STIEBEL ELTRON Accelera 220 E, Accelera 300 E Operation And Installation Manual

OPERATION AND INSTALLATION
FUNCIONAMIENTO E INSTALACIÓN
MODE D’EMPLOI ET INSTALLATION

DHW heat pump water heater
Calentador de agua con bomba eléctrica de calor
Chauffe-eau à thermopompe

» Accelera 220 E
» Accelera 300 E

Conforms to ANSI/UL Std. 499, 1995, 94-5 VA, 174
Certifi ed to CAN/CSA Std. C22.2 No. 110

Conforme a ANSI/UL Std. 499, 1995, 94-5 VA, 174
Certifi cación con CAN/CSA Std. C22.2 No. 110

Conforme à la norme ANSI/UL Std. 499, 1995, 94-5 VA, 174
Certifi é à la norme CAN/CSA Std. C22.2 No. 110

Tested and certifi ed by WQA to NSF/ANSI372
for lead free compliance.

Probado y certifi cado por WQA NSF/ANSI 372 para
el cumplimiento de las regulaciones sin plomo.

Testé et certifi é par WQA à la NSF/ANSI 372 pour
une utilisation sans plomb.

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CONTENTS

ACCELERA® 220 E QUICK START-UP GUIDE

OPERATION

1. General information _________________________________________7

2. Safety __________________________________________________________7

2.1 Intended use ______________________________________________________ 7

2.2 Incorrect use ______________________________________________________ 7

2.3 General safety instructions ____________________________________ 7

2.4 ETL designation __________________________________________________ 8

2.5 Appliance labels _________________________________________________ 8

3. Appliance description _____________________________________ 10

3.1 Heating the DHW tank _________________________________________11

3.2 Appliance operation outside the application limits ______ 11

3.3 Frost protection _________________________________________________11

4. Settings _____________________________________________________ 12

4.1 Display and controls ____________________________________________12

4.2 Settings ___________________________________________________________ 12

4.3 Calling up fault codes __________________________________________ 13

4.4 Rapid heating key ______________________________________________ 13

4.5 Emergency shutdown __________________________________________ 14

5. Maintenance and care _____________________________________ 14

6. Troubleshooting ____________________________________________ 15

6.1 Fault codes _______________________________________________________ 16

INSTALLATION

7. Safety ________________________________________________________ 17

7.1 General safety instructions ___________________________________ 17

7.2 Instructions, standards and regulations ___________________ 17

7.3 Incorrect use _____________________________________________________17

7.4 Qualifi cation _____________________________________________________ 17

8. Appliance description _____________________________________ 17

8.1 Standard delivery _______________________________________________ 17

8.2 Required accessories __________________________________________ 17

8.3 Further accessories_____________________________________________ 17

9. Preparations ________________________________________________ 17

9.1 Transport _________________________________________________________ 17

9.2 Storage ____________________________________________________________ 18

9.3 Installation site __________________________________________________ 18

9.4 Siting the appliance ____________________________________________ 19

9.5 Minimum clearances ___________________________________________ 19

10. Installation __________________________________________________ 20

10.1 Water connection _______________________________________________20

10.2 Condensate drain _______________________________________________ 20

10.3 Power supply ____________________________________________________ 20

10.4 Assembling the appliance ____________________________________ 22

11. Commissioning _____________________________________________ 22

11.1 Commissioning __________________________________________________ 22

11.2 Recommissioning _______________________________________________ 22

12. Shutting down ______________________________________________ 22

13. Troubleshooting ____________________________________________ 22

13.1 Fault table ________________________________________________________ 23

13.2 Resetting the safety pressure limiter _______________________23

13.3 Resetting the high limit safety cut-out _____________________23

13.4 Motor overload relay ___________________________________________ 23

14. Maintenance and cleaning ________________________________ 23

14.1 Removing the appliance cover _______________________________23

14.2 Removing the casing ring _____________________________________ 24

14.3 Cleaning the evaporator _______________________________________ 24

14.4 Draining the tank _______________________________________________24

14.5 Descaling the electric booster element ____________________ 25

14.6 Protective anode ________________________________________________ 25

14.7 Valves _____________________________________________________________ 25

14.8 Replacing the power cable ___________________________________ 25

14.9 Fitting the casing ring _________________________________________ 25

14.10 Fitting the appliance cover ___________________________________ 25

15. Specifi cation ________________________________________________ 26

15.1 Dimensions and connections _________________________________26

15.2 Wiring diagram _________________________________________________ 28

15.3 Data table ________________________________________________________ 29

16. Limited Warranty___________________________________________ 30

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SPECIAL INFORMATION

This manual includes important information regarding the safe
and effi cient handling of the water heater. Keep this manual with
the water heater at all times.

