Sub-Zero CRC-2052 User manual

All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

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.
All manuals and user guides at all-guides.com

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.
All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

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.
All manuals and user guides at all-guides.com

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
All manuals and user guides at all-guides.com

19
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
20
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
+1.0) A
(C-UL 50.0A 30.0A
Range
Min Max Fact. Set
Controller with 50A CT
After over the Temperature hold duration
display temperature will be increased by
O
0.1 C at every sec until it reaches current
Room Temperature.
increasing.
C-UL
Parameter
30
Function : Under load limit for
compressor current.
To change the C-UL parameter,
press the set key.
Example : If C-UL= 1.0A and compressor
current is less than 1.0A then and exists till
C2 current sensing delay then it is
registered as UL fault. Compressor will
get OFF on this fault. If after 3 retries
within 1 Hour current drawn is still less
than 1.0Amp the controller will trip the
compressor on fault and activate
respective alarm relay. Also display will
flash ‘C-UL’. Controller will go in manual
reset mode.
Use UP/DOWN keys to set desired value.
0.0A (C-OL
-1.0)A
1.0A
Range
Min Max Fact. Set
C-OL
Parameter
31
Function : Over load limit for compressor
current.
To change the C-OL parameter,
press the set key.
Use UP/DOWN keys to set desired value.
Example : If C-OL= 15.0 A and
compressor current is greater than 15.0 A
then and exist till C2 current sensing delay
then C-OL fault exists and flash on
display. Compressor will be tripped on this
fault.
NOTE: 20/50A CT option available
while ordering controller.
(C-UL
+1.0) A
20.0A 15.0A
Range
Min Max Fact. Set
Controller with 20A CT
Use UP/DOWN keys to set desired value.
Example : If C2 = 5 sec then, any current
fault will be valid only when it exists for
more than 5 sec.
To change the C2 parameter,
press the set key.
Parameter
C2
32
Function : Current sensing time delay.
5 Sec 120 Sec 5 Sec
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
If this parameter is set to
ENB : HP sensing is enabled.
Example :
DIS : HP sensing is disabled.
To change the D0 parameter,
press the set key.
D0
Parameter
33
Function : To enable or Disable HP
sensing.
DIS ENB ENB
Range
Min Max Fact. Set
Setting this parameter to disable will
ignore HP fault for compressor. If this
parameter is set to Enable then controller will
detect HP trip.
Use UP/DOWN keys to set desired value.
ENB : LP sensing is enabled.
Example:
If this parameter is set to
DIS : LP sensing is disabled.
To change D1parameter,
press the set key.
DIS ENB
Parameter
D1
34
ENB
Function : To enable or disable LP
sensing.
Range
Min Max Fact. Set
Setting this parameter to disable will
ignore LP fault for compressor. If this
parameter is set to Enable then controller will
detect LP trip.
All manuals and user guides at all-guides.com

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
21
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
22
D2
Parameter
35
To change D2 parameter,
press the set key.
0V 230V
Function : Fault sensing logic.
0V
0V : 0V at HP/LP/AUX input will be
sensed as fault and trip the
compressor.
230V : 230V at HP/LP/AUX input will be
compressor.
Use UP/DOWN keys to set desired value.
sensed as fault and trip the
Range
Min Max Fact. Set
To change D3 parameter,
press the set key.
0 Sec
36
Min Min
Use UP/DOWN keys to set desired value.
Example : If this parameter is set to 5
sec,then LP fault will be sensed only when
it present continuously for 5 Secs.
180 Sec 30 Sec
D3
Parameter
Function : To set LP sensing delay.
Range
Max Fact. Set
Range
Max Fact. Set
press the set key.
To change D4 parameter,
Parameter
D4
37
Function : To set reset mode for HP fault.
MAN AUTO AUTO
Range
Min Max Fact. Set
Range
Min Max Fact. Set
If this parameter set to “MAN” mode HP
fault will be cleared only after pressing
reset key for 2 seconds.
If this parameter is set to “AUTO” mode
HP fault will be cleared automatically
when it is healthy.
MAN : Manual Mode.
Use UP/DOWN keys to set desired
value.
AUTO : Auto mode.
TON
Parameter
press the set key.
To change TON parameter,
39
Range
Min Max Fact. Set
Range
Min Max Fact. Set
At room probe fail condition when E1
parameter is selected as 'CYC' then the
ON cycle is specified by TON parameter.
1 Min 30 Min 10 Min
Function : To set ON cycle time for
compressor at room probe fail.
Use UP/DOWN keys to set desired value.
To change E1 parameter,
press the set key.
Parameter
E1
38
Range
Min Max Fact. Set
Range
Min Max Fact. Set CYC : Relay performs a duty cycle of
OFF : Relay will stay OFF.
ON : Relay will stay ON.
When set to
as per TON & TOFF .
ON OFF CYC
Function : To set Compressor Relay
status on Probe Failure.
Use UP/DOWN keys to set desired
value.
press the set key.
To change TOFF parameter,
TOFF
Parameter
40
Range
Min Max Fact. Set
Range
Min Max Fact. Set
At room probe fail condition when E1
parameter is selected as 'CYC' then the
OFF cycle is specified by TOFF
parameter.
1 Min 30 Min 4 Min
Function : To set OFF cycle time for
compressor at room probe fail.
Use UP/DOWN keys to set desired
value.
E7
Parameter
will be dispalyed.
will scroll.
TEMP : During defrost, temperature
DEFR : During defrost, 'Defrost ON'
Use UP/DOWN keys to set desired value.
41
Function : To set Display at defrosting.
To change E7 parameter,
press the SET key.
TEMP DEFR TEMP
Range
Min Max Fact. Set
Range
Min Max Fact. Set
All manuals and user guides at all-guides.com

