Sub-Zero SZ-CR2 User manual

SZ-CR2
DUAL SET POINT COLD ROOM
CONTROLLER
Instruction Manual

SZ-CR2 1
Index
Parameter
Description
Page No.
Introduction
4
Technical Data
5
User Interface
6
How to change the Parameter Value
7
Set Mode
7
Set Point for Compressor1 Relay.
7
Set Point for Compressor2 Relay.
8
End Programming in Set Mode.
8
Program Mode
9
Compressor Selection.
9
High Temperature Alarm Set Point for Control (Main)
Probe.
9
Low Temperature Alarm Set Point for Control (Main)
Probe.
10
Maximum Set Point Limit.
10
Minimum Set Point Limit.
11
Differential for Compressor.
11
Control (Main) Probe Calibration.
12
Time Delay between Compressor Relay Restart.
12
Minimum ON Time for Compressor Relay.
12
Compressor Relay status in Sensor Fail Condition.
13
Compressor relay OFF Time during Sensor Fail Condition.
13
Compressor relay ON Time during Sensor Fail Condition.
13
To select simultaneous or either defrosting of Two
Compressors.
13
Type of computation for Defrost Time Duration.
14
Defrost duration for Compressor1.
14
Defrost duration for Compressor2.
14
Defrost Frequency for Compressor1.
14-15
Defrost Frequency for Compressor2.
15
Power ON Defrost Delay for Compressor1.
15
Power ON Defrost Delay for Compressor2.
15
Activate/Deactivate Door Open Digital Input.
16
Fault Sensing Delay for Door Open Digital Input.
16
Output status on Door Open Fault.
16
Delay time for Temperature updating Door Open Digital
Input Fault.
16
Time duration to start Compressor with High Set Point.
16-17

SZ-CR2 2
Index
Parameter
Description
Page No.
Minimum ON/OFF time between two Compressors.
17
Time interval at which the Set Point for Compressors will
get interchanged.
17
Set Point Interchange on Fault.
18
Activate/deactivate HP Fault Digital Input for Compressor1.
18
Compressor1 HP Fault Digital Input sensing delay.
18
Reset mode for Compressor1 output, on Compressor1 HP
Fault Digital Input.
18-19
No. of retrials of Compressor1 HP Fault Digital Input.
19
Activate/deactivate Compressor1 LP Fault Digital Input.
19
Compressor1 LP Fault Digital Input Sensing Delay. (Surge)
19
Compressor1 LP Fault Digital Input Sensing Delay. (Normal)
20
Reset mode for Compressor1 output, on Compressor1 LP
Fault Digital Input.
20
No. of retrials of Compressor1 LP Fault Digital Input.
20
Activate/deactivate Compressor1 SPP Fault Digital Input.
21
Activate/deactivate Compressor2 HP Fault Digital Input.
21
Compressor2 HP Fault Digital Input sensing delay.
21
Reset mode for Compressor2 output, on Compressor2 HP
Fault Digital Input.
22
No of retrials of Compressor2 HP Fault Digital Input.
22
To activate/deactivate Compressor2 LP Fault Digital Input.
23
Compressor2 LP Fault Digital Input Sensing Delay. (Surge)
23
Compressor2 LP Fault Digital Input Sensing Delay. (Normal)
23
Reset mode for Compressor2 output, on Compressor2 LP
Fault Digital Input.
23-24
No of retrials of Compressor2 LP Fault Digital Input.
24
Activate/deactivate Compressor2 SPP Fault Digital Input.
24
Time delay to switch OFF the Light.
24
Enable/Disable Light Relay ON at Door Open.
25
Clear Compressor1 Run Hours.
25
Clear Compressor2 Run Hours.
25
Clear Fault Log
25
Display during Defrost.
26
Default (Normal) Display.
26
Display Delay.
26
Activate Alarm Relay.
26
Ht or Lt Alarm Power ON Delay.
27
Time Delay to activate Alarm Relay at Door Open.
27

