AccuTemp E6 SERVICE MANUAL
EVOLUTION
ELECTRIC
SERVICE MANUAL
ACCUTEMP PRODUCTS INC
8415 N. CLINTON PARK DR ● FORT WAYNE, IN 46825 ● 800 480-0415 ● www.accutemp.net
SP8027-1203 Email: service@accutemp.net
IMPORTANT FOR YOUR SAFETY
The Safety Instructions listed on this page below, should be posted
in a prominent location as a reminder of safe practices; as well as,
recommended actions to follow in the event of an equipment
or facility’s utility issue.
WARNING
In the event of a Power Failure, DO NOT attempt to operate this appliance.
WARNING
DO NOT store or use Gasoline, or any other Flammable Vapor and/or Liquids in the vicinity of this
or any other appliance.
WARNING
IMPROPER installation, adjustment, alteration, service, or maintenance can cause personal injury
or death; and/or property damage. Read the installation, operation, and service/maintenance
instructions thoroughly; before installing or servicing this equipment.
WARNING
Only QUALIFIED service technicians/electricians should perform the equipment installation, to
ensure that all electrical and safety requirements are met; and that all wiring is performed in
accordance with all national, state, and local electrical codes.
SP8027-1203 i
WARNING SYMBOL DEFINITIONS
SYMBOL DEFINITIONS
Symbols are used to attract your attention to possible dangers. They are only effective if
the operator uses proper accident prevention measures. Some of the symbols are boxed
text; while others maybe just picture icons. Please give this information the respect they
deserve for safe operation.
Warning Text Boxes
Below are denitions of the warning text boxes.
DANGER
Indicates an imminently hazardous situation;
which, if unchanged, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation;
which, if unchanged, will result in death or
serious injury.
Symbol Icons
Below are denitions of the symbol icons used
in this manual.
ALERT
Noties the reader of an important
message or warning; usually a
safety related message.
INFORMATION
Noties the reader of an important
information that may or may not
be safety related.
CAUTION -
CAUTION
Indicates a potentially hazardous situation;
which, if unchanged, will result in minor or
moderate injury.
HOT SURFACE
DANGEROUS
VOLTAGE
NOTE
Advises the reader of information or
instructions, vital to the operation or
maintenance of the equipment.
SP8027-1203 ii
EARTH GROUND
SAFETY PRECAUTIONS
DANGER
ELECTRICAL SHOCK HAZARD WHILE WORKING ON
ENERGIZED EQUIPMENT.
Unplug equipment prior to removing any components effected by electricity.
BURN HAZARD WHILE WORKING ON STEAM PRODUCING
EQUIPMENT.
When accessing the cooking chamber, be sure to always stand back while slowing
opening the door to allow the chamber to vent off the steam. Never reach into the cooking
chamber before it has completely vented off the steam.
Never reach into the cooking chamber or handle hot items without wearing the proper
heat protective gloves. Steam coming out of the holes on the right side of the cooking chamber
is invisible and can cause severe burns.
Water inside the steam chamber, creating steam, has a temperature of 212°F and will
cause burns if touched or spilled on the skin.
PERSONNEL INJURY HAZARD WHILE PICKING UP OR
MOVING HEAVY EQUIPMENT.
Always use 2 people and proper lifting techniques when picking-up, moving, or
ipping-over heavy equipment.
SLIP & FALL HAZARD WHILE WORKING ON WATER
HOLDING EQUIPMENT.
Keep the oor in front of the equipment clean and dry. If spills occur, clean them up
immediately to avoid potential injuries.
SP8027-1203 iii
WARNING & CAUTION NOTES
WARNING
ONLY QUALIFIED SERVICE TECHNICIANS
SHOULD PERFORM MAINTENANCE ON
THIS EQUIPMENT.
CAUTION
DO NOT• use abrasive materials, such as wire brushes or metal scouring pads to
clean the Water Sensors.
