8
7
Description of parameters and functions.
Sr.No.
Parameter
Parameter setting
method.
Fact.
Set
Range
Min Max
To change
P7
parameter,
press the
set key
Use UP/DOWN key to set
desired value.
Example : If this parameter set
at 3 minutes, the relay will cutoff
at set temperature, but will not
restart for a minimum of 3
minutes, even if the differential
is a chieved earlier. This
parameter is good to protect the
life of the compressor or even in
applications where the probe is
placed at places where there
are sudden and short changes
in temperature like above a cold
room door.
This parameter is used to
protect the compressor from
restarting in a short period of
time.
Use UP/DOWN key to set
desired value.
Example : if this parameter is
set to 2 minutes, then for 2
minutes the Fan, Compressor,
Heater will stay off so that the
defrost water can drip and drain
out.
This is time for which the Fan,
Co m pre s so r, C on d e ns e r,
Heater will stay OFF so that the
defrost water can drip and drain
out.
P7
Parameter
Function: To set drip time for
defrost water to drain out.
0 Min 20 Min 1 Min
7
P8
Parameter
Function: To set comp. Relay
status on room probe failure.
0 2 1
8
To change
P8
parameter,
press the
set key
Use UP/DOWN keys to set
desired value.
0 = Compressor relay ON.
1 = Compressor relay
'on' minutes and 'oF'
minutes(see next two
parameter). (see Sr. 9A
and 9B)
performs a duty cycle of
2 = Compressor relay OFF.
To change
P6
parameter,
press the
set key
Description of parameters and functions.
Sr.No.
Parameter
Parameter setting
method.
Fact.
Set
Range
Min Max
On time
Parameter
If P8=1, Cyclic ON time. 2 Min 60 Min 10 min
8A
Use UP/DOWN key to set
desired value. This is cyclic
ON time. This parameter will
be active only when P8 = 1.
To change
on
parameter,
press the
set key
Off time
Parameter
If P8=1, Cyclic OFF time. 3 Min 20 Min 4 Min
8B
Use UP/DOWN key to set
desired value. This is cyclic
OFF time. This parameter will
be active only when P8 = 1.
To change
oF
parameter,
press the
set key.
do
Parameter
Function : To set sensing
logic for HP/LP/OSS.
0 1 1
9
Use UP/DOWN keys to set
desired value.
To change
do
parameter,
press the
set key
L1
Parameter
Function : Evap. Fan stop coil
temp. 0C
-50.0 50.0
0C
0
2.0 C
10
56
Fact.
Set
Range
Max
10.0°
C
0.0°C
30 Min 3 Min
Description of parameters and functions.
Sr.No.
Parameter
Parameter setting
method.
Min
To change
P5
parameter,
press the
set key
In time it may be possible that
the temp. on 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 correct temperature.
Use UP/DOWN key to set
desired value.
Example : The temperature
on the display is 28.0°C,
w h e r e a s t h e a c t u a l
temperature is 30.0°C. You will
need to set this parameter to
2.0°C, which means that once
out of programming mode, the
t e m p e r a t u r e w i l l s h o w
30.0°C(28.0°C + 2.0°C).
P5
Parameter
Function : To set room probe
offset calibration.
-10.0
°C
5
P6
Parameter
Function: To set time delay
between comp. relay restart
time.
0 Min
6
Example : If the set point is set
at 10.0 °C and differential is set
at 2.0°C, then when the
system reaches 10.0 °C, the
comp. Relay will cutout. Since
the differential is 2°C, the
comp. Relay will cutin at
12.0 °C (10.0°C + 2.0°C).
Differential between cutout
and cutin temperature can be
set between 0.5 °C to 20.0 °C.
To change
P4
parameter,
press the
set key
Description of parameters and functions.
Sr.No.
Parameter
Parameter setting
method.
Fact.
Set
Range
Min Max
To change
L3
parameter,
press the
set key
Use UP/DOWN keys to set
desired value.
1 = Evap. fan will be stay ON
when compressor will be
compressor is OFF.
0 = Evap. fan OFF when
off.
L3
Parameter Function : Evap. Fan
operation when compressor
is off.
0 1 1
12
Use UP/DOWN keys to set
desired value.
This setting is used to limit
maximum temperature
beyond which the evap. fan
will cutoff.
To change
L1
parameter,
press the
set key
L2
Parameter
Function : To set time delay
between evap. fan relay
restart time.
0 Min 99 Min 1 Min
11
To change
L2
parameter,
press the
set key
Use UP/DOWN keys to set
desired value.
Example : If this is set 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 if L4 is achieved
earlier.
0VDC present.
0 = P/LP/OSS fault with
12VDC present.
1 = HP/LP/OSS fault with
