Sub-Zero CRC-2052 User manual

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Index
01
Index
Features
LED Indication. 8
Parameter List.
To set the quick freeze set point.
QFS 9
Key Introduction 6
4
Fault Messages. 7
DESCRIPTION
PARAMETER
Pg.
No.
To set the cut-out point of the controller.
SET POINT 9
To set other parameter 9
To set allowable high temperature limit.
To set allowable low temperature limit.
To set the differential for compressor
restart.
P2
P3
P4
10
10
10
To set probe calibration.P5 11
To set time delay between relay restart
time.
P6 11
To set duration of defrost.P7 12
To set defrost frequency.
To set power on defrost delay.
To set type of defrost.
To set drip time for defrost.
To set defrost stop temperature.
To set type of computation for defrost time.
P8
P9
P10
P11
P13
P12
12
12
13
13
14
13
14
14
Items Included. 5
9
EXIT End of set mode 9
DI-D To select AUX or compressor thermal
trip digital I/P
OPS To Enable / Disable Oil Pressure Switch
(OPS) I/P.
Index
02
Index
DESCRIPTION
PARAMETER
Pg.
No.
To set Evaporator Fan stop temperature.
To set Evaporator Restart Delay.
To set Evaporator Fan status at
compressor off.
To set Evaporator Fan differential.
To set Evaporator probe calibration.
15
To set condenser status at hot gas
defrost.
CND7
L1
L2
L3
L4
L5
16
16
16
17
17
17
17
18
19
19
20
To set Evaporator Fan status at Door
open condition.
L7
20
To enable / disable buzzer.BUZ
21
Alarm Relay Enable / Disable.AL
21
Under load limit for compressor current.C-UL
21
Over load limit for compressor current.C-OL
22
To set Evap Fan status during defrost.L8
20
To set reset mode for HP fault.
D4
To set Compressor Relay status on
Probe Failure.
E1
Current sensing delay.
C2
To enable or Disable HP sensing.
D0
To enable or disable LP sensing.
D1
Fault sensing logic.
To set LP sensing delay.
D2
D3
16
15
To set quick freeze duration.QFD
15
To set condenser on delay time.CND6
18
HT Power ON alarm delay.ADT
18
Alarm/Buzzer output delay at Door openADD
18-19
Temperature Hold Duration at Door openTHD
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04
Features:
A number of parameters are displayed alphanumerically to set
up the instrument for each specific function.
Single Operation Quick Freeze Mode(Press key for 2
sec), set system in quick freeze mode which is time based for
that period new set point will be lower than running set point
and system will try to achieve that set point, after time period
over set point will be normal set point.
This controller controls the defrost in the system based on
either an electrical heater where the compressor is stopped,
or at cycle inversion using warm gas where the compressor
keeps on working.
There are safety features which include shutting down the
system incase of a fault from a pressure control or similar
device.
A series of “safety controls” (delay at start-up, minimum disable
time, minimum time between activation) protects the
compressors from close starts. In case of probe error or
temperature alarm, the instrument signals the event through
acoustic signal and by closing the relay contact. By pressing
the mute key, the buzzer is silenced.
Computer Connectivity over RS485 and Remote monitoring
(Optional).
03
IndexIndex
DESCRIPTION
PARAMETER
Pg.
No.
Defrost duration during Coil probe failure.
E8 23
To set time delay to switch off the light .
To activate Solenoid Valve relay.
To change password.
To view Compressor run Hours.
Clear Compressor Run Hours.
To set Unit ID.
LD
PDN
PW
CRH
CCRH
ID
23
23-24
24
24
24
25
To activate Keypad Lock.
To enable/disable Power Switch.
To set display at power OFF mode.
LP
PO
PDIS
25
25
26
To restore default settings of the
controller.
FS 26
End of programming.
EP 26
Technical Data 27
Suggested Wiring Diagram
To set Display at defrosting.
E7 22
28-35
Instruction Manual for LVM VMRC-10/3
Caution & Warranty 37-38
36
To set On cycle at room probe fail.
TON 22
To set Off cycle at room probe fail.
TOFF 22
Light ON at Door open
LSD 23
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06
Key Introduction
PRG
Amp
PROBE
Used to switch OFF/ON the controller.