DO NOT• use Aluminum Oxide Sandpaper to clean the Water Sensors. It leaves a
residue that will not allow Water Sensors to work properly.
DO NOT• manually ll water above the Water Level Mark on the left side of steam
chamber above the High Limit Level Sensor.
SP8027-1203 iv
TABLE OF CONTENTS
SAFETY
Important For Your Safety.......................................................................................................................................i
Warning Symbol Denitions..................................................................................................................................ii
Safety Precautions................................................................................................................................................iii
Warning & Caution Notes.....................................................................................................................................iv
T.O.C. & MANUAL HISTORY
Table of Contents...............................................................................................................................................v-vi
Revision Sheet........................................................................................................................................................1
NOTES
Troubleshooting Notes...........................................................................................................................................2
OPERATIONAL & COMPONENT INFORMATION
Purpose Reference of Main Component Chart...................................................................................................3-5
Additional Component Part Numbers....................................................................................................................5
Sequence of Operation........................................................................................................................................6-7
Modifying Control/Keypad Program Settings.......................................................................................................8
TROUBLESHOOTING
Troubleshooting Flow-Diagram.............................................................................................................................9
Flow-Diagram Reference Troubleshooting Chart..........................................................................................10-12
COMPONENT REMOVAL & INSTALLATION
Location of Electrical Components Picture Overview.........................................................................................13
Electrical Components Removal & Installation.............................................................................................14-19
Cord & Plug Assembly................................................................................................................
Fuses............................................................................................................................................
Contactor.....................................................................................................................................
Transformer.................................................................................................................................
Water Sensor Control Board.......................................................................................................
Control Relay #1.........................................................................................................................
Water Sensors..............................................................................................................................
Control/Keypad Board................................................................................................................
Door Switch................................................................................................................................
Chamber Pressure Switch...........................................................................................................
Solid State Relay.........................................................................................................................
Temperature (RTD) Probe...........................................................................................................
Overtemp Switch (ThermalLimit SW3)............................[2 PERSONS REQUIRED].............
14
14
14
15
15
15
16
16
17
18
18
19
19
SP8027-1203 v
TABLE OF CONTENTS
COMPONENT REMOVAL & INSTALLATION (CON’T)
Location of Cast Heater Picture Overview..........................................................................................................20
Cast Heater Replacement Kit...............................................................................................................................21
Cast Heater Removal & Installation.............................................. [2 PERSONS REQUIRED]....................22-24
Cast Heater Installation Notes & Cautions..........................................................................................................24
Miscellaneous Components Removal & Installation.....................................................................................25-26
Auto-Fill Valve............................................................................................................................
High Water (Overll) Reed Switch.......................................[2 PERSONS REQUIRED]..........
Float Ball (Magnetic)...................................................................................................................
Drain Ball-Valve...........................................................................................................................
Drip Pan.......................................................................................................................................
Door Components Removal & Installation....................................................................................................27-29
Door Assembly.............................................................................................................................
Inner Door Panel..........................................................................................................................
Door Handle Latch Assembly......................................................................................................
Door Hinge...................................................................................................................................
Door Gasket..................................................................................................................................
25
25
26
26
26
27
27
28
28
29
SCHEMATIC & CHARTS
Electrical Schematic AT1T-3595 Rev G (208-240V/ 1Φ)...................................................................................30
Electrical Schematic AT1T-3595 Rev G (208-240V/ 3Φ)...................................................................................31
Electrical Schematic AT1T-3595 Rev G (208-240V/ 3Φ/ 17KW)......................................................................32
Electrical Schematic AT1T-3595 Rev G (440-480V/ 3Φ)...................................................................................33
SP8027-1203 vi
REVISION SHEET
Current Revision: 1203 Prior Revision: N/A
Date: 3/31/12 Date: N/A
Change:
Initial Release.
