11 - EN
EWRC 300/500 NT
English
ALARMS TABLE
This section lists alarms associated with the default configuration of the instrument.
For a description of alarms relating to custom configurations, refer to the user manual or contact Eliwell Technical Support.
Label Cause
Effects
Problem solving
E1*
Pb1 room probe faulty
• Measured values are outside operating
range
• Probe faulty/short-circuited/open
• Label E1 displayed
• Disabling of maximum and minimum
alarm regulator
• Compressor operation based on parame-
ters “Ont” and “OFt” if set for duty cycle.
• Check probe type NTC/PTC (see H00)
• Check probe wiring.
• Replace probe
E2*
Pb2 defrost probe faulty
• Measured values are outside operating
range
• Probe faulty/short-circuited/open
• Label E2 displayed
• The Defrost cycle will end due to time-
out (Parameter “dEt”)
• Check probe type NTC/PTC (see H00)
• Check probe wiring.
• Replace probe
LA1
Pb1 LOW temperature alarm
• Value read by Pb1 < LAL after time of
tAO.
• Recording of label LA1 in folder ALr
• No effect on regulation.
• Wait for the temperature value read by Pb1
to come back above LAL+AFd
HA1
Pb1 HIGH temperature alarm
• value read by probe Pb1 > HAL after
time of “tAO”.
• Recording of label HA1 in folder ALr
• No effect on regulation.
• Wait until temperature value read by Pb1
returns below HAL-AFd.
Ad2
End of defrost cycle due to time-out
rather than due to defrost end tempera-
ture being read by the defrost probe
• Recording of label Ad2 in folder ALr
• Wait for the next defrost cycle for automatic
return
OPd
• Activation of digital input (set as door
switch) See para. H11/H12
• Depends on delay set by parameter tdO
• Recording of label OPd in folder ALr
• Regulator locked (see para. dOA/PEA)
• Close door
• Depends on delay set by parameter OAO
E10**
**Models with clock only
Clock alarm clock faulty or battery low
Functions associated with clock not
present
Contact Eliwell Technical Support
ALL ALARMS
• Alarm icon permanently alight
• Buzzer (if present) and alarm relay (OUT5) activated, except Ad2
• Press any key to silence the alarm. The LED changes from a steady light to a blinking light. NOTE: the buzzer is deactivated while the alarm
relay remains active
*E1 - E2: If simultaneous they will be shown alternately on the display at a frequency of 2 seconds
WARNINGS
Important! Make sure the appliance is switched off before working on the electrical connections.
• Probe and digital inputs, OUT5 relay: screw-on terminals pitch 5.01
: electric cables with max.
cross-section 2.5 mm
2
(only one wire per terminal for power connections).
• Power supply and relay OUT1..OUT4: screw-on terminals pitch 7.62
: electric cables with max.
cross-section of 4 mm
2
(only one wire per terminal for power connections).
For the capacity of the terminals, see the label on the instrument. Outputs on OUT1-4 relay max. capacity
18A.
Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient power
capacity. Make sure that power supply is of the correct voltage for the instrument.
Probes have no connection polarity and can be extended using a normal two-core cable (note that
extension of the probe leads influences the instrument’s electromagnetic compatibility - EMC and
measurement class: take great care with the wiring). Probe cables, power supply cables and the TTL
serial cables should be routed separately from power cables.
