Conair MPA - Manual (Page 26)

microKool Portable Chillers UGH004/0999
The PC-1 and PC-2 controls provide the ability to protect sys-
tem parameters from unauthorized changes during normal
operating mode. When system passcode protection is enabled,
the following parameters cannot be changed unless you enter
the correct passcode:
● The Process Setpoint
● High Deviation Alarm Setpoint
● Low Deviation Alarm Setpoint
● Baud Rate selection for serial communications
● Address selection for serial communications
When the unit is turned on for the first time, passcode protec-
tion is disabled. To enable passcode protection:
Disconnect and lock out main power to the unit.
Open the electrical enclosure.
Set dip switch 3 to ON
and switches 5 and 6
to OFF.
Close the electrical enclosure and restore
power to the unit.
Press any
button when
the control dis-
plays “Pas rSt”
(Passcode Reset) .
The control will
display the last
passcode used.
Select a new passcode using the ▲ ▲ and ▼ ▼
setpoint adjustment buttons.
Stop pressing the setpoint buttons when the passcode you
want appears in the setpoint display window. Selecting
“OFF” as the passcode will disable the passcode feature.
E
NABLING AND
D
ISABLING
P
ASSCODE
P
ROTECTION
3-10
I NSTALLATION
WARNING: Electric shock hazard
This equipment is powered by high voltage. Always
disconnect and lock out the main power source
before opening the unit or the electrical enclosure to
modify factory settings. Failure to disconnect and
lock out the main power source can result in severe
personal injury.
1
2
3
4
1 2 3 4 5 6 7 8
5
6