SZ-CR2 3
Index
Parameter
Description
Page No.
Power Status
27
Set display at Power OFF Mode
27
Temperature unit selection in °C or °F.
28
Controller Resolution.
28
Change Password.
28
Keypad Lock.
28-29
To restore Default Settings of the Controller.
29
To end Programming.
29
Run Hour and Fault Logs
29
Compressor1 Run Hours.
29
Compressor2 Run Hours.
29
Balanced t4 Interchange duration.
29
Balanced defrost frequency for Compressor 1.
29-30
Balanced defrost frequency for Compressor 2.
30
View last 10 Fault Log.
30
End of Programming.
30
LED Indications
31-32
Fault Messages
32-33
Operating Messages
33
Password Function
34
High and Low Temperature Logging Function
35
Wiring Diagram
36
Caution for you Safety
37

SZ-CR2 4
Introduction:
The SZ-CR2 is a Two-Compressor Controller with separate Set Points for each
Compressor. They are specifically designed for Refrigeration applications wherein the
Compressor cuts off at Set Point and is restarted at a Temperature of Set Point plus
Differential. Amongst other features, an important one is that in case one Compressor
is not capable of handling the load, the second Compressor will activate and both
Compressors will cutout at the lowest Set Point.
Features:
•The operation is very user friendly and is easily understood with the examples in the
instructions below.
•Various parameters help set up the instrument functions for different applications.
•The SZ-CR2 can be used for applications with a measuring range from -45.0⁰C to
70.0⁰C.
•Defrost Application
•Cycling of Compressors so that there is no overload on one Compressor.

SZ-CR2 5
Technical Details
Housing : ABS Plastic
Dimensions : Front: 210 X 160 mm, Depth: 41.1 mm
Mounting : Wall Mount
Connections : Screw terminal blocks.
< 2.5sq mm terminal only.
Display : 3 X 33mm (1.3”) 7 segment display
Keys : 6 Tactile keys
Data storage : Non-volatile EEPROM memory.
Power input : 230Vac, +/- 10%, 50-60Hz Standard.
Relay output : Comp1 Relay 10A, 230V AC
Comp2 Relay 10A, 230V AC
Light Relay 10A, 230V AC
Alarm Relay 5A, 230V AC
Operating temp. : 0°C to 60°C (non-condensing)
Operating humidity : 20% to 85% (non-condensing)
Storage temp : -25.0°C to 60.0°C (non-condensing)
Measuring Range : -45.0°C to 70.0°C (when rS=0.1)
-45°C to 70°C (when rS=1)
-49°F to 158°F
Input : NTC Control Probe, SZ-T75
Digital Input : 230V operated for Compressor 1
HP (High Pressure Input),
LP (Low Pressure Input),
SPPR Input
230V operated for Compressor 2
HP (High Pressure Input),
LP (Low Pressure Input),
SPPR Input
Door Open Fault (Potential Free)
Resolution : +/- 1°C / 0.1°C / 1°F (Selectable)
Accuracy : +/- 1°C / 1°F

SZ-CR2 6
User Interface:
Keys
Description
Press for 500 milliseconds to Mute Alarm.
Press for 2 seconds to Manual Reset (HP1, LP1, HP2, LP2) Faults.
This key is used to exit from Program Mode / Set Mode / Run Hours
and Fault Log Mode.
Press for 1 seconds to view High/ Low Temperature Logging.
Used to increment parameter values in Set Mode and Program Mode
and scroll through parameters.
Press for 2 seconds to enter in Program Mode.
Used to decrementparameter values in Set Modeand Program Mode
and scroll through parameters.
Press for 2 seconds to enter in Set Mode.
To set and save parameters values in Set Mode and Program Mode.
In High/Low Temperature Logging Mode press for 2 seconds to reset
high / low Temperature logged values.
Press for 1 second to ON / OFF Light.
Press for 2 seconds to Power ON / OFF the Controller.
Press for 2 seconds to enter in Run Hours and Fault Log Mode.
Press for 2 seconds to Start / Stop Manual Defrost of Compressor1.
Press for 2 seconds to Start / Stop Manual Defrost of Compressor2.
Press and hold to see control probe Temperature if default display
(nd) is other than Pr1.
Note: If controller is in Set Mode/Program Mode/Run Hour and Fault Log Mode, in case
of inactivity of keys, it will return to parameter view mode in 30 seconds and will return
to Main screen in next 30 seconds.