Parameter
CRH
47
Function : To view Compressor run
Hours.
It will display compressor run hours. It's a
read only parameter.
NO YES NO
CCRH
48
Function : Clear Compressor Run
Hours.
If this parameter is set to ‘YES’
compressor run hours (CRH) are cleared.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
24
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Parameter
E8
Use UP/DOWN keys to set desired value.
Example: If this is set to 10 min, then
manual defrost for 10 min will take place
during Coil probe fail.
42
Function : Defrost duration during Coil
probe failure.
To change E8 parameter,
press the SET key.
1 Min 15 Min 5 Min
Range
Min Max Fact. Set
Range
Min Max Fact. Set
To change PDN parameter,
press the set key.
PDN
Parameter
45
Range
Min Max Fact. Set
Range
Min Max Fact. Set
DIS EDEF DIS
Function : To activate Solenoid Valve
relay.
Use UP/DOWN keys to set desired value.
Example : If this parameter is set to 7 mins
then, when light is switched ON, after 7
mins it will be switch OFF automatically.
LD
Parameter
Use UP/DOWN keys to set desired value.
43
Function : To set time delay to switch
off the light .
To change LD parameter,
press the SET key.
0 Min 30 Min 7 Min
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Parameter
LSD
Use UP/DOWN keys to set desired value.
44
Function : This parameter is used to
enable / disable light relay ON at door
open.
To change LSD parameter,
press the SET key.
DIS ENB ENB
Range
Min Max Fact. Set
Range
Min Max Fact. Set
This parameter is used set the time delay
to automatically switch OFF the light. If LD
is set to 0 then this parameter is disabled.
If this parameter is set to Enable then
whenever Door get open, the Light Relay
will be ON.
If this parameter is set to Disable then
Light Relay will be ON/OFF functioning
manually and as per LD parameter.
09999 0
To change the PW parameter,
press the set key.
PW
Parameter
46
Function : To change password.
Use UP/DOWN key to change the
password.
User can enter into program mode
only if correct password is entered. If the
password is wrong it will show ‘INVALID
PASSWORD’.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
ETMP : If this parameter is set to ETMP
then SV relay will be ON/FF & pump down
at Set point.
active only with Compressor except
Hotgas defrost.
EDEF : Pump down enable at Set point
when heater defrost condition occurs.
DIS : Pump down disable and SV relay will
Example :
ETMP : Pump down enable at Set point
when compressor tripped on Set Point.
EDEF : If this parameter is set to EDEF
then SV relay will be ON/OFF on SP &
pump down only at heater defrost
condition.
Cont.
23
Changes Suggested by Pradnya,
1. Factory set Value of C-OL for 50.0A CT will change from 25.0A to 30.0A
2. PDN Parameter – DIS : Pump down disabled & SV Relay will active only with Compressor except Hotgas defrost.
All manuals and user guides at all-guides.com

