Service Test; Configuring And Operating Dual Chiller; Control - Carrier ComfortLink 6 Series Controls, Start-Up, Operation, Service, And Troubleshooting

Fig. 10 — Navigator Module
password will be disabled requiring that it be entered again
before changes can be made to password protected items.
The Service Test function should be used to verify proper
protected items. Press the
ESCAPE
text mode.
NOTE: When the LANG variable is changed, all appropriate
display expansions will immediately change to the new
language. No power-off or control reset is required when
reconfiguring languages.
When a specific item is located, the item name appears on
the left of the display, the value will appear near the middle of
the display and the units (if any) will appear on the far right of
the display. Press the key at a changeable item and the
ENTER
value will begin to flash. Items in the Configuration and Ser-
vice Test modes are password protected. The password can be
changed utilizing the Navigator or through CCN devices such
as ComfortWORKS®, ComfortVIEW™ and Service Tool.
The words 'Enter Password' will be displayed when required,
with the default password also being displayed. Use the
and arrow keys to enter the 4 digits of the password. The
default password is 1111. Use the following procedure to
change the password:
1. Enter the correct password under PASS, Service
Password (Configuration Mode, Sub-mode DISP).
2. Change PAS.E Password Enable (Configuration Mode,
Sub-mode DISP) to DSBL.
3. Return to the PASS, Service Password, and change the
password to the desired value. For example, 2222. Once
changed, the screen will show the new value, 2222.
4. Return to the PAS.E Password Enable, and change the
value to ENBL.
The password has been changed. If the password is
required, the machine will show the default 1111 as the
password. Use the up or down arrow keys to change the value
to the correct password.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
so that the item value flashes. Use the arrow keys to
ENTER
change the value or state of a item and press the
accept it. Press the key to return to the next higher level
ESCAPE
of structure. Repeat the process as required for other items. See
Tables 12-25 for further details.
key to exit out of the expanded
ENTER
key to
ENTER
Two items, OAT Outside Air Temperature (Temperature
Mode, Sub-mode UNIT) and SPT Space Temperature
(Temperature Mode, Sub-mode UNIT) can be forced to a value
at the Navigator. If one of these two points has been forced, a
flashing "f" will appear next to the value indicating a forced
value. To remove the force, select the item and press the
key so that the value is flashing. Press the up and down arrow
keys simultaneously and the force will be removed.
Service Test (See Table 13) —
control circuit power must be on. The Service Test function
should be used to verify proper operation of the compressors,
loaders, pumps, solenoids, fans, heaters, etc. To access the
Service Test mode, the Enable/Off/Remote Contact switch
must be in the Off position. Use the display keys to enter the
Service Test mode and display 'TEST OFF'. Press the
key and 'Off' will flash (Enter the password if required). Use
either arrow key to change the 'Off' to 'On' and press
Switch the Enable/Off/Remote Contact switch to the Enable
position. Use the arrow keys to select either sub-mode OUTS
or COMP. Test the expansion valves, oil pumps, fans, cooler
heaters, cooler/condenser pump relays, remote alarm relay,
head pressure control, and compressor oil and motor cooling
solenoids under the OUTS sub-mode. Note that condenser-fan
motors are NOT started during VH.PA or VH.PB test on
30GXN,R units with Motormaster® control. Measure 4 to
20 mA dc output using meter in series with violet or pink wire
to controller. Refer to the Field Wiring section. These discrete
outputs are then turned off if there is no keypad activity for
10 minutes. Test the compressors, loaders, minimum load
valves and oil heaters under the COMP sub-mode. Compressor
loaders, minimum load valve and oil heaters can be tested with
compressors on or off. All compressor outputs can be turned
on, but the control will limit the rate by staging one compressor
per minute. The relays under the COMP sub-mode will stay on
for 10 minutes if there is no keypad activity. Compressors will
stay on until they are turned off by the operator. The Service
Test mode will remain enabled as long as there is more than
one compressor turned on. All safeties are monitored during
this test and will turn a compressor, circuit or motor off if nec-
essary. Any other mode or sub-mode can be viewed or changed
during the TEST mode. The STAT item (Run Status mode un-
der sub-mode VIEW) will display 'SERVICE TEST' as long
as the Service mode is enabled. The TEST sub-mode value
must be changed back to OFF before the chiller can be
switched to Enable or Remote contact for normal operation.
Configuring and Operating Dual Chiller Con-
trol (See Table 24A and 24B) —
routine is available for the control of two units supplying
chilled fluid on a common loop. This control is designed for ei-
ther series or parallel fluid flow (PARA, Configuration mode
under sub-mode RSET) arrangements. One chiller must be
configured as the master chiller, the other as the slave chiller.
For series fluid flow, the master chiller is installed so that it re-
ceives entering fluid from the slave chiller and its leaving fluid
supplies the load. See Fig. 11. For parallel flow applications, an
additional leaving water temperature thermistor (Dual Chiller
LWT) must be installed as shown in Fig. 12 and 13 and con-
nected to the master chiller. Refer to Thermistors section for
sensor wiring.
19
ENTER
Both main power and
ENTER
.
ENTER
The dual chiller