Work must only be carried out by a licensed installer who has read
and understands these instructions. All federal, state and local
codes must be followed. Failure to do so may result in equipment
failure, serious injury, or death.

While working on the water heater, disconnect the power supply.
Illustrations in these instructions are designed to aid a general

understanding and may deviate from the actual water heater ver­sion. No claims can be derived from such installations.

Limited liability:

We have collated all details and information in this manual in due
consideration of applicable standards and regulations, the state of
the art and our long-term know-how and experience.

Losses due to the following are excluded from our liability:

- Non-observance of these instructions

-Incorrect use

- Installation of water heater by unqualifi ed personnel

- Unauthorized modifi cations

- Use of unauthorized spare parts

For more information on liability, see the warranty section at the
back of this manual.

Copyright:

These operating and installation instructions are subject to copy­right.

Transferring these instructions to third parties, copying of any
kind, either in total or extracts therefrom, as well as their use
and/or conveying its contents are prohibited without our written
consent.

Violations are liable to claims for compensation. Further claims
are reserved.

We hold the copyright:

Stiebel Eltron, Inc.
17 West Street | West Hatfi eld, MA 01088
Tel. [phone] | Fax [phone]
Email [e-mail]
www.stiebel-eltron-usa.com

Should you have any questions regarding the installation or op­eration of the water heater, please contact our customer service.

Tel. (USA) 800-582-8423 or 413-247-3380

Please record your serial number and information:

Serial No.:

Date of purchase:

Register your product

NOTE:

You must register this product within 90 days
of purchase on our web site in order to acti­vate any standard warranty or to be eligible for
the extended warranty. Go to our website at:
www.stiebel-eltron-usa.com and click on “Register Your
Product.”

Before beginning the registration process, we suggest that you
gather the necessary information as follows:

000000-0000-00000

D0000035352

1

1 Serial number on the type plate

Type, Example: Accelera 220 E (the type plate can be found
on the appliance above the “DHW outlet” connection).
Number listed after “Nr.”
Place of Purchase
Purchase Date
First & Last Name
Email address
Physical Address
Phone Number

If you have any questions concerning the registration process
or warranty options, please contact Stiebel Eltron USA directly
at (800)-582-8423.

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QUICK START-UP GUIDE

General information

ACCELERA® 220 E QUICK START-UP GUIDE

Overview:

Installation of this water heater is similar to standard electric water heaters, with a few minor exceptions. Be sure to follow all state
and local codes during installation. This Quick Start-up Guide is not intended to be a substitute for the complete installation manual.
Be sure to follow all safety precautions.

Unpacking:

DO NOT unpack the water heater until it is located at the point of installation. Follow all instructions in the manual and be sure to use
caution, as this unit is top heavy. After unpacking, DO NOT lay the unit down and DO NOT jar or tip the unit past 45 degrees on a hand
truck. If the appliance has not been completely vertical during transport or setup, it must rest in a vertical position for at least one hour
before commissioning.

Installation of water connections:

1. Find a suitable location that fi ts the room spacing guidelines on the next page. The minimum volume of the room is 10´ x 10´ x
10´. Be sure vents are parallel to the wall with the fan facing the most open area along that wall. Please note: a drain pan is rec­ommended, and may be code in some areas.

2. The inlet & outlet plumbing connections on the unit are 1˝ male NPT. It is recommended to use union connections for easier ser­viceability. Install a boiler drain at the cold water inlet for easier draining of the tank.

3. The temperature & pressure (T&P) safety valve port is ¾˝ female NPT. A T&P valve is supplied which is rated to release water at
100 psi and/or 210°F. Plumb this connection to a bucket or directly to a drain. If it is plumbed to a bucket, check it often for any
accumulated water.

For hook-up, follow all state and local codes for check valves, expansion tanks, shut off valves, gauges, etc.

