Sub-Zero SZ-7524T User manual

INDEX
Sr.
No. Para. Description
1Set Point
3P2
4P3
5HS
6LS
7P4
8P5
9P6
Compressor relay set point.
High temperature limit.
Low temperature limit.
Maximum Set Point limit.
Minimum Set Point limit.
Differential for compressor relay ON condition.
Probe calibration for room.
Time delay (compressor relay restart after cutoff).
2Set other parameter.
Compressor relay ON time during probe fault.
10 Ot Minimum ON time for compressor relay.
Compressor relay status in probe fail.
11 E1
12 Cn
13 Cy
14
15
16
17
Compressor relay OFF time during probe fault.
19
20
21
E2
E3
E4
E5
Set type of defrost
Set drip time for defrost water to drain out.
Set post drip time.
Defrost duration during coil probe fail.
P7
P8
Defrost duration & manual defrost.
Defrost frequency.
P9 Power ON defrost delay.
L2
L3
L4
L5
L6
To set time delay between Evap. fan relay
restart time
Evap. Fan operation when compressor is OFF.
Evap. Fan differential (Hysteresis).
Probe 2 offset calibration (Evap. fan coil probe)
Evap. fan status during defrost.
L1 Evap. fan stop temp Coil.
L7 Defrost stop temperature (Evap Coil probe).
do1
do2
do3
CF0
CF1
Door Open fault Sensing delay.
Compressor / Fan Status on Door Open Fault.
Delay time for Temperature updating at door
open digital input fault.
Activate or deactivate Compressor Fault digital
input.
Compressor Fault digital input Sensing delay.
do0 Activate or deactivate door open digital input.
22
23
24
25
26
27
28
29
30
31
32
33
Change Password
Keypad Lock
Restore factory defaults
End Programming
Time delay at Power ON for alarm indication.
Delay the display of temperature.
dd
Ad
PA
LP
FS
EP
LED Indications
Password Function
Temperature Logging
User Selectable Default Values
CF2 Compressor / Fan Status on Compressor Fault
digital input.
CF4 No of retrials of compressor when Manual
reset is selected.
ddF Display during defrost.
nd Default (Normal) Display.
To set controller Resolution
rS
34
37
38
39
40
41
42
43
44
45
46
47
CF3 Set reset mode for Compressor output, on
Compressor Fault digital input.
35
Operating Messages
18 E6 Computation method for defrost.
36
48
CAUTION
WIRING: The probe and its corresponding wires should never be
installed in a conduit next to control or power supply lines. The electrical
wiring should be done as shown in the diagram. The power supply circuit
should be connected to a protection switch. The terminals admit wires of
upto 2.5sq mm.
Maintenance: Cleaning: Clean the surface of the controller with a soft
moist cloth. Do not use abrasive detergents, petrol, alcohol or solvents.
Notice: The information in this document is subject to change in order to
improve reliability , design or function without prior notice and does not
represent a commitment on the part of the company. In no event will the
company be liable for direct, indirect, special, incidental or consequential
damage arising out of the use or inability to use the product or
documentation, even if advised of the possibility of such damages. No
part of this manual may be reproduced or transmitted in any form or by
any means without the prior written permission of the company.
WARNING: Improper wiring may cause irreparable damage and
personal injury. Kindly ensure that wiring is done by qualified personnel
only.
To fix the unit, slide the fastener 1 through the guides 2 as per the
position shown in the figure. Move the fastener in the direction of the
arrow, pressing tab 3 it permits to move the fastener in the opposite
direction of the arrow.
Installation : Fixing and dimensions of panel models:
Controller :Controller should be installed in a place protected by
vibration, water and corrosive gasses and where ambient temperature
does not exceed the values specified in the technical data.
Probe :To give a correct reading, the probe must be installed in a place
protected from thermal influences, which may affect the temperature to
be controlled.
71mm
29mm
Panel cutout
3
1
2
35.3mm
71 mm
10mm
MAX
Panel Cutout and Dimensions :
Housing : Black ABS Plastic, Auto-extinguish
Front Cover : Polycarbonate Plastic V0 Grade
Dimensions : Frontal : 94 X 35.3 mm, Depth : 71mm
Resolution : +/- 1°C / 0.1°C
Power input : 230 Vac ±15 % , 50-60Hz Standard.
