Troubleshooting; Replacing Batteries - Bosch 7 709 003 736 Installation Instructions Manual

Troubleshooting

6 Troubleshooting
6.1

Replacing batteries

When batteries are weak, the low battery symbol (Fig. 6,
pos. 5) will appear on the display.
B Remove the two screws on the back of the remote
control.
B Open the battery housing and remove the batteries,
then replace with new AA 1.5V batteries, ensuring
they are inserted correctly.
Verify that the rubber seal is correctly fitted
between both plastic housing parts.
B Close the battery housing using the two screws.
WARNING:
Dead batteries must be replaced. Conse-
quently, the manufacturer is not liable for
any faults or damage caused by dead bat-
teries.
Dispose of the dead batteries properly.
6.2 Cleaning
Use a damp cloth to clean parts of the remote control.
Do not use abrasive or solvent-based detergents.
6.3 Troubleshooting
1. No display on remote control
B Check for weak or dead batteries.
Remote control in sleep mode.
If not used for a few minutes, the remote's
display will go blank to save the batteries.
B Simply press any button on the remote to bring up the
display.
2. Remote control will not activate / no number with
rotating digit
B Ensure that you are standing directly in front of the
water heater when attempting to activate.
B Ensure that no other device in the area, such as a
cordless phone, is operating on a frequency similar to
the remote (868 MHz) and causing interference.
B Double check all wire connections of the remote con-
trol manual. Pay close attention to the wire connect-
ing the remote's PCB to the heater's main PCB.
B With no hot water running, press and hold the "
or " " buttons for 5 seconds on the locked out
18
3. Remote display shows "- -" only
B Verify the water heater's ON/OFF switch is turned to
the ON (I) position. If the water heater's display is still
blank, verify the heater is plugged properly grounded
outlet.
B Verify there is proper voltage to the water heater.
B Verify the remote is within the maximum distance
from the water heater of 30 meter (98 ft).
B Ensure that no other device in the area, such as a
cordless phone, is operating on a frequency similar to
the remote (868 MHz) and causing interference
Large amounts of metal or concrete in the
structure may have a blocking effect on the
remote's signal. This may alter the maxi-
mum distance allowable from the water
heater.
B Move within direct line of sight of the
water heater to see if signal will recon-
nect.
4. Error code and "
remote
• Error codes cannot be reset by using the remote. All
errors must be cleared by using the reset button
on the water heater's control panel.
• If an error code is gen erated immediately after the
installation of the remote control transceiver PCB,
ensure that the two large electrical connectors ( Fig.
5) on the main PCB are properly seated.
• Error code may not be resettable. Consult water
heater's installation manual.
5. Remote will not memorize desired temperature set-
ting
B Verify that the remote control "program" button is
depressed until the remote display reads "Pr".
Memorization of a selected temperature
only saves to the device on which it was
originally programmed. To retrieve a mem-
orized temperature setting, you must use
the device with which it was programmed.
6. Priority " " symbol will not clear
B Verify no hot water is being used when trying to clear
"priority" function.
" device (remote or water heater) until the "
bol (Fig. 6, Pos. 6) disappears.
" symbol will not clear from
6 720 680 078 (2011/09)
" sym-