Note

A 70 psi (4.8 bar) pressure reducing valve must be in­stalled to ensure the pressure of the incoming water line
never exceeds 70 psi (4.8 bar). (See 10.1, “Water connec­tion”, pg. 20) .

Condensate drain:

Run the condensate drain connection directly into a drain or use a condensate pump to drain into a suitable location (See 10.2, “Con­densate drain”, pg. 20).

Fill & flush tank:

Run water and be sure the tank is full prior to turning on the electricity.

Installation/electrical:

Use a 240 Volt / 15 Amp double pole breaker and connect to the water heater L1,L2 & ground (See 10.3, “Power supply”, pg. 20).

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14˝

(0.4 m)

2´ (0.6 m)

8˝ (0.2 m)

6´ (1.8 m)

Air flow

intake

Air flow

intake

Air flow
exhaust

Air flow
exhaust

2´ (0.6 m)

Air flow

intake

Air flow
exhaust

6´ (1.8 m)

Minimum room volume:
800 ft

2

, 10´ x 10´ x 8´

(22.7 m2, 3 m x 3 m x 2.4 m)

Acceptable positioning, vent parallel to a wall:

Acceptable positioning, vent parallel to a wall in a corner:

An object
next to the
unit must
be less than
42˝ high

2´

(0.6 m)

2´

(0.6 m)

8˝ (0.2 m)

8˝

(0.2 m)

6´

(1.8 m)

≤42˝

(1.1 m)

› Do not install in a room

with less than 800 cubic
feet of total volume.

› Do not install with the air

exhaust pointing at a wall
or any surface closer than
6 feet away.

› Do not install with the air

intake pointing to a wall or
any surface closer than 2
feet away.

› If you are installing the

water heater next to
another appliance, it
cannot be taller than 42
inches. Otherwise, it will
obstruct air fl ow to and
from the unit.

› Failure to follow

installation instructions
will void the factory
warranty.

QUICK START-UP GUIDE

Required room dimensions and clearances

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QUICK START-UP GUIDE

Plumbing connections

HMC

Cold water

Hot water

2

11

14

12

13

10

3

4

5

6

7

8

9

1

1 Vacuum breaker
2 Hot water connection (1˝ NPT)
3 Mixing valve (optional, supplied by installer)
4 Connection for T&P valve (¾˝ NPT)
5 T&P valve ¾˝ NPT, 0.69 MPa @ 99°C (100 psi @ 210°F) (supplied with unit)
6 Expansion tank (required, supplied by installer)
7 Straight-through shut-off valve (supplied by installer)
8 Check valve (required, supplied by installer)
9 0.48 MPa (70 psi) pressure reduction valve (required, supplied by installer)
10 Cold water connection (1˝ NPT)
11 Condensate drain (¾˝ NPT to ½˝ barbed elbow, supplied with unit)
12 Drain valve (supplied by installer)
13 Drain pan (supplied by installer)
14 Condensate spillover

OPERATION

General information

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OPERATION

1. General information

The chapters “Special information” and “Operation” are intended
for appliance users and qualifi ed contractors.

The chapter “Installation” is intended for qualifi ed contractors.

Note

Read these instructions carefully before using the appli­ance and retain them for future reference.
Pass on the instructions to a new user if required.

2. Safety

This chapter provides an overview of all important actions re­quired for a safe and trouble-free operation.

2.1 Intended use

The appliance is intended for DHW heating within the application
limits (See 15.3, “Data table”, pg. 29).

The appliance is intended for domestic use, i.e. it can be used
safely by untrained persons. The appliance can also be used in a
non-domestic environment, e.g. in a small business, as long as it
is used in the same way.

Any other use beyond that described shall be deemed inappropri­ate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.

2.2 Incorrect use

The following are not permitted:

- Heating liquids other than potable water

- Operating the appliance with an empty DHW tank

- Operating the appliance outside the application limits (See

15.3, “Data table”, pg. 29)

- Interrupting the power supply, as without power supply the

appliance is not protected against corrosion

2.3 General safety instructions

Only qualifi ed contractors should carry out the electrical work and
installation of this appliance. Qualifi ed contractors are responsible
for adherence to all applicable regulations.

Operate the appliance only when fully installed and with all safety
equipment fi tted.

!

