Maintenance; Recommended Maintenance Schedule; Troubleshooting; Alarms And Alerts - Carrier AquaForce 30XV140 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

MAINTENANCE

Recommended Maintenance Schedule —
following are only recommended guidelines. Jobsite con-
ditions may dictate that maintenance tasks be performed
more often than recommended.
Routine:
For machines with e-coat condenser coils:
• Check condenser coils for debris; clean as necessary with
Carrier approved coil cleaner.
• Periodic clean water rinse, especially in coastal and
industrial applications.
Every month:
• Check condenser coils for debris; clean as necessary with
Carrier approved coil cleaner.
• Check moisture indicating sight glass for possible refrig-
erant loss and presence of moisture.
Every 3 months:
• Check all refrigerant joints and valves for refrigerant
leaks; repair as necessary.
• Check chilled water flow switch operation.
• Check all condenser fans for proper operation.
• Check oil filter pressure drop.
• Check oil separator heater operation.
• Check air filters located on the front panel of the compres-
sor VFD drives by opening the plastic grilles; replace
clogged filters. Filters may be cleaned with mild detergent
soap and water.
• Check the back of all the compressor and fan drives for
any debris. If present clean it off by blowing air from top
to bottom.
Every 12 months:
• Check refrigerant charge.
• Check all electrical connections; tighten as necessary.
• Inspect all contactors and relays; replace as necessary.
• Check accuracy of thermistors; replace if greater than
±2° F (1.2° C) variance from calibrated thermometer.
• Check accuracy of transducers; replace if greater than
±5 psig (34.47 kPa) variance.
• Check to be sure that the proper concentration of anti-
freeze is present in the chilled water loop, if applicable.
• Verify that the chilled water loop is properly treated.
• Check refrigerant filter driers for excessive pressure
drop; replace as necessary.
• Check chilled water strainers, clean as necessary.
• Check evaporator heater operation.
• Check oil heater operation.
• Check condition of condenser fan blades and that they
are securely fastened to the motor shaft.
• Perform Service Test to confirm operation of all components.
• Check for excessive evaporator approach (Leaving Chilled
Water Temperature – Saturated Suction Temperature) which
may indicate fouling. Clean evaporator vessel if necessary.
• Obtain oil analysis; change as necessary.

TROUBLESHOOTING

Alarms and Alerts —
stantly monitors the unit and generates warnings when abnor-
The integral control system con-
mal or fault conditions occur. Alarms may cause either a circuit
(Alert) or the whole machine (Alarm) to shut down. Alarms
The
and Alerts are assigned codes as described in Table 72.
To view information about current and past alarms or to re-
set alarms, press the Alarm bell button
ner of the Touch Pilot™ display. A solid gray icon is present
during normal operation. The bell icon is red if there is an
alarm or alert. A blinking red bell icon indicates that there is an
alarm, but the unit is still running. A solid red highlighted bell
icon indicates that the unit is shut down due to a detected fault.
CURRENT ALARMS — To access the current alarms view,
press the Alarm bell button
Touch Pilot display, and then select Current Alarms.
screen displays up to 10 current alarms with the time and date
as well as a one line description of each alarm. See Table 72 for
a list of possible alarms sorted alphabetically by description.
RESETTING ALARMS — The alarms can be reset without
stopping the machine. The controller generates two types of
alarms. Automatic reset alarms will reset without any interven-
tion if the condition that caused the alarm corrects itself. Manu-
al reset alarms require the service technician to check for the
alarm cause and reset the alarm.
To reset any active alarms, press the Alarm button
then press the Reset Alarms icon
1 select Yes and select the Force lightning bolt button
When resetting the alarm manually, the reset can be performed
through the Touch Pilot display or remotely through the web
interface (Reset Alarms menu).
Only logged-in users can access the Reset Alarms menu.
The menu displays up to five alarm codes which are currently
active on the unit, corresponding to the first five items dis-
played in the Current Alarms menu. Each alarm is also de-
scribed by a numeric code. See Tables 73 and 74 for lists of
alarms by code.
In the event of a power supply interrupt, the unit restarts
automatically without the need for an external command.
However, any faults active when the supply is interrupted
are saved and may in certain cases prevent a circuit or a unit
from restarting.
Before resetting any alarm, first determine the cause of the
alarm and correct it. Do not reset the chiller at random without
first investigating and correcting the cause(s) of the failure.
ALARM HISTORY — Once the cause of the alarm has been
identified and corrected, it will be displayed in the alarm histo-
ry. Information regarding resolved alarms is stored in the
Alarm history menu, which is divided into 50 recent alarms
and 50 recent major alarms. General alarms indicate pumps
failure, transducers faults, network connection problems, etc.
Major alarms indicate process failure.
To access the Alarm history menu, press the Alarm button
and select Alarm Historic or Major Alarm Historic. The 50
most recent alarms of each type are stored in memory, and are
replaced on a first-in first-out basis.
100
in the top right cor-
in the top right corner of the
This
and
. For Alarm Reset on line
.