Transcript Slide 1

AFD/TFD Service
Agenda
• Set-up
• Fault code retrieval
• Testing unit
components
• Testing the power
door
• Cleaning
Set Up Mode
Pre Filter
• In the Set Up Mode
you can
– Set the cleaning
interval for the pre
filter
– Set the cleaning
interval for the
collector cells
– Set the power level
Dirty
Clean
R3
Collector Cells
Dirty
R3
Power Level
Dirty
R3
R2
R2
R2
R1
R1
R1
Y4
Y4
Y3
Y3
Y2
Y2
Y1
Y1
G3
G3
G2
G2
G1
G1
Clean
Y4
Y3
Y2
Y1
G3
G2
Clean
G1
Set-Up Mode
• Enter the set up mode by
pressing and holding
power and reset buttons
for 5 seconds
• The display will indicate
how the unit is
programmed
• The factory settings are
displayed
• To change settings press
power button once
Dirty
R3
R2
R1
Y4
Factory Settings
Y3
Y2
Y1
G3
G2
Clean
G1
Set-Up Mode
Pre-Filter
• Scroll through the
settings by repeatedly
pressing reset button
• To save the settings and
advance to the next
setting press the power
button once
• Exit the set up mode by
pressing and holding
power and reset buttons
for 5 seconds
Dirty
Clean
Collection Cells
Power Level
3 Months
9 Months
9.6 KVDC
R3
R3
R3
R2
R2
R2
R1
R1
R1
Y4
Y4
Y4
Y3
Y3
Y3
Y2
Y2
Y2
Y1
Y1
Y1
G3
G3
G3
G2
G2
G2
G1
G1
G1
Time Delays
• 10 second time delay on a call for cooling
• 90 second time delay on a call for heating
• 10 minute time delay anytime the power to the
air cleaner is turned off and on.
Pow er On Delay
100
700
90
80
600
Time in Seconds
Time in Seconds
Thermostat Call Delay
70
60
50
40
30
20
10
500
400
300
200
100
0
0
1
2
1
Normal Operation
• During normal
operation the green
LED #1 with flash
slowly when the
blower is operating
• There may be some
other LED’s on based
upon time to clean
intervals
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
Need for Service
• Three yellow flashing
LED’s indicates the
controls have detected 10
consecutive high voltage
shut downs
• Three red flashing LED’s
indicates the controls
have detected the same
fault 3 times in a row after
a high voltage shut down
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
Fault Code Retrieval
• To enter the fault code log
– Go into the set up mode
(press and hold power and
reset for 5 seconds)
– Press and hold reset for 10
seconds
• Display goes out
• Green LED #1 and a
combination of yellow and
red LED’s indicate the
first recorded fault in the
log
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
Fault Code Log
• Matching the pattern of LED flashes will give an indication of what
fault has been posted to the fault code log
• The column on the right of the chart will provide the recommended
service procedure for that fault
• An example is service procedure #5 is for repetitive arcing. The
service procedure is to clean collection cell and field charger and
check for arcing through plastic frame to cabinet
Clear Fault Code Log
• To clear all 3 fault codes from the log
– Press and hold the reset button 2 to 4
seconds while the fault codes are being
displayed
– The red and yellow LED’s will go out
– The green LED will remain on to indicate
which fault code number is being displayed
• To exit fault code log press and hold the
power and reset buttons for 5 seconds
Test Unit Components
• There are 4 tests that can be performed
using internal unit controls
– High voltage relay test
– LED test
– High voltage output test
– Thermostat input test
Test Unit Components
• Entering the component test mode
– Press and hold the power button until all ten LED’s
come on then release the power button. The air
cleaner is now off and LED’s should step off one at a
time
– Press the reset button 3 times in a row within 20
seconds of the LED’s stepping off
– The pre-filter light will come on
– Quickly press and hold the power and reset buttons at
the same time
– The pre-filter LED will begin to flash and continue to
flash as long as the unit is in the component test
mode.
