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OPERATION (Units Made Prior to July 2018) (cont.)
2. MAIN FUNCTIONS
2.1 HOW TO SEE THE SET POINT
1. Push and immediately release the SET key: the 'SET' label appears;
2. To display the Set point value press the SET key;
3. Wait about 15 seconds to return to normal visualization.
2.2 HOW TO CHANGE THE SETPOINT
1. Push and immediately release the SET key: the 'SET' label appears;
2. To display the Set point value press the SET key;
3. To change the Set value push the
4. Press SET key to confirm the modification.
2.3 HOW TO START A MANUAL DEFFROST
Push the
key for more than 5 seconds and a manual defrost will start. If the defrost conditions:
• parameter OdO ≠ 0
• probe Pb2 temperature is higher than the defrost end temperature
are not satisfied, the display will flash 3 times, to indicate that the operation will not be carried out.
2.4 TO LOCK THE KEYBOARD
It is possible to disable the keypad on this device. The keypad can be locked by programming the 'LOC' parameter.
With the keypad locked you can still access the 'Machine Status' menu by pressing SET key to display the Set point,
but you cannot edit them.
2.5 TO UNLOCK THE KEYBOARD
To disable the keypad lock repeat the locking procedure.
3. ALARM SIGNALLING
Alarms are always indicated
by the buzzer (if present)
and the alarm icon
To switch off the buzzer,
press and release any key;
the corresponding icon will
continue to flash.
or
Label Cause
• measured values are outside
E1
operating range
• Probe faulty/short-circuited/open
.
• measured values are outside
E2
operating range
• Probe faulty/short-circuited/open
value read by Pb1>HAL after time of
AH1
tAO. (see 'MAX/MIN TEMPERATURE
ALARMs')
value read by Pb1<LAL after time of
AL1
tAO. (see 'MAX/MIN TEMPERATURE
ALARMs')
digital input activation
EA
(H11 = ±5)
digital input activation
OPd
(H11 = ±4)
(for longer than tdO)
end of defrost cycle due to timeout
rather than due to defrost end
Ad2
temperature being recorded by probe
Pb2.
arrows.
Effects
• Display label E1
• Alarm icon permanently on
• Disable max/min alarm controller
• Compressor operation based on parameters Ont and
OFt
• Display label E2
• Alarm icon permanently on
• The Defrost cycle will end due to Timeout (dEt)
• The evaporator fans will work in Duty Cycle mode
• Recording of label AH1 in folder AL
• No effect on regulation
• Recording of label AL1 in folder AL
• No effect on regulation
• Recording of label EA in folder AL
• Alarm icon permanently on
• Regulation locked if EAL = y
• Recording of label Opd in folder AL
• Alarm icon permanently on
• Controller locked
• Recording of label Ad2 in folder AL
• Alarm icon permanently on
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