SZ-CR2 7
How to Change the Parameter Value:
In Set Mode:
Press and hold key for 2 seconds and release. Display will show ‘SP1’. To go to other
parameters, use keys. After desired value, press the SET key & you will see
“- - -” which confirms that the parameter value has been stored in memory.
In Program Mode:
Press and hold key for 2 seconds and release. Display will show ‘CS’. To go to other
parameters, use keys. After desired value, press the SET key & you will see
“- - -” which confirms that the parameter value has been stored in memory.
Min: MINIMUM Max: MAXIMUM
Fac: FACTORY SETTING (DEFAULT)
Description of Parameters and Functions
Set Mode
Sr. No.
Parameter
Parameter Setting Method
Function: To set Cut OFF Set Point for Compressor1
Relay.
In this mode Compressor1 will be ‘ON’ if the Control
(Main) Probe Temperature reaches or goes above
‘‘Set Point + Differential” (SP1 + P4) and Compressor1
will be ‘OFF’ if Control (Main) Probe Temperature
reaches or goes below Set Point (SP1).
Example:
When Set Point1 is 0.0°C and Differential is 2.0°C. If
the Control (Main) Temperature reaches or goes
above 2.0°C (0.0°C + 2.0°C), Compressor will be ON.
Compressor will be OFF when Control (Main)
Temperature reaches or goes below 0.0°C.
Note:
This parameter is considered only if, CS not equal to
C2.
rS = 0.1
In °C
Min.
Max.
Fac.
(LS+1.0)°C
(HS-1.0)°C
0.0°C
rS = 1
In °C
Min.
Max.
Fac.
(LS+1)°C
(HS-1)°C
0°C
CF = F
Min.
Max.
Fac.
(LS+1)°F
(HS-1)°F
32°F

SZ-CR2 8
Function: To set Cut OFF Set Point for Compressor2
Relay.
In this mode Compressor2 will be ‘ON’ if the Control
(Main) Probe Temperature reaches or goes above
‘‘Set Point + Differential” (SP2 + P4) and Compressor2
will be ‘OFF’ if Control (Main) Probe Temperature
reaches or goes below Set Point (SP2).
Example:
When Set Point2 is 0.0°C and Differential is 2.0°C. If
the Control (Main) Temperature reaches or goes
above 2.0°C (0.0°C + 2.0°C), Compressor will be ON.
Compressor will be OFF when Control (Main)
Temperature reaches or goes below 0.0°C.
Note:
This parameter is considered only if CS is not equal to
C1.
rS = 0.1
In °C
Min.
Max.
Fac.
(LS+1.0)°C
(HS-1.0)°C
0.0°C
rS = 1
In °C
Min.
Max.
Fac.
(LS+1)°C
(HS-1)°C
0°C
CF = F
Min.
Max.
Fac.
(LS+1)°F
(HS-1)°F
32°F
Function: To end Programming in Set Mode.
To end programming
press "SET" key.
Once the key is pressed, the Controller goes into the
Normal Mode and displays the Temperature and all
settings are recorded.

