omi ED Series, Operator'S Manual

Page: 14 / 116

Cod. 710.0103.01.00 Rev2A – 11.2012
10 - 111
Not resettable alarms
An alarm is defined NOT resettable (NO) when the cause that produces it persists, these types of alarms can’t be directly reset by the
controller until the causes that produce them are eliminated.
When one of these alarms appear proceed as follows:
- Identify the alarm code shown on controller display.
-
Follow indications on alarm table PAR. 6.5.3. to eliminate the alarm original cause.
- Reset the alarm using the procedure described on previous point.
-
if the alarm persists, try to reset pushing button for 3 sec. stopping the operation process (label OFF shown on
controller display), then restart pushing the same button.
-
If the alarm persists call your local OMI distributor.
- Quit pushing button or wait for automatic quit.
6.5.3 Alarm table
Label Meaning Cause / Origin Controller status Reset
P1
(Pb1) Dew point probe
alarm
Missing, faulty probe or
resistance exceeding
value
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Automatic
if the probe value recovers
If the alarm persists call your local OMI distributor
P2
(Pb2) Air inlet
temperature probe
alarm Valid only if
CF05 =1
Missing, faulty probe or
resistance exceeding
value
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Automatic
if the probe value recovers
If the alarm persists call your local OMI distributor
P3
(Pb3) Ambient
temperature probe
alarm Missing, faulty probe or
resistance exceeding
value
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Automatic
if the probe value recovers
If the alarm persists call your local OMI distributor
P4
(Pb4) Refrigerant circuit
suction temperature
probe alarm Missing, faulty probe or
resistance exceeding
value
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Automatic
if the probe value recovers
If the alarm persists call your local OMI distributor
A1
Dew Point high
temperature prealarm
(Pb1 probe)
Dew Point temperature
higher than the presetted
value
( PB1 > AL23 )
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Not necessary
A2
Dew Point low
temperature prealarm
(Pb1 probe)
Dew Point temperature
lower than the presetted
value
( PB1 < AL20 )
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Not necessary
A3
High inlet air
temperature prealarm
(Pb2 probe) Valid only
if CF05 =1
Inlet air temperature
higher than the presetted
value
( PB2 > AL26 )
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Not necessary
A4
High ambient
temperature pre-alarm
(Pb3 probe)
Ambient temperature
higher than the presetted
value
( PB3 > AL11 )
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Not necessary
A5
High refrigerant circuit
suction temperature
prealarm (Pb4)
Refrigerant circuit suction
temperature higher than
the presetted value
( PB4 > AL29 )
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Not necessary
AHP
High pressure safety
switch (HP/LP) alarm
(1P1 switch)
High pressure switch
digital input activation
Open collector / alarm relay ON
Buzzer ON
High pressure alarm icon lighted
Alarm code on display
Manual
Digital input deactivation then manual reset from Functions
menu.
AtFA
(1Q2) Fan thermal
protection alarm Digital input
activation
Open collector / alarm relay ON
Buzzer ON
General alarm icon lighted
Alarm code on display
Manual
Restart the (1Q2) thermal protection, then proceed with
manual reset from Functions menu.
If the alarm persists call your local OMI distributor
ALP
Low pressure switch
(LP) alarm
(1P3 switch)
Low pressure switch
digital input activation
Open collector / alarm relay ON
Buzzer ON
Low pressure alarm icon lighted
Alarm code on display
Automatic
It becomes manual after AL02 activations / hour
Manual
Digital input deactivation then manual reset from Functions
menu.