Used to come mute the buzzer/Alarm & to exit any mode.
Used to increment / scroll UP in Program Mode.
When not in any mode if this key is pressed for 2 secs controller will
enter in display Probe mode where Evap temperature can be
viewed.
PRG
PROBE
Fault Log
Used to enter into the Set mode. Also used as enter key if controller
is in Set mode/program mode. Also used to save changed value.
Used to enter in manual defrost and to stop defrost if defrosting
is ON.
Used to enter in fault log mode.
Used to enter in quick freeze mode.
Used to decrement / scroll down in Program mode.
Used to enter into the program mode.
Used to enter in display Amp. mode where compressor current can
be viewed.
Used to switch OFF/ON the light.
05
Items included
NO.
1.
2.
3.
4.
QTY
ITEMS
CONTROLLER
CATALOGUE
NTC SENSOR 5 METER
1
2
1
4
8 X 38 SCREW WITH RAWL PLUG
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08
LED Indication
Messages Mode Discription
Comp. Relay Time delay.
Comp. Relay ON.
Comp. Relay OFF.
Cond. Relay ON.
Cond. Relay OFF.
C
EEvap. Relay OFF.
Evap. Relay Time delay.
Evap. Relay ON.
Defrost Relay ON.
Defrost Relay OFF.
Defrost Relay Time delay.
LSV Relay ON.
LSV Relay OFF.
Alarm Relay OFF.
Alarm Relay ON.
Controller is in drip time.
Controller is not in quick freeze mode.
Controller is in quick freeze mode.
Power ON.
Power OFF.
Light Relay OFF.
Light Relay ON.
R-phase present.
R-phase absent.
R
Y-phase present.
Y-phase absent.
Y
B-phase present.
B-phase absent.
B
Flashing
ON
OFF
Flashing
ON
OFF
ON
OFF
Flashing
ON
OFF
Flashing
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
07
High temperature alarm for Room temperature means, room
temperature is equal or above the set value of P2 parameter.
Low temperature alarm for Room temperature means, room
temperature is equal or below the set value of P3 parameter.
Ht
Lt
Room temperature fail means, Room sensor not connected or
out of range.
PP
Evaporator temperature fail means, Evaporator sensor not
connected or out of range.
SPPR Fault.
E-PP
Compressor over load fault.
SPPR
C-OL
Compressor under load fault.
C-UL
Fault Messages :
HP fault.
HP
Auxiliary fault / Compressor Thermal Fault .
LP fault.
LP
AUX/CTH
Door Input Fault.
DO
OPS Oil Pressure Switch Fault.
Compressor switched ON for Pump down in manual defrost
C-PD
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Min : MINIMUM Max : MAXIMUM
Fact. Set : FACTORY SETTING(DEFAULT)
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
To set other parameter
Press & hold SET key for
2 seconds
09
SP To set the cut-out point of the controller.
Display will change to set value.
The set point value can now be changed
by using the UP/DOWN key.
01
To change Set Point parameter,
press the set key.
QFS+0.5 P2-0.5ºC -20.0ºC
Range
Min Max Fact. Set
QFS To set the quick freeze set point.
Use UP/DOWN keys to set desired value.
If controller is in quick freeze mode then
compressor will cut in/ cut out as per this
set point till the quick freeze duration is
over.
02
To change QFS parameter,
press the set key.
P3+0.5 SP-0.5 -25.0ºC
Range
Min Max Fact. Set
To set other parameter
Press & hold PRG key for
2 seconds
PRG
EXIT End of set mode
03
10
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
01
P2
Parameter
Function : To set allowable high
temperature limit.
To change P2 parameter,
press the set key.
Use UP/DOWN key to set desired value.
Once set at a particular value, this will not
allow the set point to go above this
value and below P3 setting.
Example : Setting this parameter at
0
50.0 C will not allow the set point to go
0
above 50.0 C also if the temperature
0
reaches 50.0 C, the display will show HT
(High Temperature). The alarm will be
ON. But at power on till the ADT delay is
over controller will not generate HT Alarm.
SP+0.5ºC 50.0ºC 50.0ºC
Range
Min Max Fact. Set
(Message on Display)
(Message on Display)
02
P3
Parameter
Function : To set allowable low
temperature limit.