SZ-CR2 9
Min: MINIMUM Max: MAXIMUM
Fac: FACTORY SETTING (DEFAULT)
Description of Parameters and Functions
Program Mode
Sr. No.
Parameter
Parameter Setting Method
Function: Compressor Selection.
This parameter is used to decide either both
Compressors are working or only single Compressor is
working.
Note: Compressor related parameters are applicable
for both Compressors depend on CS parameter setting.
If this parameter is set to,
(0)
= Select Compressor1.
(1)
= Select Compressor2.
(2)
= Select both Compressors.
(3)
= One working One Standby.
Min.
Max.
Fac.
Function: To Set High Temperature Alarm Set Point for
Control (Main) Probe.
Example: If this parameter is set to 50.0⁰C and the
Control (Main) Probe Temperature reaches or goes
above 50.0⁰C, display will show Ht (High Temp.)
indicating that the Temperature has reached or gone
above the value set in this parameter. Differential of
1.0⁰C is considered for clearing the fault.
Where, P3 = Low Temperature Alarm Set Point.
(Message on Display)
rS = 0.1
In °C
Min.
Max.
Fac.
(P3+1.0)°C
50.0°C
50.0°C
rS = 1
In °C
Min.
Max.
Fac.
(P3+1)°C
50°C
50°C
CF - F
Min.
Max.
Fac.
(P3+1)°F
122°F
122°F

SZ-CR2 10
Function: To Set Low Temperature Alarm Set Point for
Control (Main) Probe.
Example: If this parameter is set to -40.0⁰C and the
Control (Main) Probe Temperature reaches or goes
below -40.0⁰C, display will show Lt (Low Temp.)
indicating that the Temperature has reached or gone
below the value set in this parameter. Differential of
1.0⁰C is considered for clearing the fault.
Where, P2 = High Temperature Alarm Set Point.
(Message on Display)
rS = 0.1
In °C
Min.
Max.
Fac.
-40.0°C
(P2-1.0)°C
-40.0°C
rS = 1
In °C
Min.
Max.
Fac.
-40°C
(P2-1)°C
-40°C
CF = F
Min.
Max.
Fac.
-40°F
(P2-1)°F
-40°F
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).
rS = 0.1
In °C
Min.
Max.
Fac.
(SP+1.0)°C
50.0°C
50.0°C
rS = 1
In °C
Min.
Max.
Fac.
(SP+1)°C
50°C
50°C
CF = F
Min.
Max.
Fac.
(SP+1)°F
122°F
122°F

SZ-CR2 11
Function: To Set Low Temperature Alarm Set Point for
Control (Main) Probe.
Once set at a particular value, this will not allow the Set
Point to go below this value.
Example: Setting this parameter at -40.0°C will not
allow the Set Point to go below -39.0°C (LS+1.0).
rS = 0.1
In °C
Min.
Max.
Fac.
-40.0°C
(SP-1.0)°C
-40.0°C
rS = 1
In °C
Min.
Max.
Fac.
-40°C
(SP-1)°C
-40°C
CF = F
Min.
Max.
Fac.
-40°F
(SP-1)°F
-40°F
Function: To set Differential for Compressor.
Example:
If setpoint is set at 0.0°C and differential is set at 2.0°C,
then when the system reaches 0.0°C, the Compressor
relay will cutout and since the differential is 2.0°C, the
relay will cutin (restart) at 2.0°C (0.0°C + 2.0°C).
rS = 0.1
In °C
Min.
Max.
Fac.
1.0°C
20.0°C
2.0°C
rS = 1
In °C
Min.
Max.
Fac.
1°C
20°C
2°C
CF = F
Min.
Max.
Fac.
1°F
20°F
2°F