SP8027-1203 Pg 1
TROUBLESHOOTING NOTES
TROUBLESHOOTING NOTES
If the steamer is not reaching temperature:
Ensure that the steamer is not in the HOLD Mode verses the COOK Mode. The •
default mode for the steamer, when the PWR button is turned ON, is COOK. So, if
the operator presses the Timer Button then the Cook/Hold button; the operator has
just placed the steamer in the HOLD Mode and the steamer will not reach 212°F
(COOK Mode).
Ensure that the steam vent (located on the back of the steamer) is not blocked or •
clogged. If the customer has added an extended exhaust pipe, this could increase
the chances of vent blockage, if the exhaust pipe is not installed properly. The
exhaust pipe should be made of copper, galvanized or stainless steel. The exhaust
pipe should have a diameter of 3/4”; and be sloped 1/4” for every 12” of length
(recommend a height no greater than 24”). Also, the addition of extra ttings that
can alter the gravitational ow of the steam condensation, can cause blockage. If
vent blockage does occur, it will cause the chamber pressure switch to stay open;
which prevents the heater from turning back on; and the temperature will continue
to drop. Blocked vent can additionally cause steam to blow out of the door.
Auto-Fill Steamer: If the steamer is overlling with water and
causing the steamer to shut-off:
Ensure the steamer is • level, front to back and side to side. An un-level steamer can
cause the water in the steam chamber to collect in the front of the steamer, causing
the Over-Fill Float Ball to raise and trip the Reed Switch prematurely (every time
the steamer is turned ON). Once the Reed Switch trips, it will cause an Over-Fill
Light and Buzzer; while turning off the steamer and preventing its usage.
Ensure that both of the Water Sensors are clean. Build-up of scale or crud will •
prevent the Water Sensors from providing the appropriate control signals to the
Auto-Fill Valve, causing it to overll with water.
Ensure that the water pressure being supplied to the Auto-Fill Valve should not be •
greater than 60 psi. If water pressure is to high, then a larger volume of water will
be added to the steam chamber during the auto-ll cycle; causing the steamer to
overll with water.
SP8027-1203 Pg 2
PURPOSE REFERENCE OF MAIN COMPONENTS
Component Part # Purpose
Contactor
(3 Pole)
Transformer AT0E-2662-5 Steps-down the Supply Line Voltage to 24 -28VAC.•
Overtemp Switch
(Thermal Limit
SW3)
Control / Keypad
Board
Water Sensor
Control Board
AT0E-1587-4
12KW & Lower
AT1E-2653-3
14KW & Up
AT1E-2653-4
AT0E-3625-1
AT0E-3230-2
Provides line voltage to the Solid State Relay(s), when the contactor’s •
coil is closed by the control signal sent from the Water Control Board.
Provides line voltage to the Transformer.•
Normally closed switch that provides a safety feature to the machine •
in case the Cast Heater overheats.
If the Cast Heater • overheats, the switch will open and turn the steamer
off; while lighting the red LED Overtemp Light on the Control Panel.
The steamer will • not turn on until the temperature has dropped
enough to allow the Overtemp Switch to close again.
Human interface for steamer operations through push-buttons, •
operations, & display readouts.
Provides power to the Solid State Relay(s) (24VDC).•
Receives input from the Temperature (RTD) Sensor and displays the •
water temperature on the LED readout.
Maintains the preset HOLD temperature.•
Receives inputs from Water Sensor Probes and implements •
corresponding actions for those inputs based on the water level in the
steam chamber.
Controls the Auto-Fill Valve (• if installed) and receives inputs that
provides actions for the desired water level needs.
Teon exterior with a stainless steel center that uses the minerals •
Water Sensor
Probe
Low Water Level
Probe
High Limit
Water Level
Probe
SP8027-1203 Pg 3
AT1E-2652-1
in the water to complete the electrical circuit to the Water Control
Board.
MUST BE CLEAN TO WORK PROPERLY.•
Once the Low Water Sensor is satised, it will allow the Solid State •
Relay(s) to activate.
If the water level is below the sensor, the Water Board will activate •
the Auto-Fill Valve (if installed) lling the unit the water until the
High Limit Water Sensor is satised.
