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Message on
Problem
Sentinel2
SENTINEL-2 don't switch on
Parameter value is not displayed but
- - - -
'- - - - '
t2
t3
t4
Faulty probe
P1
P3
ALL messages
Sentinel2 displays an alarm but unit doesn't stop Wrong connection for terminals 430-432
NONE
None alarme is displayed but fan is not powered
message
by Sentinel when unit is running.
Unit discharge temperature exceed the expected
t2-H
limits
t3-H
Oil temperature exceeds expected limit
t4-H
t3-L
Oil temperature is lower than the expected limit
t4-L
Low oil pressure
P.3-1
(for WS-WL /S)
High oil pressure
P.3-2
(for WS-WL /S)
P-P1
Alarms P-P1 and/or A-P1 are on but suction filter
A-P1
is not clogged nor dirt
SENTINEL stops always the blower and
AL-1
visualizes the messages AL-1 or AL-2
AL-2
But there is oil
Sentinel2 reveals fan current protection but the
protection has not really intervened
tF
Fan current protection halt the fan and
subsequently the compressor
Sentinel2 reveals main motor current protection
tn
but the protection has not really intervened
SENTINEL-2 doesn't reset emergence alarm
even if the emergency button is not activated
E
Pushing the emergency button unit doesn't stop
even if Sentinel2 doesn't displays message E
Pushing the emergency button unit doesn't stop
Sentinel2 displays belt broken but belt is not
rCn
broken not slippery
Alarm IN4 is activated after 50 seconds from unit
start
IN4
Alarm IN4 remains on after a sudden stop of the
unit
CLOH
Alarm CLOH is on at the firs start up of the device Battery low
Sentinel2 downloads data on smart-key but file
Data Download
is empty
Cause
No electrical supply
Transducer not enabled
Sentinel doesn't receive any signal from
transducer
Wrong connection for terminal 437
Ambient temperature is too high
Wrong rotation direction for noise hood fan
Noise hood fan is not working or faulty
Operating conditions (discharge pressure,
inlet temperature...) are different from the
expected ones.
Oil level is too low
Operating conditions (discharge pressure,
inlet temperature...) are different from the
expected ones.
Oil is excessively cold to start the unit
Unit's operated by VFD at a minimum speed
lower than the one indicated in the compressor
instruction manual
Unit is arrested with VF by a deceleration
ramp.
Oil injection valve has to be cleaned/regulated
Oil injection circuit is clogged
Oil injection valve has to be regulated
Set values for pre alarm P-P1 and for alarm
A-P1 are set not correctly
Faulty transducers connection
Oil level transducers damaged
Wrong internal wiring
13KM8 protection is wrongly set
Faulty noise hood fan
Wrong connection for terminal 435
Emercency circuit has not been reset by key
contactor.
Wrong connection for emergency terminals
410-411
Contact 437 is not OFF (0 VAC) when the unit
is stopped
Wrong connection for emergency terminals
410-411
Unit's operated by VFD at a minimum speed
lower than the one indicated in the compressor
instruction manual
Contact 437 is ON (24 VAC) but the unit is not
running yet
Compressor is set to /F but it's effectively a
/S or a blower
Wrong connection for terminal 437
P2 or P3 probes detect pressure > 0 when the
unit is not running
Temperature T2>T2-L
Previously damaged files on smart-key
Remedies
Check the electric supply from the starting panel
Verify the set-up menu
Contact Robuschi Service
Check probe connection and if necessary replace probe.
Check connection of terminals 430-432 in accordance with
paragraph 4.2
Check connection of terminal 437 in accordance with
paragraph 4.2 withdrawing it from terminal 1270
Improve local air recirculation
Contact Robuschi Service
Revise fan electrical wiring
Check fan operation and eventually replace the fan
Contact Robuschi Service
Refill oil sump or reservoir
Contact Robuschi Service
Pre-heat lubrication oil before starting the unit
Regulate VFD in order to avoid operation of the unit outside
the allowable range
Don't use deceleration ramp option to arrest compressor by
VFD.
Clean the injection valve and regulate it.
Contact Robuschi Service
Contact Robuschi Service
Contact Robuschi Service
Execute menu P—t Autotuning
Check the connection of the oil level transducer with
SENTINEL-2
Replace the transducers
Contact Robuschi Service
Verify fan data and set 13KM8 protection
Contact Robuschi Service
Replace fan
Check connection of terminal 435 in accordance with
paragraph 4.2
Reset emergency circuit by the key contactor on the panel of
the ancillary circuits.
Check connection of terminals 410-411 in accordance with
paragraph 4.2
Check connection of terminal 437 in accordance with
paragraph 4.2 withdrawing it from terminal 1270
Check connection of terminals 410-411 in accordance with
paragraph 4.2
Regulate VFD in order to avoid operation of the unit outside
the allowable range
Check that the contact 437 is ON only when unit is really
running. If the unit is VFD operated contact 437 should not be
ON with VFD powered and unit stopped.
Contact Robuschi Service
Check connection of terminal 437 in accordance with
paragraph 4.2 withdrawing it from terminal 1270
Restore conditions in discharge pipe or oil circuit
Replace probe if faulty
Wait for unit cool down
Reset Alarm and operate unit normally.
Format smart-key
39
W2-0A5 12-I
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