12
This mode is used to set the time
delay between the switching off
of both compressors so that they
do not switch off simultaneously.
Example :
If this mode is set to
3 seconds the second compressor
will switch off after a minimum
of 3 seconds from the first
compressor switching off.
If set to 0, this feature will not
activate.
Function : To set minimum off
time between two compressor.
To change
t3 parameter,
press the
SET key.
t3
Parameter
Max Fac.
5 Sec
15 Sec
Min
0 Sec
13
To change
t4 parameter,
press the
SET key.
This function 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
2 hours, the setpoint, differential &
time delay of both compressors will
interchange after 2 hours The
interchange will occur every 2 hours.
Time calculation will start at power on.
This helps by not overworking any
one compressor for long hours and
increases compressor life. If for any
reason the setpoints have been
changed, the time calculation will
start from the last change in these
parameters.
Function : To avoid overloading of
either compressor.
t4
Parameter
Max Fac.
0 Hr
12 Hrs
Min
0 Hr
15
When display
shows E1 press
SET key.
Use UP/DOWN keys to set
desired value.
0 = Both the relays will
stay on with initial start-up
delay of 2 minutes.
1 = Both compressor
performs a duty cycle of
10 minutes ON and
4 minutes OFF.
2 = Both relay will stay OFF.
Function : Relay status on probe
failure.
E1
Parameter
Max Fac.
1
2
Min
0
14
LP
Parameter
Function: To Lock keypad.
To change
LP parameter,
press the
SET key.
Use UP/DOWN keys to set desired
value. This parameter can lock the
keypad so that tampering is not
possible by by-standards.
0 = Keypad unlocked.
1 = Keypad locked.
When locked all parameters can
only be viewed, but not modified.
Max Fac.
0
1
Min
0
16
rS
Parameter
Function: To set controller Resolution.
To change
rS parameter
press the
SET key.
Use UP/DOWN keys to set desired
value.
1 = Controller Resolution will
O
set 0.1 C.
0 = Controller Resolution will
O
set 1 C.
Max Fac.
0
1
Min
0
11
If set to 0, this feature will not activate.
Example :
If setpoint 1 is 23 and
setpoint 2 is 25 and if t2 para is set to 7
minutes, if the second comp. cuts out
at 25, if comp. 1 is not able to achieve
23 for a period of 7 minutes, then after
7 minutes, second compressor will
also come on and both compressors
will cutout at the lower setpoint.
This function is used to switch on
the second compressor incase
the heat load cannot be met with
one compressor functioning.
If t2 is set less than P6, then P6 para
will override t2 parameter.
Function : To start second comp. incase
comp 1 cannot achieve the lower set
point.
To change
t2 parameter,
press the
SET key.
t2
Parameter
Fac.
0 Min
Max
30 Min
Min
0 Min
NOTE : T2 parameter is activated
only when P1=0 (cooling).
