26
C6.1.6/0117-1017/E
If temperature
≥
G02
+
G03
, switch on liquid line solenoid.
If temperature
≤
G02
, switch off liquid line solenoid and the compressor will continue to operate until
most of the refrigerant on the low side boils off and is pumped through the compressor into the
condenser and receiver. As the suction pressure falls below the low-pressure cut-out value (
C02
),
the compressor will cycle off.
The temperature value depends both on parameter
G02
and parameter
G11
(maximum pump-down
time). It means that when the liquid line solenoid is off, the compressor will stop because of suction
pressure decrease within
G11
time. If the running time of the compressor exceeds
G11
value, the
compressor will be forced to shut down and the controller will generate a pump-down alarm.
2.15 Reset to factory settings
– Emerson "Hot Key"
2.15.1 How to save factory settings or user settings
There is no way to reset the XCM25D controller to factory settings other than with additional
equipment. Emerson recommends to use the Emerson "Hot Key" (not part of the standard delivery)
to save the factory settings at initial power up. The same hot key can also be used to save user
settings.
By means of a special programming software (Emerson Wizmate) and corresponding hardware
(Emerson Prog-Tool), the user can:
▪
preprogram hot keys
▪
copy hot keys
▪
change parameter levels
▪
compare parameter lists
For further information please visit our website at
Application Engineering representative.
2.15.2 Applicable hot key for ZX units with XCM25D controller
The Emerson "Hot Key"
DK00000300
can be used for
uploading and downloading of parameter lists. Copeland ident
number 3226456.
Figure 15: Emerson "Hot Key"
2.15.3 Location of the "Hot Key" plug connection on the XCM25D controller
The "Hot Key" plug connection is located on the upper left corner of the XCM25D.
Figure 16: Location of "Hot Key" plug connection
2.15.4 How to program a "Hot Key" from the controller (upload)
▪
Program one controller with the front keypad.
▪
When the controller is on, insert the "Hot Key" and press the
UP
key; the
"uPL"
message
appears followed a by a flashing "
End
" label.
▪
Press the
SET
key and the "
End
" label will stop flashing.
▪
Turn the controller off, remove the "Hot Key" then turn it on again.