WARNING Injury
The appliance may be used by children aged 8 and up and
persons with reduced physical, sensory or mental capa­bilities or a lack of experience and know-how, provided
that they are super vised or they have b een instruc ted on
how to use the appliance safely and have understood
the resulting risks. Children must never play with the
appliance. Children must never clean the appliance or
perform user maintenance unless they are supervised.

WARNING Electrocution
Contact with live components presents a threat to life.
Damage to the electric insulation or to individual com­ponents may result in a threat to life.

 If there is damage to the insulation, disconnect the

power supply and arrange a repair.
All work on the electrical installation must be carried
out by a qualifi ed contractor.

WARNING Scalding
The water in the DHW tank can be heated to tempera­tures in excess of 149°F/65°C. There is a risk of scalding
at outlet temperatures in excess of 110°F/43°C.

 Ensure you do not come into contact with the water

when discharged.

WARNING Burns
Touching hot components can lead to burns.
When working on hot components, always wear protec­tive working clothing and safety gloves.
The pipework connected to the DHW outlet of the ap­pliance can reach temperatures in excess of 149°F/65°C.

WARNING Scalding
The appliance is fi lled with refrigerant at the factory.
In case of leaking refrigerant, avoid coming into contact
with the refrigerant or inhaling the released vapors. Ven­tilate the rooms affected.

!

CAUTION Injury
Never place any objects on top of the appliance. If objects
are left on the appliance, noise emissions may increase
due to resulting vibrations, and the objects could fall
and cause injury.

!

CAUTION
To reduce the risk of excessive pressures and tempera­tures in this water heater, install temperature and pres­sure protective equipment required by local codes and
no less than a combination temperature and pressure
relief valve certifi ed by a nationally recognized testing
laboratory that maintains periodic inspection of produc­tion of listed equipment or materials, as meeting the re­quirements for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems, ANSI Z21.22. This
valve must be marked with a maximum set pressure not
to exceed the marked maximum working pressure of the
water heater. Install the valve into an opening provided
and marked for this purpose in the water heater, and
orient it or provide tubing so that any discharge from
the valve exits only within 6 inches above, or at any
distance below, the structural fl oor, and does not contact
any live electrical part. The discharge opening must not
be blocked or reduced in size under any circumstances.

OPERATION

Safety

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!

CAUTION
Hydrogen gas is produced by this heater in a hot water
system that has not been used for a long period of time
(2 weeks or more). Hydrogen gas is extremely fl amma­ble. To reduce the risk of injury under these conditions,
it is recommended that the hot water faucet be opened
for several minutes at the kitchen sink before using any
electrical appliance connected to the hot water system.
When hydrogen is present, there will probably be an
unusual sound such as air escaping through the pipe as
the water begins to fl ow. There should be no smoking or
open fl ame near the faucet at the time it is open.

!

Material losses

If you disconnect the appliance from the power supply, it
is no longer protected against frost.

 Do not interrupt the power supply to the appliance.

!

Material losses

Never cover this appliance. Covering the air intake or air
discharge leads to a reduced air supply. If the air supply
is restricted, the operational reliability of the appliance
cannot be guaranteed.

!

Material losses

Only operate the appliance when the DHW tank has been
fi lled.

!

Material losses

Keep the appliance installation room free from air con­taminated with oil or salt and corrosive or explosive sub­stances.

2.4 ETL designation

The ETL designation shows that the appliance meets all essential
UL and CAN/CSA requirements. This appliance conforms to:

- UL Standard 1995

- UL Standard 174

- CAN/CSA Standard C22.2 No.236-05

- CAN/CSA Standard C22.2 No.110-94

2.5 Appliance labels

1. Type plate label for the Accelera 220 E

Accelera 220 E

Stiebel Eltron Inc.
17 West Street
West Hatfield, MA 01088, USA

800.582.8423
[e-mail]

Conforms to UL STD. 1995

Conforms to UL STD. 174
Certified to CAN/CSA STD. C22.2 No.236-05
Certified to CAN/CSA STD. C22.2 No.110-94

Part number/code article: 233058
Electrical/électriq ue

Voltage/tension: Single phase 220-240 V
Frequency/fréquence: 50 / 60 Hz
Breaker/disjoncteur: 15 A
P

nmax

(rated power input)/puissance nominale: 2200 W
Maximum allowable ratings/courant nominal: 2200 W, 9.17 A
Protection class/i ndicie de prote ction: IP 24