SZ-CR2 12
Function: To set Control (Main) Probe Calibration.
In time it may be possible that the display may be offset
by a degree or so.
To compensate for this error, user may need to add or
minus the degrees required to achieve the correct
Temperature.
Example:
The Temperature on the display is 28.0°C, whereas the
actual Temperature is 30.0°C. User will have to set the P5
Parameter to 2, which means that once out of the
Programming Mode, the Temperature on display will be
30.0°C (28.0°C + 2.0°C).
rS = 0.1
In °C
Min.
Max.
Fac.
-10.0°C
10.0°C
0.0°C
rS = 1
In °C
Min.
Max.
Fac.
-10°C
10°C
0°C
CF = F
Min.
Max.
Fac.
-10°F
10°F
0°F
Function: 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.
In Minutes
Min.
Max.
Fac.
0 Min
99 Min
3 Min
Function: Minimum ON Time for Compressor Relay.
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.
Example: If this parameter is set at 2 minutes, then the
Compressor Relay will remain ON for minimum 2 minutes,
though Set Point is achieved.
In Minutes
Min.
Max.
Fac.
0 Min
20 Min
0 Min

SZ-CR2 13
Function: Compressor Relay status in Sensor Fail
Condition.
When set to,
dd
(0)
= Compressor Relay will be
continuously OFF.
(1)
= Compressor Relay will be
continuously ON.
(2)
= Compressor relay will perform a
duty cycle of Cn Minutes OFF and
Cy Minutes ON.
Dd
Min.
Max.
Fac.
Function: Compressor relay OFF Time during Sensor Fail
Condition.
(This will be considered only when is ).
Example: If this parameter is set to 4 minutes, then
Compressor relay will be OFF for 4 minutes while
performing the duty cycle.
Min.
Max.
Fac.
1 Min
99 Min
4 Min
Function: Compressor relay ON Time during Sensor Fail
Condition.
(This will be considered only when is ).
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
Function: To select simultaneous or either defrosting of
two Compressors.
This parameter will decide whether defrosting of both
units can occur simultaneously or one at a time.
When set to,
(0)
= Defrost of one Compressor at a time.
(1)
= Simultaneous defrost of both
Compressors.
Note:
•This parameter is considered only if CS = btH and P71,
P72 not equal to 0.
Dd
Min.
Max.
Fac.

SZ-CR2 14
Function: To set type of computation for Defrost Time
Duration.
This parameter is used to decide the time calculation for
Defrost to happen for both Compressors.
When set to,
(0)
= Defrost Frequency time calculation will
start once the Controller is ON (Real
Time).
(1)
= Defrost Frequency time calculation will
be done only when Compressor is ON.
Note:
This parameter is considered only if P71, P72 not equal to
0.
Min.
Max.
Fac.
Function: Defrost duration for Compressor1.
This is the maximum amount of time allowed for a
defrost. If set to 0, there will be no defrost cycle.
Example: If this parameter is set to 15 minutes, and P81
Parameter is set at 6 hr. Then ‘6 hr’ after power is applied
to the controller, defrosting for 15 minutes will take
place. This cycle will repeat every ‘6 hr’.
Note:
This parameter is not considered if CS = C2.
Min.
Max.
Fac.
0 Min
99 Min
30 Min
Function: Defrost duration for Compressor2.
This is the maximum amount of time allowed for a
defrost. If set to 0, there will be no defrost cycle.
Example: If this parameter is set to 15 minutes, and P82
Parameter is set at 6 hr. Then ‘6 hr’ after power is applied
to the controller, defrosting for 15 minutes will take
place. This cycle will repeat every ‘6 hr’.
Note:
This parameter is not considered if CS = C1.
Min.
Max.
Fac.
0 Min
99 Min
30 Min
Function: This parameter is used to set the frequency for
Defrost Cycle for Compressor1.
This is the amount of time between two Defrost Cycles.
Example: As explained for P71 Parameter.
Note:
•This parameter is not considered if CS = C2 and
P71 = 0.
Min.
Max.
Fac.
1 Hr
31 Hrs
6 Hrs

