Troubleshooting; Tempra Plus Error Code Reporting; Resetting The Safety Thermal Cutout - STIEBEL ELTRON TEMPRA 12 TREND Operation And Installation

INSTALLATION

TROUBLESHOOTING

12. Troubleshooting
Symptom Possible cause
No hot water circuit breakers off
not enough flow rate to acti-
vate unit
flow sensor clogged/not
spinning
water heater not plumbed
correctly
Not enough hot filter screen clogged
water/restricted scale built up on heating
hot water flow elements
Water not hot water flow rate too high
enough
voltage too low
safety thermal cutout has
tripped
If you are not able to resolve a problem please contact us toll free at
800-582-8423 before removing the unit from the wall.
Stiebel Eltron is happy to provide technical assistance. In most
instances, we can resolve the problem over the phone.

12.1 Tempra Plus error code reporting

The Tempra Plus features the capability to self-diagnose and
report operational issues that it encounters. For information on
how the error will be shown on the Tempra Plus display see the
section "Tempra Plus error menu", pg. 9.
Error Cause
2 inlet temperature sensor failure contact Stiebel Eltron techni-
3 outlet temperature sensor
failure
14 | TEMPRA TREND & TEMPRA PLUS
Solution
turn circuit breakers on
clean filter screen at unit
clean faucet aerator or
shower head
remove flow sensor and
blow through it to make sure
wheel is spinning
ensure cold water entering
on right side and hot outlet
exiting on left side
clean filter screen at unit
descale the heating elements
using a descaling solution
reduce water flow rate until
power light on front cover
stops blinking
supply correct voltage to unit
turn off power supply, reset
safety thermal cutout
Solution
cal support.
ensure the outlet temperature
sensor cable is connected to
the main control board
contact Stiebel eltron techni-
cal support

12.2 Resetting the safety thermal cutout

DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of
this water heater unless power to the unit has been
completely shut off at the circuit breakers.
The safety thermal cutout on the Tempra is designed to cut off
electrical power to the heating elements if water of a too high
temperature is encountered. When one of these safety cutouts
have tripped, they must be reset manually.
1
1 Thermal safety cutouts
To reset the safety cutouts, follow the following procedure:
Turn off all circuit breakers attached to the water heater
Open the front cover of the water heater
Identify the safety thermal cutouts on the top of the cop-
per heating canisters. The buttons at the top are the reset
buttons.
Press down on the buttons, take note of whether they click
when pressed or not.
A heating canister that needs to be repeatedly reset may have a
technical issue that should be addressed by Stiebel Eltron tech-
nical support.
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