Panel Cutout : 29 X 71mm
Input : 2 NTC probe, SZ-N75T (Rubber Type Sensor)
O O
-50 C to 50 C (rS = 1)
Operating temp. : 0°C to 60°C (non-condensing)
Data storage : Non-volatile EEPROM memory
Relay output : All relay 8(3)A,250VAC
Mounting : Flush panel mounting with fasteners
9 LEDs for Indication
Connections : Screw terminal blocks.
Others on request.
Operating humidity : 20% to 85% (non-condensing)
Protection : IP65 Front (with gasket)
< 2.5sq mm terminal only.
Display : 3 X 17mm 7 segment display &
Storage temp : -25°C to 60°C (non-condensing)
Measuring Range : O O
-50.0 C to 50.0 C (when rS = 0.1)
Accuracy : +/- 1°C
TECHNICAL DATA
To set other
Parameters.
Touch & hold
key for
2 seconds.
Display will flash “P2”.
To select other parameters, use UP/DOWN
keys.
Set point
Function: To set compressor relay set point.
1
key for 2 seconds.
Touch & hold
SET
Display will show set value. The set point value can now be
modified by using the UP/DOWN key. After selecting the desired
value, touch the set key and user can see "- - -" which confirms
that the set point has been stored in memory.
Parameter List :
2
P2 Parameter Function: To set maximum allowable high
temperature limit.
3
O
Example: If this parameter is set to 50.0 C and the temperature
O
reaches or goes above 50.0 C, display will show Ht (High Temp.)
indicating that the temperature has reached or gone above the
value set in this parameter.
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
LS+1 HS-1 O
0 C
LS+1.0 HS-1.0 O
0.0 C
(Message on
display)
P3+1.0 O
50.0 C O 50.0 C
rS = 0.1 rS = 1
Min Max
Fac.
P3+1 O
50 C O 50 C
Min Max
Fac.
P3 Parameter Function: To set minimum allowable low
temperature limit.
4
O
Example: If this parameter is set to -50.0 C and the temperature
O
reaches or goes below -50.0 C, display will show Lt (Low temp)
indicating that the temperature has reached or gone below the
value set in this parameter.
(Message on
display)
O
-50 C P2-1 O -50 C
O
-50.0 C P2-1.0 O -50.0 C
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
Touch Sensitive Temperature Controller
Features :
2 NTC probes for cold room temp. + Evap. coil temperature.
0 0
Range : -50.0 C to 50.0 C (when rS = 0.1)
Relay outputs : Compressor + Defrost + Evap. Fan.
Compressor protection algoriithm.
Auto/Man defrosting facility (Time/Temp based).
0 0
-50 C to 50 C (when rS = 1)
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
20 C O 2 C
O
1 C
O
20.0 C O 2.0 C
O
1.0 C
P4 Parameter
7Function: To set the differential for
compressor relay ON condition.
Differential between cut out and cut in temperature can be set
O O
between 1.0 C to 20.0 C.
O
Example: If the set point is set at 10.0 C and differential (P4) is
O O
set at 2.0 C, then when the room temp reaches 10.0 C, the
compressor relay will cut out. Since the differential is 2.0, the
O O O
compressor relay will cut in (restart) at 12.0 C (10.0 C+2.0 C).
P6 Parameter
9Function: To set time delay between
compressor relay restart.
This parameter is used to protect the compressor from restarting
in a short period of time.
Example: If this parameter is set at 3 minutes, the compressor
relay goes OFF at the set point, 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.
Flashing
Time delay in progress
Min Max
Fac.
0 Min 99 Min 3 Min
P5 Parameter
O
10.0 C
O
-10.0 C O 0.0 C
8Function: To set room probe calibration.
To compensate for this error, user may need to add or minus the
degrees required to achieve the correct temperature.
In time it may be possible that the display may be offset by a
degree or so.
O
Example : The room temperature on the display is 28.0 C,
O
whereas the actual room temperature is 30.0 C. User will have to
set the P5 parameter to 2.0, which means that once out of the
programming mode, the room temperature on display will be
O O O
30.0 C (28.0 C+ 2.0 C).
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
10 C
O
-10 C O 0 C
Ot Parameter
10 Function: Minimum ON Time For
Compressor relay.
Example: If this parameter is set at 1Min and if the temperature
is achieved before 1 minute, then the compressor relay will
remain ON for minimum 1 minute, though set point is achieved.
This parameter is used to protect the compressor so that there is
enough time for oil to return back to the compressor. This delay
starts once the compressor relay is ON.
Min Max
Fac.
0 Min 20 Min 0 Min
E1 Parameter
11 Function : Compressor relay status in case
of Control Probe Failure.
= Compressor relay status is OFF.