25
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
ID
Parameter
This parameter is used to set the Device
ID for the controller.
49
Function : To set Device ID.
To change Device ID
parameter, press the SET key.
1 240 -
Range
Min Max Fact. Set
Range
Min Max Fact. Set
LP
Parameter
50
To change Keypad Lock
parameter, press the set key.
NO YES NO
Function : To activate Keypad Lock.
If the keypad is locked “LOCK” message
will be displayed..
This parameter can lock the keypad so
that tempering is not possible by by-
standers.
NO : deactivates keypad lock.
YES : activates keypad lock.
On activation, all the parameters can only
be viewed, but not modified.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Parameter
PO Function : To enable/disable Power
Switch.
23
51
To change PO parameter,
press the SET key.
Use UP/DOWN keys to get desired
value & press SET key to confirm.
DIS : Disable power switch
ENB : Enables power switch
DIS ENB DIS
Range
Min Max Fact. Set
Range
Min Max Fact. Set
LED TEMP LED
To change PDIS parameter,
press the SET key.
Parameter
PDIS Function : To set display at power OFF
mode.
Use UP/DOWN keys to set desired value.
OFF : Display will show OFF.
TEMP : Display will show Temperature.
LED : Display Will be Blank.
At power OFF mode power OFF LED
will glow & display will be as below,
23
52
Range
Min Max Fact. Set
Range
Min Max Fact. Set
NO YES NO
To change FS parameter,
press the SET key.
FS
Parameter
Function : To restore default settings of
the controller.
Use UP/DOWN keys to set desired value.
When set to YES all parameters are
pr o g r a m m e d t o fac t o r y v a l u e s .
Useful to debug setting related problems.
23
53
Range
Min Max Fact. Set
Range
Min Max Fact. Set
EP
Parameter
Once the set key is pressed, the controller
goes into the normal mode and displays
the Room Temperature and all settings
are recorded.
54
Function: To exit from program mode.
parameter, press the SET key.
To exit programming
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
26
To again switch to ACTIVE WORKING
MODE, press power switch again for 2
seconds. All leds and display will flash and
enter into NORMAL WORKING MODE.
If key press for 2 seconds controller
will go in stand by mode, display will be as
per “PDIS” parameter.
Controller has power switch, which if
enable puts controller in active or stand by
state.
All manuals and user guides at all-guides.com

27
Technical Data
Light Relay : 5A/230vac
Room & Evap Temperature :
Accuracy : +/-1 Amp.
Condenser Relay : 10A/230vac
HP, LP, Auxiliary / CTH(Compressor Thermal) , Oil Pressure Switch(OPS),
Digital Inputs:
0 0
Range : -50.0 C to 50.0 C
Alarm Relay : 5A/230vac
0 0
Probe Tolerance at 25 C : +/-0.3 C.
0
Accuracy : +/-1 C.
Compressor current (R,Y,B)
Door, SPPR, R-Ph, Y-Ph, B- Ph.
1) Temperature sensor:
Baud Rate : 9600
Sensor Type : NTC Thermistor.
Sensors :
Buzzer : Internal
Device ID : 1 (By Default)
Analog I/p:
0
Resolution : 0.1 C.
LSV Relay : 10A/230vac
Resolution : 0.1Amp.
RS485 Connectivity : Modbus RTU Protocol
Mounting : Wall mounting.
Controller : CRC-2052
0 0
Operating Temp : 5 C to 50 C(non-condensing).
0 0
Storage temp : -20 C to 70 C(non-condensing).
Output :
Defrost Relay : 5A/230vac
Sheet Metal : (H)450 x (W) 400 x (D)200 mm
Compressor Relay : 5A/230vac
Evap. Relay : 5A/230vac
requirement)
4 sq. mm wire.
Display : 4 Digit, 1” Dot matrix Display and 13 LEDs for
Housing : Plastic / Sheet Metal (as per customer
Connection : Spring clamp terminal block.
3Phase Supply with Neutral
indication.
Data Storage : Non-Volatile EEPROM Memory.
Power Input (Options) : 415Vac +/-10%, 50-60Hz.
Dimensions : Plastic : (H)400 x (W) 300 x (D)135 mm
All manuals and user guides at all-guides.com

IndexIndex
To set Reference Voltage. 30
30
DESCRIPTION
PARAMETER
Pg.
No.
To set program mode. 30
To set Undervoltage Limits.
32
To set Un Balance Value.
To set Time Delay.
32
To set Calibration of Voltage.
To set Calibration of Voltage.
To set Calibration of Voltage.
To set Display mode.
32
33
31
31
31
33
33
34
To Restore factory defaults.
End programming.
To set Over voltage Limits.
35
35
Technical Data.
Front View & Connection Diagram.
To set fault recover delay.
Get to know your Controller. 29
Introduction 29
Instruction Manual
LVM (Line Voltage Monitor) Three Phase VMRC-10/3
Introduction
VMRC-10/3 is three phase Line voltage monitor (LVM) used to protect device
from Single Phasing, voltage unbalance, phase reversal and under/over
voltage. It shows real time voltages between phase and neutral.
There is an Output of alarm relay is given to the controller as SPPR input.
Features are easily understood by examples in the instruction below.
Get to Know Your Controller
VMRC-10/3
RELAY
NCCNO
78 9
R
15 17 19 21
Y B N
29
28
All manuals and user guides at all-guides.com

