Natural Choice ION pure refreshment Operating manual

NCC7222-07 R2- 111207
TECHNICAL SERVICE MANUAL

•CAUTION: Unplug from electrical outlet before servicing
•IMPORTANT:Torx 20 screwdriver required
•Squeeze sides at
arrows and lift
•Loosen 2 screws at top, rear
•Pull panel up at rear
•Then roll to right front corner
•Remove 3 screws left side
•Slide back 1 inch
•Tilt panel down to remove
Remove Faucet Cover Remove Top Panel Remove Left Side Panel
NCC7222-07 R2- 111207
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Opening the Appliance

NCC7222-07 R2- 111207
Control Board
Front Panel Assembly
Filter Access
Compressor Hot Tank
LED/
SleepMode
Sensor
Touch Panel
Faucet
Power Supply Ice Bank
Major Components Service View
2
LED1 LED2
Sleep
Mode
Sensor

•Uses a 20’ length of 1/4” OD Water
Coil inside a Tank (called Ice Bank)
filled with water and ice.
•No reservoir of drinking water.
•3” thick slab of ice is formed on left
side of Ice Bank.
•Ice Bank Pump circulates water in the
Ice Bank, chilling the drinking water
inside the Water Coil.
•Ice Bank Pump is activated for
1minute, every time Cold or
Sparkling water is dispensed.
•Ice Bank Pump comes on automatically
for 1 minute, every 10 minutes.
•Level Sensor at front of Ice Bank
automatically fills and maintains
water level inside Ice Bank.
•Thermistor measures temperature inside
Ice Bank within 0.5 degree F.
•Separate valve used to fill Ice Bank
(Part#: 6519)
InstaChill™Cooling System
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3
Fan
Compressor
Condensor
Ice Bank
Evaporator
Water Coil

InstaChill™Cooling System
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4
Inlet to Ice
Bank from Fill
Valve
Inlet to Ice Bank
from Filter
Stainless Steel Water Coil
Alternate Location
for Cold Thermistor
Cold Thermistor
Evaporator
Level Sensor
Ice Bank Pump
Tee to Hot or Ambient
Water Valve
Model 901
Cold and Ambient
Model 902
Cold and Hot

InstaChill™Cooling System
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5
Model 904
Cold, Hot and Sparkling
Model 905
Cold, Hot and Ambient
Model 903
Cold and Sparkling

The Water pathway inside the ION is sealed and pressurized
in 1/4” OD tubing (about 23’ total inside the appliance).
Tap Water supply tubing connects directly at the rear of the
appliance to an Inlet Valve.
After the Inlet Valve, the water is directed to the Filter.
After the Filter,the Water travels up to the Ice Bank
Assembly,where it is either chilled inside a Stainless Steel
water coil, or bypasses to Ambient, Sparkling, or Hot
Water tubing.
After the Ice Bank, water is directed to Dispensing Valves at
the outlet of the appliance for Cold, Ambient, Sparkling,
and Hot Water.
KEY LEARNING - when you press one of the icons on the
Touch Panel, you are opening both the Inlet Valve and one
of the Dispensing Valves. You will always hear TWO valves
opening and TWO valves closing, in quick succession.
This double click is important when troubleshooting the
appliance and finding a valve which may not be opening
or getting electrical current to open.
Water Pathway
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Inlet Valve
Ice Bank
Fill Valve
Inlet to Ice Bank
from Fill Valve
Inlet to Water
Coil from Filter
Faucet
Dispensing
Valves

FUNCTION – Water from Filter enters Ice Bank Assembly,
but is diverted with Tee fitting and bypasses the Ice Bank
Water Coil.
Blue Water Tubing from Ice Bank Assembly travels to Hot
Water Valve, attached to Hot Tank.
Hot Water tank is not pressurized, but extremely dangerous
to service when filled with Hot Water.To cool, turn switch at
rear of appliance to OFF.Then dispense water from using
Hot Water icon on Touch Panel until water is cool. Then,
water can be drained from Hot Tank by removing
1/4” plug at bottom of Hot Tank elbow fitting.
MANUAL FILL – On first STARTUP only, the software will
force you to make sure the Hot Tank is filled. On every
subsequent STARTUP, make sure the ON/OFF Switch at
rear of appliance is in OFF position before connecting
electrical power.
TRANSPORTATION – It is not necessaryto empty the
Hot Tank before transport, except in temperatures below
freezing. The only outlet for water is through the Faucet. The
Hot Tank contains about 4 lbs of water and can be emptied
to make the appliance lighter to carry.
RapidHot™Water System
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Hot Valve
Outlet Tube
Vent Tube
Drain Plug
Filtered Water
Inlet to Hot Tank

