or electrodes spent.
Maximum operating hours of the steam
cylinder reached.
No sensor signal present at signal input
(Signal Y).
No sensor signal present at signal input
(signal Z).
Module A (B) locked because the corre-
sponding Modbus register is deactivated.
No actual demand or humidity signal
received via Modbus.
Automatic standby operation (Standby-
Drain, AntiFreeze, KeepWarm) of steam
cylinder active or failed.
Forced draining of steam cylinder active.
Remedy
Inspect drain pump, replace if necessary.
Replace the steam cylinder.
Select correct steam cylinder type.
Inspect relay, replace if necessary.
Drain steam cylinder via drain key (sev-
eral times, if necessary). Check quality of
the supply water.
Replace steam cylinder.
Important: After replacement of the steam
cylinder, reset the maintenance counter
(see chapter 6.6).
Replace steam cylinder.
Important: After replacement of the steam
cylinder, reset the maintenance counter
(see chapter 6.6).
Check humidity sensor (signal Y) , replace
if necessary. Inspect wiring.
Check humidity sensor (signal Z) , replace
if necessary. Inspect wiring.
Activate the corresponding Modbus
register.
Send actual demand or humidity signal.
Warning status: No measures must be taken.
Error status: Check water supply, heating
voltage supply, main contactor.
No measures must be taken.