7
ALARMS
Label Fault Cause Effects Remedy
E1
Probe1 faulty
(cold room)
• Reading of out of range operating
values
• Probe faulty / short-circuited / open
• Display label E1
• Alarm icon permanently ON
• Min/max alarm regulator disabled
• Compressor operation according to
“Ont” and “OFt” parameters.
• Check probe type (NTC)
• Check the probe wiring
• Replace probe
E2
Probe2 faulty
(defrost)
• Reading of out of range operating
values
• Probe faulty / short-circuited / open
• Display label E2
• Alarm icon permanently ON
• The defrost cycle will end due to
Time-out (Parameter “dEt”)
• Check probe type (NTC)
• Check the probe wiring
• Replace probe
AH1
Probe1 HIGH
Temperature
alarm
Value read by Pb1 > HAL after time
of “tAO”.
(see “MAX/MIN TEMP. ALARMS “)
• Registration AH1 label in the AL folder
• No effect on regulation
• Wait until temperature value
read by probe1 returns below
HAL.
AL1
Probe1 LOW
Temperature
alarm
Value read by Pb1 < LAL after time
of “tAO”.
(see “MAX/MIN TEMP. ALARMS”)
• Registration AL1 label in the AL folder
• No effect on regulation
• Wait until temperature value
read by probe1 to come back
obove LAL
EA External alarm
• Digital input activated
(H11 = ±5)
• Registration EA label in the AL folder
• Alarm icon permanently ON
• Regulation blocked if EAL = y
• Check and remove the external
cause which generate alarm
on D.I.
OPd Door Open alarm
• Digital input activated
(H11 = ±4)
(for a longer time than tdO)
• Registration Opd label in the AL folder
• Alarm icon permanently ON
• Regulator blocked
• Close the door
• Delay function defined by OAO
Ad2
Defrosting
for time-out
• End of defrosting because of time
instead of because of reaching the
defrost end temperature detected
by the Pb2 probe.
• Registration Ad2 label in the AL folder
• Alarm icon permanently ON
• Wait until the next defrost for
automatic return
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