Revision Level Date Notes/Changes
A July 30, 2006 Production Release.
SleepMode default is OFF
Filter Settings at 1,500 gallons and 12 months
B August 13, 2006 Changed Compressor cycle times
C October 27, 2006 Increased Hot Temperature settings
D December 10, 2006 Minor coding change
E April 15, 2007 Changed Ice Bank Pump ON time from 30 seconds to 60 seconds
SleepMode default is ON
F May 31, 2007 Changed Level Sensor setting.
G not implemented
H June 6, 2007 Corrected Filter Reset button to change LED’s green
Filter Monitor Settings – default OFF
JJune 25, 2007 Compressor Max ON and REST times added
Added Model 900 (all dip switches DOWN)
Added Dispense Error code for 2 minute dispense and 12 times/minute
Added Compressor/Fan fail check … if temp not lower after 1 hour,then LED signal error
K July 29, 2007 Changed Code to new processor
L August 24, 2007 Corrected Compressor timing loops.
ION Software
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WHITE
TOUCH PANEL
-PIN CONNECTOR
BLACK
HOT TANK
TEMP SENSOR (TM3)
PART # 1785
DISPLAY BOARD
RIBBON CABLE
6
LEDS (2)
6
-CONDUCTOR
FILTER RESET SWITCH
HIGH
VOLTAGE
AREA
SEE DATA PLATE FOR
INPUT SPECFICATION
GROUND
L1
24 VDC OUT
AC LINE
VOLTAGE IN
PIN 4 = RED
PIN 1 = BLACK
(YELLOW)
OVERLOAD
24 VDC OUT
(BLUE)
PTC RELAY
POWER SUPPLY
24 VDC IN (J1)
DIP SWITCHDIP SWITCH
PHOTO SENSOR
BLUE FAUCET LED
100-240 VAC IN ICE BANK
TEMP SENSOR (TM1)
GROUNDGROUND
SCREWSCREW
10-CONDUCTOR
RIBBON CABLE
TO J21
ICE BANK
LEVEL SENSOR (TM5)
ELECTRICAL SCHEMATIC
Natural Choice Corporation Rockford, IL 61109 phone [phone] www.naturalchoicewater.com All Rights Reserved, Natural Choice Corp.
OPTIONAL INPUT
(UNUSED)
PIN 3 = RED PIN 1 = WHITE
TO UNIT BEFORE SERVICE.
DANGER-RISK OFDEATH
WARNING-HIGH VOLTAGE ON
ALWAYS UNPLUG POWER SUPPLY
MAIN CONTROL BOARD.
OPTIONAL INPUT
(UNUSED)
INLET
VALVE
#6518
ICEBANK
FILL VALVE
#6519
PIN 3 - WHITE
PIN 2 + RED
PIN 1
PIN 3 -BLACK
PIN 2
PIN 1 + RED
COMPRESSOR
FAN
HEATER
H2O
REF
COMP
ICE BANK PUMP
RELAY (K3)
FUSE -ICE BANK
PUMP (0.5 AMP)
PIN 3 - WHITE
PIN 2
PIN 1 + RED
PIN 3
PIN 2 - WHITE
PIN 1 + RED
PIN 3
PIN 2 - WHITE
PIN 1 + RED
PIN 3
PIN 2 - WHITE
PIN 1 + RED
ICE
BANK
PUMP
PIN 3 = BLACK
PIN 2 = WHITE
POWER INLET
IEC SOCKET
GROUNDGROUND
SCREWSCREW
NEUTRAL
Model Valves
Touch Panel
Location DIP Setting
901
Cold #6516 C C
Ambient #6516 D D
902 Cold #6516 C C
Hot#6517 D D
903 Cold #6516 C C
Sparkling #6516 D D
904 Cold #6516 C C
Hot#6517 D D
Sparkling #6516 B B
905 Cold #6516 C C
Hot#6517 D D
Ambient #6516 B B
Circuit Board
Location
B
C
D
PIN 3
PIN 2 - WHITE
PIN 1 + RED
HOT #6517
COLD #6516
SPARKLING/AMBIENT #6516
AD
C
B
DIP chart reference - 0is DOWN and 1 is UP
DIP positions 4, 5, and 6 are special function
contact factory for more information
DIP positions 1, 2, and 3 control model setting
PART # 1784
CONTROL BOARD
001000
110000
101000
010000
100000
SPARKLING/AMBIENT #6516
24 Volt DC
Components
24 Volt DC
Components
(rev1 - for models produced after April 15)
NCC7222-07 R2- 111207
Wiring Diagram
9