• The green LED #1 should be on
Test Unit Components
The green LED’s will show which of the tests the
controls are in
High Voltage Relay Test
• Green LED #1 “on” indicates high voltage relay
test mode
• There are 3 tests within the high voltage relay
section
• Yellow LED’s indicate the test being performed
High Voltage Relay Test
• The red LED’s show
the condition of each
test
• The read out
indicates
– High Voltage Relay
test
– High voltage input
current test
– Condition is within
range
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
LED Test
• To advance from the
high voltage relay test
to LED test press the
power button once
• All 10 LED’s will come
on
• Press the reset button
once to turn each
individual LED off
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
High Voltage Output Test
• Pressing the power button once will advance the
controls to high voltage output test
• There are 4 high voltage output tests in this
section
• The tests range from 0 VDC to 9.6KVDC output
High Voltage Output Test
• Green LED’s 1 & 2 will be on for
these tests
• Yellow LED’s indicate which test is
being performed
• Red LED’s indicate the condition of
the test
• The display indicates
– High voltage output test (Green LED’s)
– 9.6KVDC output test (Yellow LED)
– Output is within range (Red LED)
• If test 1 is rerun after completing
other tests it will take a few seconds
for the condition to come into range
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
Thermostat Input Test
• Press the power button once to advance to thermostat
input test
• There are 3 tests in this section
• A thermostat call for heat (W)
• A thermostat call for indoor blower (G)
• 24VAC input to the air cleaner
Thermostat Input Test
• This display indicates
– Thermostat input test
(green LED)
– A thermostat call for
indoor blower (G)
(yellow LED)
– 24VAC input voltage is
below minimum range
(red LED)
• Low 24VAC input
could be the result of
VA rating of
transformer
R3
R2
R1
Y4
Y3
Y2
Y1
G3
G2
G1
Exiting Component Test
• There are 3 ways to exit the component
test mode
• Press and hold the power and reset
buttons of 5 seconds
• Remove 24 volt power supply to the air
cleaner
• Wait 5 minutes without touching any
buttons
Power Door Test
• Tools required
– A high voltage probe and
compatible volt/ohm meter
or
– A screwdriver, jumper wire
with alligator clips, tape
and dry paper
• Turn off the air cleaner
and remove the power
door
• Form a piece of wire to
be used to depress the
door interlock switch
Power Door Test
Caution high voltage is present
for this test
• Turn the air cleaner on and
enter the set up mode
• Adjust the power setting for
normal (9.6 KVDC)
• Exit the set-up mode and wait
for green LED #1 to begin to
flash
• Connect the high voltage
probe per manufacture
instructions
• Touch the center contact of the
power door
• The voltage should read
9.6KVDC +/- 600 volts
Power Door Test
• Using a screwdriver,
jumper wire, and dry
paper
• Tape a piece of paper
to the screwdriver
extending ½” beyond
the end
• Connect the jumper
wire from the
screwdriver shaft to
the ground contact of
the power door
Power Door Test
•
•
•
•
•
•
•
•
•
Form a piece of wire to depress the door interlock switch
Turn the air cleaner on and enter the set up mode
Adjust the power setting to normal (9.6KVDC)
Wait for green LED #1 to begin to flash
Take the plastic handle screwdriver move it close to
center power door contact
When the paper touches the center contact the power
supply should arc to the screwdriver
When the arc occurs the power supply will shut down for
10 minutes
If the arc occurs when the paper is near or touching the
contact the power supply is good
If no arc occurs the power supply is bad. Replace the
power door
Cleaning
• Pre-filter cleaning
– The pre-filter may be vacuumed or washed
– It should be completely dry before re-installing
• Collection cell cleaning
– The collection cells may be vacuumed or
washed
– Vacuum both sides
– Wash using low pressure sprayer. Warm
water will remove some residue
Cleaning
• Do Not
– Use soap or detergents on collection cells
– Immerse collection cells completely in water
– Place collection cells into a dishwasher
• If water is used in cleaning collection cells
– Slightly tap the collection cell to remove water
– The collection cell must be dry before re-installing
• Reset filter timers
– Reset pre-filter timer: press and hold the reset button
until pre-filter LED goes out (1 to 2 seconds)
– Reset collection cell timer: press and hold reset
button until collection cell LED’s go out (4 to 5
seconds)
Cleaning
• Cleaning field charger
– Field charger should
be cleaned annually
• Turn air cleaner off
and remove power
door
• Bend field charge
locking tab down and
remove field charger
• Wipe face plate with
dry shop towel or
vacuum
Field charger locking tab
Field Charger Cleaning
• Power off for minimum 15
seconds
– Remove from case and lay
on flat surface
• Bend locking tab down
and remove field charger
• Wipe face with shop
towel
– Do not disassemble the
field charger
• Use a piece of foam to
clean ionizing pins and
faceplate leading edges
– Ionizing pins are easy to
bend
Cleaning
• Caution field charger pins
are sharp
– Do not bend pins
– Wear gloves
• Use a block of foam to
clean the pins
– Push the foam block over
the pin
– Rotate the foam block
– Use the foam block to
clean faceplate opening
edges
• Reinstall field charger
and bend one locking tab
Trouble Shooting
• Air Passing Through the Cleaner Emits a
Slight Sound
– Select Lower “Power Setting” in the “Set Up”
Mode to Reduce
– Minimal Impact on Cleaning Efficiency
AFD/TFD Summary
• What we covered
– Set-up
– Fault code retrieval
– Testing unit components
– Testing the power door
– Cleaning
• There is a more detailed training available
from Learning Resources. Look for details
on Thursday during the general session.