Example : Setting this parameter at
Use UP/DOWN key to set desired value.
Once set at a particular value, this will not
allow the set point to go below this value
and above P2 setting.
0
-40.0 C will not allow the set point to go
0
below -40.0 C also if the temperature
0
reaches -40.0 C, the display will show LT
(Low Temperature). The alarm will be ON.
To change P3 parameter,
press the set key.
-40.0ºC QFS-
0.5ºC
-40.0ºC
Range
Min Max Fact. Set
Example(Cooling Mode) : If the set point
0
is set at 10.0 C and differential is set at
0
2.0 C, then when the system reaches
0
10.0 C, the comp. relay will cutout. Since
0
the differential is 2.0 C, the comp. Relay
0
will cutin at 12.0 C
0 0
(10.0 C + 2.0 C).
Use UP/DOWN keys to set desired value.
03
P4
Parameter
Function : To set the differential for
compressor restart.
press the set key.
To change P4 parameter,
0.5ºC 20.0ºC 2.0ºC
Range
Min Max Fact. Set
SET MODE
PROGRAM MODE
QFS = Quick Freeze Set Point
Display will show '0000'. Set correct
password to enter into program mode. The
display will show 'P2' and scroll the
description of the parameter.
To go to other parameters, use UP / DOWN
keys. After desired value, press the SET
key & you will see “----” which confirms that
the parameter value has been stored in
memory.
Display will show ‘SP’ and scroll the
description of the parameter.
To go to other parameters, use UP /
DOWN keys. After desired value, press
the SET key & you will see “----” which
confirms that the parameter value has
been stored in memory.
SP : Set Point.
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P6
Parameter
Use UP/DOWN keys to set desired value.
This parameter is used to protect the fan
from restarting in a short period of time
and can be set between 0 to 20 minutes.
Example : If this parameter is set at 3
minutes, once compressor will cut off at
the set temperature, it will not restart for a
minimum of 3 minutes, even if the
differential is achieved earlier. This
parameter is good to protect the life of the
compressor when there are power
fluctuations and the compressor is
switched off and on within a few seconds.
press the set key.
To change P6 parameter,
05
Function : To set time delay between
compressor relay restart time.
1 Min 20 Min 3 Min
Range
Min Max Fact. Set
Parameter
P5
Example : The temperature on the
O
display is 28.0 C, whereas the actual
O
temperature is 30.0 C. You may need to
O
set this parameter to 2.0 C, which means
that once out of the programming
parameter, the display will show the
O O O
temperature 30.0 C (28.0 C + 2.0 C).
Use UP/DOWN keys to set desired value.
In time it may be possible that the display
may be offset by a degree or so.
To compensate this error, you may need
to add or minus the degrees required to
achieve the correct temperature.
press the set key.
To change P5 parameter,
04
Function : To set room probe calibration.
-10.0ºC 10.0ºC 0.0ºC
Range
Min Max Fact. Set
11
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
12
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Parameter
P7
06
Function : To set duration of defrost.
To change the P7 parameter,
press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 30 Min
Range
Min Max Fact. Set
This is maximum amount of time allowed
for defrost. If set to 0, there will be no
defrost cycle.
Example : If P7 is set to 15 Mins and P8
parameter is set to 1 Hr. then after every 1
Hr defrosting will take place for 15 mins.
P8
Parameter
07
Function : To set defrost frequency.
To change the P8 parameter,
press the set key.
Use UP/DOWN keys to set desired value.
1 Hr 31 Hrs 6 Hr
Range
Min Max Fact. Set Example : same as P7 parameter.
This is the amount of time between two
defrost cycles.
P9
Parameter
08
Function : To set power on defrost delay.
To change the P9 parameter,
press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 0 Min
Range
Min Max Fact. Set
This is the amount of time at power on
after which defrosting will take place
once.
If this parameter is set to 0, there will be no
power ON defrost.
Example : If P9 parameter is 30 mins
then at power after 30 mins defrosting will
take place once.
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13
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
P11
Parameter
10
Function : To set drip time for defrost.