= Compressor relay status is ON.
minutes OFF and Cy for minutes ON.
When set to
= Compressor relay performs a duty cycle for Cn for
Min Max
Fac.
Cy Parameter
13 Function : Compressor relay ON Time during
Control probe fault.
(This will be considered only when E1 is selected ) .
Example : If this parameter is set to 10 minutes, then
compressor relay will be ON for 10 minutes while performing the
duty cycle. Min Max
Fac.
1 Min 99 Min 10 Min
Cn Parameter
12
(This will be considered only when E1 is selected ) .
Function : Compressor relay OFF Time
during Control probe fault.
Min Max
Fac.
1 Min 99 Min 4 Min
Example : If this parameter is set to 4 minutes, then compressor
relay will be OFF for 4 minutes while performing the duty cycle.
E2 Parameter
14 Function : To set type of defrost.
E3 Parameter
15
Min Max
Fac.
0 Min 99 Min 3 Min
Function : To set drip time for defrost water
to drain out.
This is the time for which the fan, compressor, heater will stay
OFF so that the defrost water can drip & drain out.
rS = 0.1 rS = 1
rS = 0.1 rS = 1
HS Parameter Function: To set Maximum set point limit.
Once set at a particular value, this will not allow the set point to go
above this value.
Example: Setting this parameter at 50.0°C will not allow the set
point to go above 49.0°C (HS-1.0).
SP = Set Point
Min Max
Fac.
SP+1 O
50 C O 50 C
5
LS Parameter Function: To set Minimum set point limit.
Once set at a particular value, this will not allow the set point to go
below this value.
Example: Setting this parameter at -50.0°C will not allow the set
point to go below -49.0°C (LS+1.0).
6
Min Max
Fac.
O
-50 C SP-1 O -50 C
SP = Set Point
Min Max
Fac.
SP+1.0 O
50.0 C O 50.0 C
Min Max
Fac.
O
-50.0 C SP-1.0 O -50.0 C
E4 Parameter
16
Min Max
Fac.
0 Min 99 Min 1 Min
Function : To set post drip time .
Example : This is the time where compressor goes ON after drip
time.
Note :In electric defrost compressor will ON only if Room temp >
SP + diff. but it will not check this in hot gas defrost.
E5 Parameter
17 Function: Defrost duration during Coil
probe failure (Only manual).
Min Max
Fac.
1 Min 10 Min 5 Min
Example: If this is set to 5 min, then manual defrost for 5 min
will take place during Coil probe fail.
= Electric defrost in which case compressor is OFF.
= Hot gas defrost where compressor is ON.
Min Max
Fac.
CONTROLLER
Side Lock
GASKET
PANEL
Screw
Front Loading Bezel
(Not required if Front
Loading screws used.)
(Not required if side locks used.)
TM
SZ-7524T
Operating Instructions
L1 Parameter
22 Function: Evap. fan stop temp (Coil).
This setting is used to limit the max temperature beyond which
the Evaporator fan will cut OFF.
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
-50.0 C O 50.0 C O 2.0 C O -50 C O 50 C O 2 C
Example : If this parameter is set to 2.0ºC, then Evap. Fan
will cut OFF at 2.0ºC.
E6 Parameter
18
Min Max
Fac.
Function: To set computation method for
defrost.
: Defrost Frequency time calculation will start once the
Controller is ON.
Example: If this parameter is set to 6Hrs, then defrost will
happened at every 6Hrs.
: Defrost Frequency time calculation will be done only
When Compressor is ON.
Example : If this parameter is set to 6Hrs, then after every
6Hrs of Comp. ON defrost will happen.
P9 Parameter
Min Max
Fac.
99 Min0 Min 30 Min
21 Function : To set power ON defrost delay.
Example : If P9 parameter is 30 minutes then at power after 30
minutes defrosting will take place once.
P8 Parameter
P7 Parameter
19
Min Max
Fac.
0 Min 99 Min 30 Min
Function: To set Defrost duration & Manual
Defrost.
Example : If P7 is set to 15 Mins, E6 is set to rEt and P8 is
set to 1 Hr then after every 1 Hr defrosting will take place for
15 mins.
This is maximum amount of time allowed for defrost. If set to
0, there will be no defrost cycle.
20
Function : To set Defrost frequency.
Min Max
Fac.
1 Hr 31 Hrs 6 Hrs
This is the amount of time between two defrost cycles.
Example : Same as P7 parameter.
20
= Evaporator Fan will be ON /OFF independent of
Compressor Status according to Coil probe
temperature.
