Ranco RDT-1110 - Page 9

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 RDT
2210/3210
• 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 compresso
r is OFF
• 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
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