Heat pump/pompe à chaleur:

P

N

(Air 107.6°F / Water 149°F): 0.54 kW
Refrigerant/frigorigène: R-134a
Refrigerant charge/frigorigène poids de remplissage: 1.874 lb / 850g
Max. operating pressure/max. pression de service: 348.1 PSI / 2,400 kPa
Lock rotor curre nt/puissanc e blockade : 15.3 A
MCA: 14 A
Rated compressor load/courant nominale du compresseur: 2.5 A
Motor fan/moteur d e ventilateu r: 24 W

DHW cylinder/DHW cylindre:

Backup heating element/chauffage d'appoint: 1690 W
Max. operating pressure/max. pression de service: 87 PSI / 600 kPa
Max. operating temperature/max. temperature de service: 168.8°F / 76°C
Tank materi al/matériau réservoir: Steel
Nominal capacity/capacité nominale: 58.12 gal / 220 l
Tank test pressure/contrôle de réservoir: 130.5 pSI / 900 kPa

No.:#### / ######

Made in EU/Fabriqué en UE

Read the instructions carefully.
Tested for leaks.

Lira attentivement la notice.
Étanchéité testé.

285872-34892

XXXXXX-XXXX-XXXXXX

2. Condensate drain information label

315683-38055

Condensate

Condenso

311801-38055

Condensat

3. Hot water outlet location label

Hot Water Outlet

311803-38055

Salida de agua caliente

Sortie eau chaude

4. Cold water outlet location label

Cold Water Inlet

311802-38055

Entrada para agua fría

Entrée eau froide

5. Power connection information label

Power supply

Disconect power supply

Before opening the cover

!Attention!

Must connect to

240 V, 15 A

Double-pole

Circuit breaker

OPERATION

Safety

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6. Scald risk information label

Une température de l'eau de plus de 52°C (125°F) peut
causer des brûlures grave s ou la mort par éboui ll a n t a ge

Les enfants, les pe rsonnes handicapées e t les personnes
âgées courent le plus grand risque de brûlures.

Lire la notice d'emploi avant d'ajuster la température du
chauffe-eau.

Vérifier la température de l'eau avant
de prendre un bain ou une do uche .

Des dispositifs de limi ta ti on de te mp ér a t u re s ont
disponibles. Voir la notice d'emploi.

ATTENTION

L'eau chaude peut provoquer des brûlures de 3ème
degré:
En 6 secondes à 60°C (140°F).
En 30 secondes à 54°C (130°F).

Réglé à l'usine à 52°C (125°F).
Contacter le personnel de service après-vente qualifié
pour toute modification.

Agua con temperatura de más de 52 °C (125 °F) puede
al instante causar quemaduras graves o la muerte por
escaldadura.

Niños, personas con discapacidades o mayores se
encuentran en mayor peligro de escaldadura.

Mire las instrucciones de uso antes de ajustar la
temperatura en el calentador de agua.

Pruebe el agua antes de bañarse o de ducharse.
Están disponibles válvulas para regular la

temperatura. Mire las instrucciones de uso.

ADVERTENCIA

Agua muy ca lien te p uede ca us a r quem a d ur a s
de 3 grado. En 6 segundos A 60 °C (140 °F).
En 30 segundos A 54 °C (130 °F).
La regulación fue ajustada en la producción
A 52 °C (125° F ). Si n ece si t a ajustar la re gu lac ió n ,
contácte al técnico de servicio calificado.

er

AQUA CALIENTE

ABRASAR

52

125

7. Gasket connection information label

311804-38055

For reason of corrosion protection use
flat gasket ring. Never seal threadshemp
(equipment Damage!).

Pour des raisons de protection contre la
corrosion, le raccordement est à réaliser
par joints plats. L'étanchéïfication au
chanvre n'est pas autorisée
(dommages au matériel!).

Para la protección contra la corrosión use
sellos planos de los tubos. Una unión
con cáñamo no está permitida
(riesgo de daño del equipo!).

8. Pressure & temperature relief valve information label

315321-38055

Relief valve

Plumber:
The relief valve installation must be fitted to this socket.
The pressure and temperature relief valve has to meet
local codes and comply with ANSI Z21.22.

