Eliwell IDplus 971 - Alarms and Fault Management

ALARMS
Label Fault Cause Effects Remedy
E1
Cold room
probe1 faulty
• measured values are outside operating
range
• Probe faulty/short-circuited/open
• Display label E1
• Alarm icon permanently on
• Disable max/min alarm controller
• Compressor operation based on parameters
“Ont” and “OFt”.
• check probe type (par. H00)
• check probe wiring
• replace probe
E2
Defrost probe2
faulty
only on IDPlus
971/974
• measured values are outside operating
range
• probe faulty/short-circuited/open
• Display label E2
• Alarm icon permanently on
• The Defrost will end due to Timeout (dEt)
• The evaporator fans will be: on if the
compressor is ON, or running in accordance with
the FCO parameter if the compressor is OFF
• check probe type (par. H00)
• check probe wiring
• replace probe
E3 Probe3 faulty
• measured values are outside operating
range
• probe faulty/short-circuited/open
• Display label E3
• Alarm icon permanently on
• check probe type (par. H00)
• check probe wiring
• replace probe
AH1
Alarm for HIGH
Pb1 temperature
value read by Pb1 > HAL after time of
“tAO” (see “MAX/MIN TEMP. ALARMS)
• Recording of label AH1 in folder AL
• No effect on regulation
Wait until value read by Pb1 returns
below HAL
AL1
Alarm for LOW
Pb1 temperature
value read by Pb1 < LAL after time of
“tAO” (see “MAX/MIN TEMP. ALARMS)
• Recording of label AL1 in folder AL
• No effect on regulation
Wait until value read by Pb1 returns
above LAL
EA External alarm
Digital input activated
(H11 = ±5)
• Recording of label EA in folder AL
• Alarm icon permanently on
• Regulation locked if rLO = y
check and remove the external cause
which triggered the alarm on the D.I.
OPd Door open alarm
digital input activation
(H11 = ±4)
(for longer than tdO)
• Recording of label Opd in folder AL
• Alarm icon permanently on
• Controller locked
• close the door
• delay function defined by OAO
Ad2
Defrost due to
timeout
end of defrost cycle due to timeout rather
than due to defrost end temperature being
recorded by Pb2
• Recording of label Ad2 in folder AL
• Alarm icon permanently on
wait for the next defrost cycle for
automatic return