= Evaporator fan is OFF when compressor is OFF, and
it will be ON depending on Coil Temperature and its
set point .
L4 Parameter
25 Function: Evap. Fan differential
(hysterisis).
0
Example: If L1 parameter is set to 2.0 C, and the L4 is set to
0 0
2.0 C, then Evap. fan will cut OFF at 2.0 C and restart only at
0
0.0 C
L2 Parameter
23 Function: To set time delay between Evap.
fan relay restart time
Min Max
Fac.
0 Min 20 Min 1 Min
Example : If this parameter sets at 3 minutes, the Evap. Fan
relay will cutoff at the temp. set by L1 parameter but the fan will
not come ON for a minimum of 3 minutes even if L4 is achieved
earlier.
L3 Parameter
24 Function: Evap. Fan operation when
compressor is OFF.
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
1.0 C O 20.0 C O 2.0 C O 1 C O 20 C O 2 C
Min Max
Fac.
L5 Parameter
26 Function: To set probe 2 offset calibration
(Evap. fan coil probe).
In time it may be possible that the temp. on the display 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
0 0
correct temperature. Setting value is from -10.0 C to 10.0 C
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
-10.0 C O 10.0 C O 0.0 C O -10 C O 10 C O 0 C
L7 Parameter
28 Function : To set Defrost stop temperature
(Evap. coil probe)
This is the maximum temperature allowable at which the
defrost process will stop.
Defrost will stop according to P7 & E5 parameter,
whichever is achieved earlier.
rS = 0.1 rS = 1
Min Max
Fac.
Min Max
Fac.
O
-50.0 C O 50.0 C O 8.0 C O -50 C O 50 C O 8 C
L6 Parameter
27 Function: Evaporator Fan status during
defrost.
Min Max
Fac.
= In Manual or Auto Defrost ( Hot gas or Heater ), Fan
will be OFF.
= In Manual or Auto Defrost ( Hot gas or Heater ) , Fan
will be ON.
do0
Parameter
29 Function : To activate or deactivate door
opendigital input function.
is closed.
is open.
= Door open digital input is disabled.
= Door open digital input is activated when contact
= Door open digital input is activated when contact
Min Max
Fac.
Example : If this parameter is set to 8.0ºC, then if defrosting is
in progress then when temperature reaches 8.0ºC, the defrost
process will stop.
Suggested Wiring
Caution:Wiring for 230Vac load only
1 2 347910 11 12
ROOM
COIL
DOOR
6
5
NC NONONOC
COMP
FAN
DEFROST 230VAC
50-60Hz
TO SZ-N75T
To Heater
8(3)A 250VAC max
To Fan
8(3)A 250VAC max
To Compressor
8(3)A 250VAC max
P
N
8
AUX
keys pressed simultaneously, display
will show Room Temperature.
If "nd" parameter is set to or and
+
To view coil temperature.
USER INTERFACE
UP /
Coil Scroll through parameters & Increases
parameter value.
In Program mode:
Touch and hold for 2sec to enter into program
mode.
In program mode : Decreases parameter value
Down/
Program
In program mode: set/save the changed value
of parameter.
Set
This key will mute the visual alarm.
This key will start a manual defrost cycle if
pressed for 2 sec. Press again for 2 seconds it
will come out of defrost mode and STOP defrost
cycle.
If P7 parameter is set to 0, or Coil temp. is
greater than defrost stop temp. this key will
remain inactive.
Defrost /
Reset
Also used to check LL & LH log.
+
COMMON
*
“ “
COMMON for AUX, DOOR,
COIL, ROOM

Room Probe fail
PP
0 0
> 50 C or <-50 C (when
Probe short circuit, circuit
open or without probe, or
0
temperature is > 50.0 C or
0
<-50.0 C (when rS = 0.1) &
rS = 1)
LP Keypad lock
Keypad is locked
High temperature alarm
Ht Low temperature alarm
Lt
Temperature below the
minimum low
temperature limit.
OPERATING MESSAGES
Temperature above the
maximum high
temperature limit.
48
dF Defrost in progress.
Defrost
LL Last low temperature
Last low temperature
logged.
LH Last high temperature
Last high temperature
logged.
rS In log function: When LL
and LH values are
cleared.
CF AUX (Auxiliary) Input
Compressor fault
present.
do Digital input
Door open.
CPP Coil Probe fail
Probe short circuit, circuit
open or without probe, or
0
temperature is > 50.0 C or
0
<-50.0 C (when rS = 0.1) &
0 0
> 50 C or <-50 C (when
rS = 1)
Password function
" " or " " keys.