Soupape de sûreté

Plombier:
L'installation de la soupape de sûreté doit être branchée sur cette prise.
La soupape de sûreté pour la pression et la température doit être conforme
à la réglementation locale et à ANSI Z21.22.

Válvula de seguridad

Plomero:
La válvula de seguridad debe instalarse en esta conexión.
Las válvulas limitadoras de presión y temperatura tienen que
ajustarse al código local y cumplir con la norma ANSI Z21.22.

9. Kyoto protocol information label

ES: Sistema herméticamente cerrado que contiene gases de efecto invernadero mencionados en el protocolo de Kioto.
BG: Съдържа посочените в Протокола от Киото флуорирани парникови газове - херметически затворена система.

299581-36960

10. Supplemental heat element information label

315322-38055

If the water heater is retrofitted with a supplemental heat element
make sure that both thermostat are adjusted on the same
water temperature set point.

Si le chauffe-eau est rénové avec un élément de chauffe supplémentaire,
assurez-vous que les deux thermostats soient ajustés
à la même température de réglage de l'eau.

Si el calentador de agua está adaptado a un elemento calentador
suplementario, asegúrese que ambos termostatos estén ajustados
a la misma temperatura de agua.

OPERATION

Appliance description

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11. Booster heater element information label

CAUTION

for use only in water

ATTENTION

ATENCIÓN

:

:

315683-38055

:

pour l'utilisation dans l'eau

se usa sólo para en agua

12. Appliance must be vertical for at least one hour before com­missioning information label

WARNING / WARNUNG

The unit must remain in vertical position for at least
one hour before putting unit into operation.

Die Anlage muss min. 1 Stunde lang vor deren
Inbetriebnahme in senkrechter Position bleiben.

L’appareil doit être placé en position verticale
au moins une heure avant sa mise en route.

La unidad tiene que quedar en la posición vertical
al menos durante una hora antes de poner la unidad
en funcionamiento.

315125-38055

3. Appliance description

The appliance is designed for indoor installation. The appliance
recirculates ambient air and does not require outdoor air. The
appliance extracts heat from the ambient air. This heat is utilized
to heat the water in the DHW tank with added electric power. The
amount of electric energy and time required to heat-up the DHW
depends on the temperature and humidity of the ambient air.

This heat extraction results in a drop in the ambient temperature
inside the installation room by between 2°F/1°Cand 5.5°F/3°C.
The appliance also extracts moisture from the air, which turns
into condensate. The condensate is drained from the appliance
via the condensate drain.

When a hot water draw-off point is opened, the hot DHW is pushed
out of the appliance by the in-fl ow of cold DHW.

To protect against corrosion, the inside of the DHW tank is coated
with special enamel and is additionally equipped with an im­pressed current anode.

The electronic control unit makes energy saving adjustments eas­ier. Subject to the power supply and usage pattern, the water is
heated up automatically to the set temperature.

Heat pump operating principle
A hermetic circuit within the appliance contains refrigerant (See

15.3, “Data table”, pg. 29). This refrigerant evaporates at low
temperatures and collects heat from the ambient air.

In the evaporator, the refrigerant changes from its liquid into its
gaseous state. A compressor draws in the gaseous refrigerant
and compresses it. This increase in pressure raises the refrigerant
temperature.

The compression process requires electrical energy. The energy
(motor heat) is not lost, but is discharged to the downstream
condenser. The cooled refrigerant passes a fi lter dryer. There, the
refrigerant indirectly transfers heat to the DHW tank and the liquid
refrigerant is routed t o a two-fl ood evaporator. An expansion valve
then reduces the still prevalent pressure and the cycle starts again.

Note

In the event of an interruption of the power supply, the
compressor is blocked from operating for at least one
minute. The electronic control board (ECB) delays elec­tronic starting for one minute while the appliance goes
through its initializing process.
If the compressor subsequently fails to start, it may be
blocked by additional safety devices (Klixon and high
pressure switch). If the compressor is switched off due
to the Klixon, the pressure difference between the high
and low pressure sides of the refrigerant circuit may be
the cause. When the pressure difference is equalized
(approximately 5 minutes), the compressor turns on. If a
tripped high pressure switch caused the blocking of the
compressor, this may be due to a failed thermostat or
high ambient air temperature. After the power supply has
been re-established, the appliance continues to operate
with the parameters that were selected before the power
supply was interrupted.