On initial chamber water ll, once the water level reaches and •
satises the Operational Water Sensor, the Water Board will keep the
Auto-Fill Valve open for 30 additional seconds..
After initial chamber water ll, when the water level drops below the •
sensor’s operational level; the Water Board will open the Auto-Fill
Valve for 30 seconds to raise the water level back above the High
Limit Water Sensor.
This process will repeat as long as the water level stays above the •
Low Water Sensor.
PURPOSE REFERENCE OF MAIN COMPONENTS
Component Part # Purpose
Auto-Fill Valve
(OPTIONAL)
Water Over-Fill
Sensor Switch
(OPTIONAL)
Control Relay #1
(AC)
Door Switch AT0A-3660-1
Chamber
Pressure Switch
AT1A-3841-1
Reed Switch:
AT0A-3519-2
Float Ball:
AT0P-3233-1
AT0E-2825-5
S#: 34769 & Up
AT0E-3617-2
S#: 34768 & Lower
AT1A-3847
Solenoid Valve that allows water to ow into the steam chamber; that •
is controlled automatically by the Water Board based on inputs from
the Water Sensor Probes.
Magnetic Reed Switch is used in conjunction with a Float Ball. If the •
water rises too high, the switch opens and turns off the steamer.
When the switch opens, the High Water Overll LED will light. The •
user will have to drain the water out and turn the steamer back ON;
otherwise, the steamer will remain shutdown.
Controls AC Volt input & output signals which provide actions from •
the Water Sensor Board and Auto-Fill Valve (if installed).
Magnetic Switch used to ensure that the door is closed and latched •
prior to generating steam
Solid State Relay(s) will • not activate if this switch is not closed
(Door Open).
Normally closed switch that allows pressure to build-up inside the •
steam chamber.
Opens when the steam chamber pressure reaches 1/2 PSI.•
Solid State Relay(S) will • not activate if this switch is not closed
(Switch Open).
Solid State Relay AT0E-2059-3
6 KW:
AT1A-3530-1
8 KW:
AT1A-3530-2
10 KW:
Cast Heater
Replacement Kit
AT1A-3530-3
12 KW:
AT1A-3530-4
14 KW:
AT1A-3530-6
17 KW:
AT1A-3530-7
Provides line voltage to the Cast Heater elements, once the Controller •
/Keypad Board sends the 24V control signal to the relay(s).
The relay(s) are only activated if the Door Switch & Chamber •
Pressure Switch are closed.
The number of Solid State Relays used, depends on the phase and •
wattage needs of the unit.
Transfers the heat, generated from the internal elements; to boil the •
water to create steam.
Cast Heater can be wired to single or 3 phase; and have a parallel, •
delta, or wye conguration.
Cast Heater must be replaced with the same wattage heater as •
specied in the model number.
SP8027-1203 Pg 4
PURPOSE REFERENCE OF MAIN COMPONENTS
Component Part # Purpose
Temperature
(RTD)
Sensor
Door Assembly AT1A-3600-1
Drain Valve AT1P-2239-1
AT0E-3626-1
ADDITIONAL COMPONENT PART NUMBERS
Component Part # Component Part #
Pilot Lamp, 24V Red AT0E-1800-2 Door Hinge (Pair) AT1H-2058-3
Fuse, 1.25A 250V AT0E-2731-2 Door Latch Assy, Ceramic Magnet AT1H-3609-1
Provides temperature input to Control/Keypad Board, which displays •
the temperature in the steam chamber based on resistance changes
from the Temperature (RTD) Sensor.
Used to maintain the preset HOLD mode temperature.•
Keeps the steam trapped inside the steam chamber to allow pressure •
to build and cycle the Chamber Pressure Switch.
Manually Open/Close valve used to drain water from the steam •
chamber.
Gasket, Door AT1G-2633-1 Door Latch Mounting Plate AT1M-3046-1
Inner Door Assembly AT1A-3647-1
SP8027-1203 Pg 5
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