To change the P11 Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
0 Min 30 Min 1 Min
Range
Min Max Fact. Set
Evaporator Fan, LSV relay and Heater
During this period Compressor,
will stay OFF so that the defrost water can
drain out.
Parameter
P12
11
Function : To set type of computation
for defrost time..
To change the P12 Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
REAL CRH REAL
Range
Min Max Fact. Set
Example : If Defrost frequency is set to
6hrs. and 3.45 hrs have passed after unit
has started and power fails, then defrost
cycle will stat after 3½ hours when power
resumes.
running.
REAL = Total of real time.
calculation for defrost frequency will be
for the total hours the unit has been
CRH - Sum of total compressor
operating times. This means that for
time calculation, the unit will add the total
time the compressor has been in an ON
mode.
Example : This means that the time
It keeps a record of the hours worked +/-½
Hour incase of a power failure.
P10
Parameter
09
Function : To set type of defrost.
To change the P10 Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
HTR HTG HTR
Range
Min Max Fact. Set
HTR : Heater defrost where compressor
HTG : Hot Gas defrost where compressor
is OFF.
is ON.
14
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Parameter
P13
12
Function : To set defrost stop
temperature
To change the P13 Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
-40.0ºC 50.0ºC 4.0ºC
Range
Min Max Fact. Set
If coil/Evap temperature is reached upto
this temperature defrost will stop.
4.0ºC, then if defrosting is in progress
then when temperature reaches 4.0ºC,
the defrost process will stop.
Example : If this parameter is set to
DI-D
Parameter
13
Function : To select AUX or
compressor thermal trip digital I/P
To change the DI-D Parameter ,
press the set key.
Use UP/DOWN keys to set desired
value.
If Selected as “AUX” then at fault it will
display "AUX” on display.
If Selected as “CTH” then at fault it will
display “CTH”.
Range
Min Max Fact. Set
AUX CTH CTH
OPS
Parameter
14
Function : To Enable / Disable OPS I/P.
To change the OPS Parameter,
press the set key.
Use UP/DOWN keys to set desired
value.
ENB : OPS I/P is enabled.
DIS : OPS I/P is disabled.
Range
Min Max Fact. Set
DIS ENB ENB
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16
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Use UP/DOWN keys to set desired value.
Parameter
L1
18
Function : To set Evaporator Fan stop
temperature.
To change the L1 parameter,
press the set key.
-40.0ºC 50.0ºC 2.0ºC
Range
Min Max Fact. Set
Parameter
L2
19
Function : To set Evaporator Restart
Delay.
To change the L2 parameter,
press the set key.
0 Min 20 Min 1 Min
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
L3
Parameter
20
Function : To set Evaporator Fan status
at compressor off.
To change the L3 parameter,
press the set key.
OFF ON ON
Range
Min Max Fact. Set
L4
Parameter
21
Function : To set Evaporator Fan
differential.
To change the L4 parameter,
press the set key.
0.5ºC 20.0ºC 2.0ºC
Range
Min Max Fact. Set
15
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
ON : Condenser will be ON
This function is used to decide the
condenser status when hot gas defrost is
ON. This parameter is not applicable for
Heater defrost.
At hot gas defrost,
OFF : Condenser will be OFF
Use UP/DOWN keys to set desired value.
CND7
Parameter
17
Function : To set condenser status at
hot gas defrost.
To change the CND7
parameter, press the set key.
OFF ON OFF
Range
Min Max Fact. Set
QFD
Parameter
15
Function : To set quick freeze duration.
To change the QFD Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
This is the maximum amount of time
allowed for Quick Freeze. If set to “0”,
there will be no quick freeze.
1hr.
Example : If QFS is set to -20.0ºC, and
quick freeze duration is set to 1 hr ,then
when it is in quick freeze mode, then the
Comp. will work on -20.0ºC set point for
0 Hr 12 Hrs 2 Hr
Range
Min Max Fact. Set
Parameter
CND6
16
Function : To set condenser ON delay
timings.
To change the CND6
parameter, press the set key.
When Compressor delay over Condenser
Fan will come ON first, after cond. On
delay over Comp will come ON.
Use UP/DOWN keys to set desired value.
0 Sec 30 Sec 15 Sec
Range
Min Max Fact. Set
Once the fan get OFF at L1 condition, it
will not get restart until L2 duration is over.