Touch & hold " " key for 2sec. Display will flash "P2"
parameter if "PA" value is kept "0". If other than "0", then "PA'
and "0" will flash. Use " "and " " keys to enter the
password. On entering correct value, display will flash the first
parameter "P2". User can scroll through parameters using
In Program mode:
In Set mode:
Touch & hold "SET" key for 2sec. Display will flash set point
value if “PA” parameter value is kept to “0”. If other than “0”,
then display will flash “PA” and “0”. Use " " or " " to enter
the password. On entering correct value, display will flash set
point value. User can set desired value using " "or " "
keys. To save the modified value use "SET" key.
How to reset the Logged values
While the display is showing the logged values, if user
touch & hold the "SET" key for 1sec, the logged values will
be cleared and "rS" will be displayed.
Log Values will get reset after Power ON/OFF.
High and Low temperature logging function
How to see the logged values:
LL : Last Low temperature
LH : Last High temperature
Touch and hold " " key for 1sec. display will flash “LL” and
the corresponding temperature for 4 seconds. After this,
display will flash “LH” and the corresponding temperature for
4 seconds and come out of Log mode and will display
Control probe temperature.
EP Parameter
46 Function: To end programming.
Once the key is pressed, the controller goes
into the normal mode and displays the
temperature and all settings are recorded.
To end
programming
press "SET" key
PA Parameter
43
Min Max
Fac.
-999 999
-
Function : To change Password.
If password is 0, user can directly access set/program mode.
If the password is kept other then 0, user need to enter correct
password to enter into set/program mode.
User cannot enter into program mode & set mode, if correct
password is not entered.
LP Parameter
44
Min Max
Fac.
Function: To lock keypad.
When locked all parameters can only be viewed, but not
modified.
Note : If LP parameter is set to and if user tries to change
any parameter value, " LP" will flash on the display.
This parameter is used to lock the keypad so that tampering is
not possible by by-standers.
= keypad locked
= keypad unlocked
Flashing
FS Parameter
45 Function : To restore default settings of the
controller.
When set to 1 all parameters are programmed to factory set
values.
Useful to debug setting related Problems.
2 = FS as per user define
When set to,
0 = FS is disable.
1 = FS as per default value. Min Max
Fac.
02-
OFF: Compressor is OFF.
ON: Compressor is ON.
Compressor
LEDS
ON: Defrost in progress.
FLASHING :
Drip or post drip
time.
Defrost
47
Fan
Evaporator Fan is in
time delay.
FLASHING:
OFF: Evaporator Fan is
OFF.
ON: Evaporator Fan is
ON.
Time Delay
ON: Compressor is ON
and in time delay
for switching OFF.
(Ot parameter)
FLASHING:
Compressor is in
time delay and
about to start.
ON: Door Open.
Alarm
do, CPP
ON : Ht, Lt, PP, CF,
ON: Auxiliary fault is
present.
ON: When temperature is displayed.
Door Open
User selectable Default values
This can be done by following steps:
User can set their own set of Default Set values for all parameters. If
user wants to activate this feature, Program mode must be accessed
and then change Factory set (FS) parameter accordingly.
Modify values of set point and other parameters as desired by
entering set mode and program mode respectively.
Select FS parameter and touch "SET" key. While display
flashing “0” , touch and hold " " for 10sec. Controller will flash
"-2". Then touch "SET" key. All the user defined parameter
values will be stored as ‘User Default set’.
If user wants to use this set of parameters, access Program
mode and set the FS parameter to "2". Controller will restore the
user defined parameter values.
(Note: Keypad parameter LP and User lock parameter will be
taken into consideration while modifying this parameter.)
Disclaimer: This manual & its contents remain the sole property of
PVR CONTROLS . India and shall not be reproduced or distributed
without authorization. Although great care has been taken in the
preparation of this document, the company or its vendors in no event
will be liable for direct, indirect, special, incidental or consequential
damage arising out of the use or inability to use the product or
documentation, even if advised of the possibility of such damages.
No part of this manual may be reproduced or transmitted in any form
or by any means without the prior written permission of the company.
PVR CONTROLS., reserves the right to make and changes or
improvements without prior notice.
Warranty: This product is warranted against defects in materials and
workmanship for a period of one year from the date of purchase.