Problem:
Water Dispenses from Cold or Sparkling Valve, but Water not Cold page 11
No Water Dispenses From Cold or Sparkling Valve page 12
Water dispenses from Hot Valve, but water not Hot page 13
No Water dispenses from Hot Valve page 14
Low or No Water Flow page 15
Blue LED not ON page 16
Blinking RED lights (both together, not alternating) page 17
Steady Orange lights (never goes to blinking Orange lights) page 18
Water Leak page 19
Steady RED lights – Filter Change required. page 20
When pressing Filter Reset button, does not reset RED lights to GREEN.
Troubleshooting Guide
NCC7222-07 R2- 111207
10

Problem: Water Dispenses from Cold or Sparkling Valve, but Water not Cold
Troubleshooting Chart
NCC7222-07 R2- 111207
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Cause Action
1. ION has been in SleepMode (with compressor off) for
weekend or long holiday.
1. Allow ice to build over 3-4 hour time period. Optionally,
program SleepMode to be OFF (Ice Bank to be maintained
24 hours per day).
2. ION is constantly in SleepMode
-is cooler in room with low level lighting?
-is Blue LED ON or OFF?
2. If Blue LED is OFF, this indicates ION is in SleepMode.
To lockout ION from SleepMode, see programming section in
Owners Manual.
3. ION may be plugged into outlet controlled by light switch. 3. Change Outlet and retest.
4. Is Fan operating? 4. Check wiring at Control Board.
5. Is Compressor Running? 5. Check wiring at Control Board
6. Freon Leak. 6. If no ice after 3 hours of Compressor and Fan operating,
call factory.
7. Software bug 7. Software Rev Level J and K have higher than normal incidence
of compressor malfunction – either freeze-up or no ice condition.
Call factory for replacement of product or new Circuit Board.

Problem: No Water Dispenses From Cold or Sparkling Valve
IMPORTANT – Do you hear both Inlet Valve and Cold Valve “double-click” when opening and closing?
Inlet Valve must open to allow water into ION. Dispensing Valve then allows water out of appliance.
Therefore, when dispensing water, you will hear two valves clicking open and closed in quick
succession. The clicking indicates the plunger is moving up and down and that the valve has electrical
current. Place your finger on the back of the appliance where Inlet Valve is located and you can feel it
click open and closed. Place your finger on Dispensing valve and you can also hear it click open and
closed. A dead valve (no electrical current) is indicated when you cannot feel the plunger moving
up inside.
Troubleshooting Guide
NCC7222-07 R2- 111207
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Cause Action
1. Dead Valve - No electrical current. 1. Check Touch Panel connector to Display Board,
behind Front Panel.
Check valve wiring on Control Board.
Check DIP Switch setting for correct ION model
(see wiring diagram).
2. Valves are clicking, indicating electrical current is present. 2. Double-check Water Supply tubing, shutoff valves, and undersink
connection.
Check inside Ice Bank for frozen Ice Bank … thaw and set
DIP 4 to UP position. Or contact factory for latest software
revision level.

Troubleshooting Guide
NCC7222-07 R2- 111207
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Problem: Water dispenses from Hot Valve, but water not Hot
Cause Action
1. ON/OFF switch at back of ION 1. Turn to ON position.
2. Wiring and connectors at Control Board 2. Check for continuity (not voltage) through the hot tank connector
and wiring harness at Control Board (with ION unplugged and
Switch in ON position).
3. Thermal Overload in Hot Tank Assembly has been tripped
(from dry-firing hot tank).
3. Replace Thermal Overload (this is veryrare as the software does
not allow temperature to rise quickly inside hot tank). Instead you
will get an LED error message reminding you to fill the hot tank
and check the thermistor.
4. Faulty Control Board. 4. Replace Control Board.

Troubleshooting Guide
NCC7222-07 R2- 111207
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Problem: No Water dispenses from Hot Valve
Cause Action
1. Are customers pressing BOTH Hot and Safety button
at same time?
1. Refer to Instruction Label inside filter door of appliance
and notify customer.
2. Do you hear both Inlet and Dispensing Valve clicking
open and closed?.
2. Do you hear both Inlet and Dispensing Valve clicking
open and closed?
2. Check for dead valve or water supply problem.
Check DIP switches on Control Board (see wiring diagram).
Check Valve Wiring on Control Board (see wiring diagram).

