Human Touch ht 7450 User manual

©2009 Human Touch, LLC. All rights reserved.
May 29, 2009
Please forward any questions or comments regarding this Troubleshooting Guide to
[email protected].

HT-7450 Troubleshooting Guide 1
HT-7450 Troubleshooting
This Troubleshooting Guide walks you step-by-step through the
diagnosis of HT-7450 customer problems. It is important to follow
these steps carefully, to ensure that the problem is diagnosed
correctly, and therefore the appropriate repair action is taken.
Getting Started
1. Turn the power switch on the back of the chair to Off, wait
approximately five seconds, then turn it back On.
2. Wait 30 seconds while a system check is performed, then verify
that the problem still exists.
3. If the problem still exists, choose from the following issues:,
To Troubleshoot This
Issue: Do the following:
There is no movement
on the chair when I
power it on
The backrest massage mechanism and the foot
and calf massager paddles should move when
you power on the chair. If they do not, see
"Power" on page 3.
The Width LEDs on the
foot and calf massager
are flashing
Verify that the cables connecting the backrest
to the left-hand side of the chair base are
securely connected. If the connection is
secure, there is a faulty power connection
within the chair. Replace the chair base. If this
does not solve the problem, replace the
backrest.
My remote control is
not working properly
See "Remote" on page 4.
My backrest is not
massaging properly
If the Kneading, Percussion, Compression or
rolling massage functions are not working,
replace the backrest.

2HT-7450 Troubleshooting Guide
My heat is not working
properly
See "Heat" on page 4.
My Massage Comfort
Control is not working
properly
See "Massage Comfort Control" on page 5.
My seat massage is not
working properly
• If the seat massage does not work at all—the
air pump is not working properly. Replace
the chair base. DEALER NOTE: You may
wish to replace the air pump assembly
instead of the chair base.
• The seat massage air bags inflate, then stay
inflated, or only partially inflate—replace the
chair base.
My backrest won’t
recline/incline
Make sure you are pressing and holding the
recline/incline button for at least five seconds; it
can take several seconds to activate.
See "Backrest Recline/Incline" on page 6.
My foot and calf
massager is not
massaging properly
If the foot and calf massager hesitates while
changing directly, this is due to the gears
shifting, and is perfectly normal.
If the foot and calf massager is only massaging
on one side, or not massaging at all, replace the
foot and calf massager.
My foot and calf
massager won’t
raise/lower
If the foot and calf massager will not raise or
lower, and the remote beeps when you push
the legs up and legs down buttons, replace the
foot and calf massager actuator.
If replacing the actuator does not solve the
problem, the problem may be in the module
that controls the actuator. Replace the chair
base.
My foot and calf
massager width control
is not working properly
The foot and calf massager width adjustment is
subtle; therefore the difference between the
settings may not be visually noticeable.
You must press and hold the width buttons to
adjust the width setting. Some LEDs may not
light as the width is adjusted to the new setting,
however when you release the width button the
LEDs indicate the current setting.
If the width LEDs do not light, see "Resetting
the Foot and Calf Massager Width LEDs" on
page 4 for further instructions.
My convenience outlet
is not working
See "Convenience Outlet" on page 6.
To Troubleshoot This
Issue: Do the following:

HT-7450 Troubleshooting Guide 3
Power
Step 1: Check the power cord
1. Verify that the power cord connection to the chair’s power panel is
secure and that the cord is not damaged.
2. If the power cord is damaged, replace the power panel.
Step 2: Check the wall outlet
1. Plug a different device into the AC outlet into which the chair is
plugged.
2. If the device does not work (is not receiving power), the AC outlet is
most likely not working. Plug the chair into a different AC outlet to
verify that it receives power.
Step 3: Replace the AC outlet fuse
The AC outlet fuse is the left of the two fuses, located on the power
panel.
To replace the fuse:
1. Turn the power switch to OFF and unplug the chair from the wall
outlet.
2. Using your fingers, open the fuse compartment on the power panel,
then turn the left-hand fuse holder knob (located on the power
panel) counter-clockwise to remove it.
3. Replace the fuse with a new fuse of the same rating.
4. Reinsert the fuse holder into the power panel, then turn it clockwise
to secure it.
5. Close the fuse compartment lid.
6. Plug the chair back into the wall outlet and turn it on.
7. Verify that the chair is now receiving power.
Step 4: If the chair is still not receiving power, replace the
chair base
If this does not solve the problem, replace the backrest.