During the warranty period, product determined by us to be defective
in form or function will be repaired or, at our option, replaced at no
charge. This warranty does not apply if the product has been
damaged by accident, abuse, and misuse or as a result of service or
modification other than by the company. This warranty is in lieu of any
other warranty expressed or implied. In no event shall the company
be held liable for incidental or consequential damages, including lost
revenue or lost business opportunity arising from the purchase of this
product.
02 / 03.02.2020
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Min Max
Fac.
dd Parameter
40 Function : This parameter is used to delay
the display of temperature update by the
set in this parameter.
Each value corresponds to 5 seconds, if the value is set to 1, it
corresponds to 5 seconds, if it is set to 2, it corresponds to 10
seconds and so on.
Min Max
Fac.
036 0
For example, if this parameter is set to 1, temperature on the
display will be updated after 5 seconds. The same value will be
considered for calculation and logging.
Display delay parameter is applicable only when temperature
is increasing (rising). When temperature is decreasing (falling)
this parameter will not be applicable.
If this parameter is set to 0, this feature will be disabled.
CF4
Parameter
37 Function : No of retrials of compressor when
Manual reset is selected.
Min Max
Fac.
110 5
Example : As mentioned in CF3
ddF
Parameter
38 Function : This parameter is used to select
display while the Defrost Cycle is in
progress.
Ad Parameter
41 Function : This parameter is used to set the
time delay at Power ON for Alarm
Indication.
Example: If this parameter is set to 20 minutes, once the
controller is powered ON, no fault indication will be activated
for 20 minutes.
If Control Probe Temperature reaches or drops below P3
parameter value, Low Temperature (Lt) fault will displayed.
If Control Probe Temperature reaches or goes above P2
parameter value, High Temperature (Ht) fault will displayed.
Alarm delay is used only for High Temperature and Low
Temperature, but not for Room Sensor fail.
O
Differential of 1 C is considered for clearing the fault.
Min Max
Fac.
0 Min 99 Min 20 Min
rS Parameter
42 Function : To set controller resolution.
Note : Temperature and parameter will also change accordingly.
0
This parameter when set to 1,it will take all parameter in 1 C
resolution.
0
This parameter when set to 0.1, it will take all parameter in 0.1 C
resolution.
Min Max
Fac.
0.1 1-
nd Parameter
39 Function : Default (Normal) display
= Room Temperature.
= Coil Temperature.
= Set Point
Min Max
Fac.
Function : To set compressor / fan status
on Compressor fault digital input.
CF2
Parameter
35
Min Max
Fac.
= Fan will be OFF.
= No action will be performed.
= Compressor will be OFF.
= Fan and Compressor will be OFF.
= Room Temperature
= Defrost Label
CF1
Parameter
34
Min Max
Fac.
0 sec 99 sec 5 sec
Function : To set compressor fault digital
input sensing delay.
Example : If CF1 = 5seconds and if compressor digital input
(Fault) is present for 5 seconds then fault is detected.
CF3
Parameter
36 Function : To set reset mode for
Compressor output, on Compressor fault
digital input.
= Auto Reset.
= Manual Reset after CF4 retrials in 1 hour.
If this parameter is set to "AUTO" mode then COMP. fault will
be cleared automatically when it is healthy.
Example: If this parameter set to "MAN" mode & CF4 is set
to 5 then, COMP. fault will be cleared after 5 retrials only
after pressing reset key for 2 seconds.
ON
Fault is present
Min Max
Fac.
CF0
Parameter
33 Function : To activate or deactivate
compressor fault digital input.
= Compressor fault digital input is disabled.
contact is closed.
= Compressor fault digital input is activated when
contact is open.
= Compressor fault digital input is activated when
do3
Parameter
32 Function : To set delay time for temperature
updating at Door open digital input fault.
Min Max
Fac.
0 sec 180 sec 10 sec
do2
Parameter
31
Min Max
Fac.
Function : To set compressor / fan status
on Door open fault.
= Compressor will be OFF.
= No action will be performed.
= Fan will be OFF.
= Fan and Compressor will be OFF.
After over the Temperature hold duration display temperature
O
will be increased by 0.1 C at every 1sec until it reaches current
Room Temperature.
Example : This Parameter is set to 60sec, Room Temperature
O
is -18.0 C & Door open condition occurs then Room Temp
O
value -18.0 C at Door open condition will be held for the 60sec
even if Room Temperature is rising.
Min Max
Fac.
do1
Parameter
30
Min Max
Fac.
0 sec 99 sec 5 sec
Function : To set door open fault sensing
delay.
Example : If d01 = 5seconds and if digital input (Fault) is
present for 5 seconds then fault is detected.