Troubleshooting Guide
NCC7222-07 R2- 111207
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Cause Action
1. Using 1/4” water supply tubing may restrict water flow, depend-
ing on available water pressure inside building.
1. Change to 3/8” water supply tubing.
2. Inlet Valve is quick connect fitting that requires cleanly cut 1/4”
water supply tubing.
2. Check water supply tubing and cut cleanly with razor knife.
3. Is copper tubing used at Inlet Valve? 3. Do not use copper tubing to connect to ION appliance … use
a1/4” compression union fitting and only connect to ION with
plastic tubing.
Problem: Low or No Water Flow
IMPORTANT – Keep in mind that inside the ION, there is a 1 micron carbon filter and 23’ of 1/4” tubing (the Water
Coil is 20’ in length). Plan ahead for adequate water pressure and flow rate into the ION.

Troubleshooting Guide
NCC7222-07 R2- 111207
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Cause Action
1. Loose connection behind Front Panel at Display Board 1. Reconnect or replace as needed.
2. ION in SleepMode 2. In very low light, after 5 minutes, ION goes into SleepMode
(default setting) unless programmed OFF (see Owners Manual,
programming section).
Problem: Blue LED not ON
IMPORTANT – SleepMode is an energy saving feature that is programmed into the Control Board. A photo sensor
behind the LED3 on Front Panel allows software to turn the compressor OFF when room is dark.
Check the location carefully… if room light is turned ON and OFF frequently during the day, this will be a problem for
the cooling system. See Owners Manual, programming section, and program the SleepMode feature to be OFF.
When SleepMode is ON, compressor is OFF after room is dark for 5 minutes; hot tank drops to 135F.When any
button is pressed, OR in light room after 5 minutes, SleepMode cycle ends, and hot tank and compressor are both
ON as needed to reach temperature.

Troubleshooting Guide
NCC7222-07 R2- 111207
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Cause Action
1. Level Sensor Timeout 1. Unplug ION and reconnect to electrical supply.
Continue as need until Ice Bank is filled and LED1 and LED2 are
both Green and Steady (with Blue LED under the faucet). This
indicates Normal Operation.
Problem: Blinking RED lights (both together, not alternating)
IMPORTANT – Ice Bank automatically fills by using a Level Sensor. To prevent endless water flow from failed Level
Sensor, software only allows the Ice Bank to fill for 5 minutes on STARTUP. Once the ION has passed STARTUP, the Ice
Bank is limited to a fill time of 2 minutes. To fill the Ice Bank, you will need to unplug and reconnect the ION to
electrical outlet until the Ice Bank is filled.

Troubleshooting Guide
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Cause Action
1. Are Cold and Hot sensors (thermistors) in the correct position? 1. Check wiring diagram, remove, and reinsert. CAUTION - unplug
ION before any contact with Control Board.
2. On Models produced after September 1 … can you hear
asingle initialization beep when ION is first plugged in?
2. If YES, then double check sensor wires and replace sensors
as needed.
If NO, then replace Control Board – programming error or defect
on Control Board (perhaps, shipping damage) is preventing
Control Board from initialization.
Problem: Steady Orange lights (never goes to blinking Orange lights)
IMPORTANT – on software rev level prior to L (Sept. 2007), a hot or cold sensor unplugged (or not completely
connected) will cause this condition. During shipping, the sensor connections can become unstable and may require
careful removal (straight back) and reinsertion onto the Control Board (see wiring diagram). CAUTION – unplug ION
before any contact with Control Board.

Troubleshooting Guide
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Cause Action
1. Filter not completely rotated into correct position. 1. Some filters (produced June 2007) have been spinwelded
incorrectly and can only be rotated clockwise into ION to a
certain point. If you want these filters replaced, contact the factory.
2. Ice Bank leak 2. Level inside Ice Bank is checked by software every 24 hours and
refilled (2 minute limit)… a small pinhole leak inside Ice Bank can
cause leak. Contact factoryfor replacement.
3. Tubing, Fitting, or Valve Leak 3. Check all fittings, tubing, and valves, and repair as needed.
Problem: Water Leak
IMPORTANT – the ION uses an Inlet Valve to allow water to enter the appliance. Only when the customer presses
Touch Panel to dispense water – or when Ice Bank automatically fills – does the Inlet Valve open to allow water to enter
the appliance.
On units with “Bypass” feature, the Inlet Valve is bypassed to allow for Filter Water from the ION to be routed out the
back of the appliance and over to a coffee machine. This option provide for continuous water flow (bypassing the Inlet
Valve) and is not recommended for installations that want to maintain the maximum level of leak prevention.