SZ-CR2 15
Function: This parameter is used to set the frequency for
Defrost Cycle for Compressor2.
This is the amount of time between two Defrost Cycles.
Example: As explained for P72 Parameter.
Note:
•This parameter is not considered if CS = C1.
and P72 = 0.
Min.
Max.
Fac.
1 Hr
31 Hrs
6 Hrs
Function: Power ON Defrost Delay for Compressor1.
This parameter is used to set Defrost Delay at Power ON.
This delay starts once the controller is Powered ON. Once
this time delay gets over and if conditions are not suitable
for Defrost, means, Control Probe Sensor is Faulty,
defrost will not take place, but the time calculation does
not get cleared, it will clear only when Defrost takes place.
And Defrost take place once the conditions become
suitable for Defrost.
Note:
•This parameter is not considered only if CS = C2.
and P71 = 0.
Min.
Max.
Fac.
0 Min
99 Min
30 Min
Function: Power ON Defrost Delay for Compressor2.
P92 parameter is used to set Defrost Delay at Power ON.
This delay starts once the controller is Powered ON. Once
this time delay gets over and if conditions are not suitable
for Defrost, means, Control Probe Sensor is Faulty,
defrost will not take place, but the time calculation does
not get cleared, it will clear only when Defrost takes place.
And Defrost take place once the conditions become
suitable for Defrost.
Note:
•This parameter is not considered if CS = C1.
and P72 = 0.
Min.
Max.
Fac.
0 Min
99 Min
30 Min

SZ-CR2 16
Function: Activate/Deactivate Door Open Digital Input.
When set to,
(0)
= Door Open Digital Input Fault Sensing is
disabled.
(1)
= Controller will sense Door Open Digital
Input Fault when switch is open.
(2)
= Controller will sense Door Open Digital
Input Fault when switch is closed.
dd
Min.
Max.
Fac.
Function: To set Fault Sensing Delay for Door Open Digital
Input.
Example: If do1 = 15 seconds and if Door Open Fault is
present for 15 seconds, then Door Open Digital Input
Fault is detected.
Note: This parameter is considered only if do0 is enabled.
Min.
Max.
Fac.
0 Sec
600 Sec
15 Sec
Function: To set output status at Door open fault.
When set to,
(0)
= No action will be performed, only fault
indication led will be blinking at fault.
(1)
= No action will be performed, only fault
indication led will be blinking, Alarm and
its icon will be ON at fault.
(2)
= Both Compressors will be OFF, fault
indication led will be ON, Alarm and its
icon will be ON at fault.
Note: This parameter is considered only if do0 is enabled.
dd
Min.
Max.
Fac.
Function: Delay time for Temperature updating Door
Open Digital Input Fault.
For Door Open Digital Input, if this parameter is set to 5
seconds, once the Door Open Fault has come,
Temperature will update after 5 seconds and not
immediately.
Note: This parameter is considered only if do0 is enabled.
Min.
Max.
Fac.
0 Sec
180 Sec
0 Sec

SZ-CR2 17
Function: Time duration to start Compressor with High
Set Point incase Low Set Point Compressor is not able to
achieve the load.
Example: Set Point for Compressor1 is 23°C and Set Point
for Compressor2 is 25°C and if t2 parameter is set to 10
minutes. Once the controller is powered ON,
Temperature is 27°C.Both Compressors gets ON and
Temperature decreases and Compressor2 cuts out at
25°C then if Compressor1 is not able to achieve 23°C for a
period of 10 minutes, Compressor2 will come ‘ON’ and
‘Compressor 2 ‘Led start flashing, both Compressors will
be ‘OFF’ at the Low Set Point means 23°C.
Note:
This parameter is considered if CS = .
Min.
Max.
Fac.
0 Min
30 Min
0 Min
Function: Minimum On/Off Time between Two
Compressors.
This parameter is provided to set the time delays between
consecutive ON/OFF of both the Compressors if it is
happening at the same time due to Temperature
conditions.
Note:
This parameter is considered if CS = .
Min.
Max.
Fac.
5 Sec
60 Sec
5 Sec
Function: This parameter is used to set the Time Interval
at which the Set Point for Compressors will get
interchanged.
This parameter is used to avoid overloading of any one
compressor working at a stretch over a period of time.
Example: If this parameter is set at 6 hours, the setpoint
of both compressors will interchange after 6 Hours. The
interchange will occur every 6 Hours.
Time calculation will start at power on.
This helps to avoid overworking of any one compressor
for long hours and increases compressor life. If for any
reason the Set Points have been changed, the time
calculation will start from the last change in any of these
parameters.
Note:
•Setting with 'r' is interchange on run hours and
without 'r' is interchange without run hours. If set to
Min.
Max.
Fac.
0 Hr
24 Hrs
0 Hr