4HT-7450 Troubleshooting Guide
Remote
If one or more remote control LEDs do not light when you
push the corresponding button, but the function the button
controls works properly:
The remote control is not working properly. Verify that the remote control
cable connection to the backrest cover is secure. If that does not solve
the problem, replace the remote.
If the remote control LED lights but the function it controls
is not working properly:
The problem is most likely in the function controlled by the remote, not
in the remote itself. See "Getting Started" on page 1 and locate the
locate the function that is not working in the troubleshooting table.
Resetting the Foot and Calf Massager Width LEDs
To reset the foot and calf massager width LEDs:
1. Press and hold the (—) button until the massager reaches its
narrowest position.
2. Press and hold the (+) button until the massager reaches its widest
position.
3. Verify that the LEDs are now working properly. If they are not,
replace the foot and calf massager.
Heat
IMPORTANT
The heater heats slowly, taking at least five minutes to warm
up.
1. Press the Heat button on the remote control (the Heat LED lights).
2. Watch the remote control timer until it counts down at least five
minutes.
3. Check the left and right sides of the backrest to determine if either
side feels warm.
4. If either side does not feel warm, replace the backrest.

HT-7450 Troubleshooting Guide 5
Massage Comfort Control
This section assumes that the air bags are not inflating/deflating as you
adjust the Massage Comfort Number.
1. While adjusting the Massage Comfort Number, listen carefully for
the sound of the air pump.
2. If you can hear the air pump running softly:
a. Check the air tubing connection to the back of the left-hand
armrest to make sure the connection is secure.
b. Remove the tubing from the armrest, then check to see if the
white plastic end of the fitting has broken off and is stuck inside
the armrest. If this is the case, replace the tubing/fitting.
3. If you can hear the air pump running loudly:
a. Using two hands, pull outward on the left-hand side panel to
separate it from the chair.
b. Check to see if the air hose tubing has detached from the fitting.
c. If the tubing is detached from the fitting, reattach it, then secure
it by sliding the white zip tie firmly over the fitting connection.
4. If you cannot hear the motor running, the air pump is not working
properly. Replace the chair base.
DEALER NOTE: You may wish to replace the air pump instead of the
chair base.

6HT-7450 Troubleshooting Guide
Backrest Recline/Incline
The remote beeps once when Recline/Incline buttons are
pushed:
If you hear a single beep when you push the Recline and Incline
buttons, it means the backrest actuator is receiving power. Therefore the
actuator itself is not working properly. Replace the backrest actuator.
The remote beeps twice when Recline/Incline buttons
pushed:
If the backrest is in a fully inclined position and you hear two beeps
when you push the Recline button, it means the safety sensor has likely
failed.
1. Make sure that nothing is pressing on the safety sensor.
2. Tap the safety sensor with your foot to ensure that it didn’t get stuck
during shipping.
3. If the problem still exists, replace the rear shroud.
Convenience Outlet
NOTE
This section pertains to 120-volt products only; 230-volt
products do not contain convenience outlets.
The convenience outlet fuse is the right of the two fuses, located on the
the power panel at the rear of the chair base.
1. Verify that the device being plugged into the convenience outlet
does not draw more than 1 Amp of power. (If it does, it cannot be
plugged into the convenience outlet as it will blow the fuse).
2. Verify that the device being plugged into the convenience outlet
works when plugged into a wall outlet.
3. Turn the power switch to OFF and unplug the chair from the wall
outlet.
4. Using your fingers, open the fuse compartment on the power panel,
then turn the left-hand fuse holder knob (located on the power
panel) counter-clockwise to remove it.
5. Replace the fuse with a new fuse of the same rating.

HT-7450 Troubleshooting Guide 7
6. Reinsert the fuse holder into the power panel, then turn it clockwise
to secure it.
7. Close the fuse compartment lid.
8. Plug the chair back into the wall outlet and turn it on.
9. If the convenience outlet is still not receiving power, replace the
power panel.

Human Touch, LLC
3030 Walnut Ave.
Long Beach, CA 90807
humantouch.com