Carrier 16DF013-050 - Manual (Page 35)

CHECK HERMETIC PUMP STARTERS
AND SHUTDOWN CYCLE
1. Make sure the solution and refrigerant pump starters are
energized (relay pulled in to close the starter contacts).
2. Depress the Stop button momentarily. Verify that the re-
frigerant pump starter deenergizes immediately, and the
dilution valve is energized.
3. Verify that the solution pump starter and dilution valve
deenergize after about 15 minutes, and the status indica-
tor shows ‘‘000’’. The remaining time of the dilution pe-
riod will be displayed in minutes on the status indicator
when the Stop button is depressed during the shutdown
period.
CHECK HERMETIC PUMP MOTOR OVERLOADS
1. Depress the Start button to restart the control circuit.
2. After the start cycle has completed, push the trip bar on
the solution pump starter overload. Both pump starters
will deenergize, the alarm buzzer will sound, and an ‘‘E04’’
fault code will be displayed.
3. Press the Stop button to silence the alarm and the starter
reset button to reset the overload. Press the Start button
after the shutdown cycle has completed to restart the con-
trol circuit.
4. After the start cycle has completed, push the trip bar on
the refrigerant pump starter overload. The refrigerant pump
starter will deenergize, the alarm buzzer will sound, and
an ‘‘E04’’ fault code will be displayed. The machine will
proceed through a normal dilution shutdown cycle.
5. Press the Stop button to silence the alarm and the starter
reset button to reset the overload.
CHECK BURNER INTERLOCKS
1. Depress the Start button to restart the control circuit.
2. Place burner operation control switch to ON. The burner
blower should start and the ignition sequence begin. Be-
cause the fuel valves are closed, at the end of the ignition
trial period the burner alarm light will illuminate, the ma-
chine alarm buzzer will sound, and an ‘‘E08’’ fault code
will be displayed.
3. Depress the reset switch on the combustion controller in
the burner control panel and the machine Stop button to
silence the alarm.
4. Place burner operation control switch to OFF to prevent
a restart.
CHECK LOW CHILLED WATER
TEMPERATURE CUTOUT
1. Place low chilled water temperature cutout sensor bulb
with a thermometer in a cool water bath not colder than
45 F (7 C).
2. Depress Start button to start control circuit.
3. Slowly stir in ice to chill the water, and note the tem-
perature. The low chilled water temperature cutout is fac-
tory set to shut the machine down at about 39 F
(4 C), and will display a fault code of ‘‘E01’’.
4. Depress the Stop button to silence the alarm, and return
the sensor bulb to its well in the chilled water outlet pipe.
The switch will reset automatically when the sensor warms
13° F (7° C).
CHECK HEATING CYCLE START AND STOP
1. While the control operation is off, place the TS-3 select
cool/heat switch (located on the inside of the control panel
door) in the HEAT position.
2. Depress the Start button momentarily to begin the timed
starting and system checks sequence. As it progresses
through the sequential component start cycle, the control
panel status indicator will display ‘‘APO’’, then ‘‘HPO’’.
The refrigerant pump, condensing water pump, and tower
fan are not used for heating operation.
3. Depress the Stop button momentarily. Verify that the so-
lution pump starter deenergizes after a period of approxi-
mately 15 minutes and the status indicator shows ‘‘000’’.
CHECK WATER FLOW SWITCHES
1. Place the dc power supply switch in the OFF position to
deenergize the control circuit.
2. Remove the test jumper wire from the chilled/hot water
flow switch terminals.
3. Place the dc power supply switch in the ON position to
energize the control circuit. Depress the Start button mo-
mentarily to start the control start sequence. Within about
20 seconds, the alarm buzzer will sound and the ‘‘E02’’
fault code will be displayed.
4. Depress the Stop button momentarily to silence the alarm.
5. Place the dc power supply switch in the OFF position to
deenergize the control circuit.
6. Reconnect the temporary jumper wire on the flow switch
terminals.
7. Repeat Steps 2 through 6 with the cooling water flow switch,
if used, for an ‘‘E03’’ fault code after about 40 seconds.
CHECK HIGH-STAGE GENERATOR
LOW SOLUTION LEVEL SWITCH
1. Remove the test jumper wire from the low solution level
electrode on the high-stage generator.
2. Place the dc power supply switch in the ON position to
energize the control circuit. Depress the Start button mo-
mentarily to start the control start sequence. After about
one minute, place the burner operation switch in RUN.
The burner should not start.
3. Depress the Stop button momentarily to stop the control
sequence.
4. Place the dc power supply switch in the OFF position to
deenergize the control circuit.
5. Reconnect the temporary jumper wire on the electrode
terminals.
CHECK HIGH COMBUSTION TEMPERATURE
SWITCHES
1. Place the dc power supply switch in the ON position to
energize the control circuit.
2. Depress the Start button momentarily to start the control
start sequence. After about one minute, turn the set point
adjustment knob on the exhaust gas high-temperature switch
down to a setting below ambient temperature. The alarm
buzzer will sound and the ‘‘E06’’ fault code will be
displayed.
3. Depress the Stop button momentarily to silence the alarm.
4. Reset the set point knob to the normal limit setting at 572
F (300 C).
5. Repeat Steps 2 through 4 with the fire tube high-temperature
switch.
6. Repeat Steps 2 and 3 with the refractory high-temperature
switch.
7. Reset the set point knob to the normal limit setting of
1472 F (800 C).
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