SZ-CR2 18
0, changeover will happen at the fix interval of 12
hours as per t4 = 0 setting.
•This parameter is not considered if CS is set to C1 or
C2.
Function: Set Point Interchange on Fault.
When set to,
(0)
= Disable Set Point Interchange on Fault.
(1)
= Enable Set Point Interchange on Fault.
Note:
This parameter is not considered if CS is set to C1 or C2.
Min.
Max.
Fac.
Function: To activate/deactivate HP Fault Digital Input for
Compressor1.
When set to,
(0)
= Digital input is disabled.
(1)
= Digital input is open connection (0V)
will be a fault.
(2)
= Digital input is close connection
(230V) will be a fault.
Note:
This parameter is not considered if CS = C2.
Min.
Max.
Fac.
Function: To set Compressor1 HP Fault sensing delay.
Example: If H11 isset to 5 seconds, once the Compressor1
is ON, if the Compressor1 HP Fault Digital Input is
unhealthy for continuous 5 seconds, Compressor will be
tripped on HP Fault.
Note:
•This parameter is considered only if H01 is enabled
CS is not equal to C2.
Min.
Max.
Fac.
0 Sec
99 Sec
5 Sec
Function: To set reset mode for Compressor1 output, on
Compressor1 HP Fault Digital Input for Compressor1.
If this parameter is set to,
(0)
= Auto Reset Option for HP Fault.
(1)
= Manual Reset Option for HP Fault after
H41 retrials in 1 hour.
Min.
Max.
Fac.

SZ-CR2 19
Example:
If user has set the parameter to following:
= HP Fault will get cleared automatically
once the Input becomes healthy.
= If this parameter is set to mAn and H41
parameter is set to 5 then if the
Compressor gets tripped on HP fault for 5
times in 1 hour, controller will go into
Manual Reset and user has to reset the
fault through RST key by pressing for 2
Seconds. Fault will get cleared only if the
Input has become Healthy.
Note:
•This parameter is considered only if H01 is enabled
and CS is not equal to C2.
Function: No. of retrials of Compressor1 HP Fault Digital
Input when Manual Reset is selected.
Example: If this parameter is set to 5, Compressor will go
into Manual Reset if the HP Fault occurs 5 times in an
Hour.
Note:
•The Fault counts will get cleared in every hour.
•This parameter is considered only if H01 is enabled
and CS is not equal to C2.
Min.
Max.
Fac.
1
10
5
Function: To activate/deactivate Compressor1 LP Fault
Digital Input.
If this parameter is set to,
(0)
= Digital input is disabled.
(1)
= Digital input is open connection (0V)
will be a fault.
(2)
= Digital input is close connection (230V)
will be a fault.
Note:
This parameter is not considered if CS = C2.
Min.
Max.
Fac.
Function: Compressor1 LP Fault Digital Input Sensing
Delay. (Surge)
Example: If LS1 is set to 5 seconds, once the Compressor1
is ON, controller will ignore the LP Fault for 5 Seconds.
Note:
•This parameter is considered only if L01 is enabled
and CS is not equal to C2.
Min.
Max.
Fac.
0 Sec
99 Sec
5 Sec