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
03
Function : To set Undervoltage Limits.
To change the uV parameter,
press the set key.
5V 75V 35V
Range
Min Max Fact. Set
04
Function : To set Un Balance value.
To change the unb parameter,
press the set key.
10V 120V 60V
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
If the a/c voltages goes below this
limit will trip respective a/c on
undervoltage(”Uv”) fault.
Example : Under voltage is calculated
depending on Reference voltage - Uv
value. i.e Uv Set Point = Ref - Uv , When
controller trip on Uv Fault it will recover
when input voltage above (Ref – (Uv /2).
Unbalance fault raised when voltage
difference between any of two phases
goes above Unb value and recovers when
the difference is less than (UNB/2).
Use UP/DOWN keys to set desired
value.
05
Function : To set time delay.
To change the ttd parameter,
press the set key.
0Sec 60Sec 10Sec
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
Time delay provided to avoid false
triggering, when any fault last more than
TTD value then only fault is raised and this
fault is applicable to Under voltage, Over
voltage and Unbalance fault.(i.e., In case
of Phase Loss or Phase sequence fault
alarm will come immediately).
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
01
Function : To set Reference voltage.
To change the rEF Parameter,
press the set key.
381V 415V 415V
Range
Min Max Fact. Set
02
Function : To set Overvoltage Limits.
To change the oV parameter,
press the set key.
5V 75V 35V
Range
Min Max Fact. Set
To set other parameter
Press & hold PRG key for
4 seconds
To go to other parameters,
use up / down keys.
Display will show ‘rEF’ and scroll the
description of the parameter.
Use UP/DOWN keys to set desired
value.
If the a/c voltages goes above this
limit will trip respective a/c on
Overvoltage(”Ov”) fault.
Example : Over voltage is calculated
depending on Reference voltage + Ov
value. i.e, Ov Set Point = Ref + Ov , When
controller trip on Ov Fault it will recover
when input voltage fall below (Ref - (Ov
/2).
Use UP/DOWN keys to set desired value.
Base reference voltage to calculate under
voltage and over voltage values.
Min and Max value will change
according to display type for settings.
Example : If dsP is L-L then Min= 381V,
Max= 415V.
30 31
All manuals and user guides at all-guides.com

-15V 15V 0V
08
Function : To set calibration of voltage
for y-b or y-n phase.
To change the Cyb parameter,
press the set key.
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-L then it sets calibration for
y-b.
When dsP is L-n then it sets calibration for
y-n.
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
06
Function : To set fault recover delay.
To change the tdr parameter,
press the set key.
0Sec 240Sec 10Sec
Range
Min Max Fact. Set
Time delay provided to add delay in fault
recover time, to avoid sudden fault
triggering and reset.
Use UP/DOWN keys to set desired
value.
07
To change the CrY Parameter,
press the set key.
-15V 15V 0V
Range
Min Max Fact. Set
Function : To set calibration of voltage
for r-y or r-n phase.
When dsP is L-L then it sets calibration for
r-y.
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-n then it sets calibration for
r-n.
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
When dsP is L-n then it sets calibration for
b-n.
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-L then it sets calibration for
r-b.
-15V 15V 0V
09
Function : To set calibration of voltage
for r-b or b-n phase.
To change the Crb parameter,
press the set key.
Range
Min Max Fact. Set
10
Function : To set view display mode.
To change the dsP parameter,
press the set key.
L-L L-n L-L
Range
Min Max Fact. Set
There are two type of display output, Line
to Line Voltage (L-L) and Line to Neutral
(L-n), Depending on this parameter REF
parameter also changes.
Use UP/DOWN keys to set desired
value.
nO YES nO
11
Function : To restore the default settings
of the controller.
To change the FS parameter,
press the set key.
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
When set to 1, all parameters are
programmed to factory values.
32 33
All manuals and user guides at all-guides.com

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Once the set key is pressed, the controller
goes into the normal mode and displays
the voltage readings.
12
Function :To end programming.
To change the end parameter,
press the set key.
Technical Data
Three Phase Voltage Monitor (VMRC- 10/3)
Front View & Connetion Diagram for
RELAY
NCCNO
78 9
R
15 17 19 21
Y B N
General Specification :
Under voltage and Over voltage detection.
Application : Voltage and phase sequence monitoring and controlling.
Connections : Screw terminals : < 2.5sqmm one wire/terminal only.
Mounting : Din rail mounting.
Main Functions : Voltage Monitoring.
Phase Sequence Monitoring.
Phase Loss and Phase Unbalance detection.
Uv and Ov Detection.
Settable Uv and Ov Parameter.
Input : R, Y, B Phases and Neutral Input.
Output : Alarm Relay : 5A Resistive.
Input Voltage Range from 100VAC to 265VAC.
Dimensions : Front : 70mm X 45mm,
Depth : 72.3 mm
VMRC-10/3
34 35
All manuals and user guides at all-guides.com

36
All manuals and user guides at all-guides.com