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

MAINTENANCE

Recommended Maintenance Schedule

The 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 indus-
trial applications.
Every month:
• Check condenser coils for debris; clean as necessary with
Carrier approved coil cleaner.
• Check moisture indicating sight glass for possible refriger-
ant loss and presence of moisture.
• Record water pressure differential.
• Record system superheat.
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 compressor and fan drives for any de-
bris. If present, clean it by blowing air from top to bottom.
• Check Compressor VFD drain tubes if present (30XV350-
500).
Every 12 months:
• Check refrigerant charge.
• Check all electrical connections; tighten as necessary.
• Inspect all contactors and relays; replace as necessary.
• Change oil filters year 1, then as needed.
• 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.
Every 3-5 years:
• Inspect and clean evaporator tubes.
• Inspect relief valves.

TROUBLESHOOTING

Alarms and Alerts

The integral control system constantly monitors the unit and
generates warnings when abnormal or fault conditions occur.
Alarms may cause either a circuit (Alert) or the whole machine
(Alarm) to shut down. Alarms and Alerts are assigned codes as
described in Table 167.
To view information about current and past alarms or to reset
alarms, touch the Alarm bell button
of the Carrier Controller 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, touch the Alarm bell button
in the top right corner of the Carrier Controller display, and
then select Current Alarms.
current alarms with the time and date as well as a one line de-
scription of each alarm. See Table 167 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 intervention if the condition that
caused the alarm corrects itself. Manual reset alarms require
the service technician to check for the alarm cause and reset the
alarm.
To reset any active alarms, touch the Alarm button
touch the Reset Alarms icon
YES Radio Button and select SET in the pop-up window.
When resetting the alarm manually, the reset can be performed
through the Carrier Controller 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 displayed in the
Current Alarms menu. Each alarm is also described by a numer-
ic code. See Tables 167 and 168 for lists of alarms by code. See
Table 169 for Master/Slave alarm codes.
In the event of a power supply interrupt, the unit restarts auto-
matically 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 history. Information regarding re-
solved alarms is stored in the Alarm history menu, which is di-
vided into 50 recent alarms and 50 recent major alarms. General
alarms indicate pumps failure, transducers faults, network con-
nection problems, etc. Major alarms indicate process failure.
To access the Alarm history menu, touch 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 re-
placed on a first-in first-out basis.
208
in the top right corner
This screen displays up to 10
and then
. For Alarm Reset select the