This setting is used to limit the Max.
temperature beyond which the Evap.Fan
will cut off.
Example : If this parameter is set to 2.0ºC,
then Evap. Fan will cut OFF at 2.0ºC.
Example : If this is set at 1 minutes, Evap.
Fan relay will cut off at the set by Evap.
Fan Stop TC. Parameter but the Fan will
not come on for a minimum of 1 minutes
even if it’s differential is achieved earlier.
Use UP/DOWN keys to set desired value.
compressor OFF.
compressor OFF.
OFF : Evaporator Fan will be OFF at
ON : Evaporator Fan will be ON at
Use UP/DOWN keys to set desired value.
(2.0ºC-2.0ºC = 0.0ºC) (L1 - L4)
Example : If L1parameter is set to 2.0ºC,
and if Evaporator Fan differential
parameter is set to 2.0ºC,then Evap. Fan
will cut off at 2.0ºC and restart only at
0.0ºC.
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Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
18
AL
Parameter
26
Function : This parameter is used to
Enable / Disable alarm relay.
To change the AL Parameter,
press the set key.
Use UP/DOWN keys to set desired value.
DIS ENB ENB
Range
Min Max Fact. Set ENB : To activate Alarm Relay in fault
condition.
DIS : To deactivate Alarm Relay in fault
condition.
17
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Parameter
L7
23
Function : To set Compressor-
Evaporator Fan status at Door open
condition.
To change the L7 parameter,
press the set key.
Use UP/DOWN keys to set desired value.
At Door Open,
NORM : Normal.
FAN : Evaporator Fan OFF.
COMP : Compressor OFF.
OFF.
F-C : Compressor and Evaporator Fan
NORM F-C NORM
Range
Min Max Fact. Set
BUZ
Parameter
25
Function : To enable / disable buzzer.
To change the BUZ parameter,
press the set key.
Use UP/DOWN keys to set desired value.
DIS ENB ENB
Range
Min Max Fact. Set
Example:
ENB : Buzzer enabled.
DIS : Buzzer disabled.
L8
Parameter
24
Function : To set Evaporator Fan
status during defrost.
To change the L8 parameter,
press the set key.
Use UP/DOWN keys to set desired value.
OFF ON OFF
Range
Min Max Fact. Set
defrost.
defrost.
OFF : Evaporator Fan OFF during
ON : Evaporator Fan ON during
Parameter
L5
22
Function : To set Evaporator probe
calibration.
To change the L5 parameter,
press the set key.
value is from -10.0ºC to + 10.0ºC.
may be offset by a degree or so. To
compensate for this error, you may need
to add or minus the degrees required to
achieve the correct temperature. Setting
Use UP/DOWN keys to set desired value.
In time it may be possible that the display
-10.0ºC 10.0ºC 0.0ºC
Range
Min Max Fact. Set
ADT
Parameter
27
Function : This parameter is used to set
HT power on delay for alarm.
To change the ADT parameter,
press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 30 Min
Range
Min Max Fact. Set
Example : If you set this parameter to 20,
once the power is switched on, the HT
alarm will not activate for 20 minutes after
the power is switched on. This is most
useful to avoid the nuisance alarms when
the ambients are high when the machine
is switched on after a long time.
Parameter
ADD
28
To change the ADD parameter,
press the set key.
0 sec 600 sec 60 sec
Range
Min Max Fact. Set
THD
Parameter
29
Function : This parameter is used to set
duration for temperature hold at door
open.
To change the THD parameter,
press the set key.
Example : This Parameter is set to 60sec,
O
Room Temperature is -18.0 C & Door open
Use UP/DOWN keys to set desired value.
condition occurs then Room Temp value
O
-18.0 C at Door open condition will be hold
for the 60sec, if Room Temperature is
0 sec 180 sec 0 sec
Range
Min Max Fact. Set
Cont.
Function : This parameter is used for
time delay to activate Alarm/Buzzer relay
at Door Open.
Use UP/DOWN keys to set desired value.
after 60sec, if AL & BUZ parameters are
enabled.
Example : This Parameter is set to 60 Sec
& Door is open then Alarm/Buzzer will be
ON
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