Wiring Diagram

SERVICE DATA SHEET
A01461105
ICE & WATER - AUTOMATIC DEFROST
SIDE BY SIDE - R134a
CAUTION
All electrical parts and wiring must be shielded from torch ame. DO NOT allow torch to touch
insulation; it will char at 200°F and ash ignite (burn) at 500°F. Excessive heat will distort the
plastic liner.
DIAGNOSTIC MODE
Activate: Press ^ and V temperature pads for up to 10 sec. simultaneously. Press + to advance
through tests.
Deactivate: Press + for up to 10 sec. Diagnostic Mode will automatically deactivate after 5 min.
of inactivity. Note: Silence alarm.
• Tests marked with “*” may not be applicable to this unit and will not be displayed in Diagnostic Mode.
• Tests displayed in diagnostic mode but not described below are for internal purposes only; advance through.
• View UI display for “on,” “off,” “CL,” “OP,” “SH,” “LO,” “HI” or numerical results of tests.
• Listen for operating sounds; feel for heat or air ow as appropriate to determine results of tests.
Test To activate test: Passing result
-- First Screen -- All LED lights on UI illuminated
-- Second Screen -- All segments on UI temperature displays illuminated
-- Third Screen -- Blank UI display, no lights illuminated, no shadowing; “-” and “+”
blinking on FF display side to show location.
28 Dispenser Paddle Press disp. paddle “on” on UI when depressed; “off” when released
46 Humidity Sensor Activates
automatically
“OP” if open, “SH” if short
AC Heater System: Displays %RH
DC Heater System: “HI” – heater should be on
“Lo” – heater should be off
%RH is displayed when humidity is between “Lo” and “HI”
values; heater could be on or off.
47* Dispenser
Pocket Heater
Press set AC Heater System: “--” ; test not available
DC Heater System: heater on when “on”, off when “off”
1* Standard
Compressor and
Condenser Fan
Press set Compressor and Condenser Fan running when “on”; stopped
when “off”
2 Defrost Heater Press set Defrost limit switch must be closed; verify “CL” in test 26.
Feel for heat from defrost heater when “on”.
If “OP” in test 26, heater will not activate.
8 Water Valve
(Dispenser)
Press set Be prepared to collect water at dispenser.
Water dispenses when “on”; stops when “off”
10 Auger Motor Press set FZ door must be closed.
Motor running when “on”; motor stopped when “off”
11 Cube/Crush
Solenoid
Press set Do not leave solenoid in activated state.
Solenoid activated when “on”; deactivated when “off”
12* VCC Condenser
Fan
Press set Fan running when “on”; stopped when “off”
38* VCC Compressor Press set Compressor running when “on”; stopped when “off”
13 FF Light
(LED Models)
Press set FF Lights on when "on"; off when "off"
15 Evaporator Fan Press set Press to toggle between "Off", "LO", and "HI". A current sen-
sor reading is ashed (units are not mA). Off reading should
be around 1. "LO" speed reading should settle down around
10. "HI" speed reading should settle down around 53.
20 FZ Light
(LED Models)
Press set FZ Lights on when "on"; off when "off"
22 Damper Press set With inspection mirror, observe damper open when “OP”;
closed when “CL”
36 Ice Chute Door Depress ice chute
door or press set
“OP” on UI when manually opened; “CL” when closed. Or,
using “set”, “OP” on UI when fully opened or "CL" when fully
closed by the motor.
23 FF Door Open/close FF door “CL” on UI when door closed; “OP” when open
24 FZ Door Open/close FZ door “CL” on UI when door closed; “OP” when open
26 Defrost Limit
Switch
Activates
automatically
“CL” on UI when closed; “OP” when open
29 FF Thermistor Activates
automatically
UI shows temperature sensed by FF thermistor; pass if within
10°F of temperature measured with gauge at mid-level FF
thermistor location.
“OP-” if open; “SH-” if short
30 FZ Thermistor Activates
automatically
UI shows temperature sensed by FZ thermistor; pass if within 10°F
of temperature measured with gage at FZ thermistor location.
“OP” if open; “SH” if short
33 Ambient Thermis-
tor @ Main Board
Activates
automatically
UI shows temperature sensed at main board; pass if within +20°F/-
10°F of temperature measured with gauge at main board location.
“OP” if open; “SH” if short
34 Ambient Therm-
istor @ UI
Activates
automatically
UI shows temperature sensed at UI; pass if within +20°F/-
10°F of temperature measured with gauge at UI location.
“OP” if open; “SH” if short
39 Evaporator
Thermistor
Activates
automatically
UI shows temperature sensed at main board; pass if within +20°F/
-10°F of temperature measured with gauge at evaporator
thermistor location. “OP” if open; “SH” if short
0- Firmware
Parameters
Press set Displays digit sequence; record
2- Main Board
Firmware
Press set Displays digit sequence; record
4- UI Firmware Press set Displays digit sequence; record
ERROR CODES SPECIAL MODES
Display
Interpretation Mode
Display Activate/Deactivate
(press for up to 10 sec. simultaneously)
FZ FF FZ FF
-- OP Open FF
mid-level thermistor
Manual
Defrost
d F + and -/same to deactivate
OP -- Open FZ thermistor Display/
Showroom
77 77 ^ and -/set
Sabbath Sb Sb V and +/same to deactivate
-- SH Shorted FF
mid-level thermistor
Diagnostic No FF or FZ display,
all UI LEDs on.
^ and V/+ to deactivate
Notes:
• Always check for pin back-outs, pinched or damaged wires before
replacing components.
• Determine whether failure is caused by the component, main control
board or wiring. Contact TID before replacing main control board.
• Refer to Service Manual for additional information.
SH -- Shorted FZ thermistor
SY CF
UI to Main Control
Board communication
failure; on start up
SY CE UI Main Control Board
communication error;
after a period in operation
SY EF Evaporator fan failure
IMPORTANT: PLEASE RETURN THIS SHEET TO ITS ORIGINAL LOCATION
IMPORTANT SAFETY NOTE
The information provided herein is designed to assist qualied repair personnel only. Untrained persons
should not attempt to make repairs due to the possibility of electrical shock. Disconnect power cord before
servicing this appliance.
IMPORTANT
If any green grounding wires are removed during servicing, they must be returned to their original position
and properly secured.
PERFORMANCE DATA NO LOAD & NO DOOR OPENINGS AT
0° F FREEZER & 37° F FRESH FOOD (2500 ++ ISO)
Type A with Run/
Start Capacitor
65°F (18°C) Ambient 90°F (32°C) Ambient
Variable Speed Standard Variable Speed Standard
Operating Time 74 to 84% 32 to 40% 100% 55 to 65%
Freezer
Temperature
-2° to 2° F
-19° to -17° C
0° to 4° F
-18° to -16° C
-1° to 3° F
-18° to -16° C
-1° to 3° F
-18° to -16° C
Refrigerator
Temperature
34° to 39° F
1° to 4° C
34° to 39° F
1° to 4° C
34° to 39° F
1° to 4° C
34° to 39° F
1° to 4° C
Low Side Pres-
sure (cut-in)
5 to 12 psig
43 to 83 kPa
5 to 12 psig
43 to 83 kPa
N/A
5 to 12 psig
43 to 83 kPa
Low Side Pressure
(cut-out)
-2 to 2 psig
-14 to 14 kPa
-2 to 2 psig
-14 to 14 kPa
-2 to 2 psig
-14 to 14 kPa
-2 to 2 psig
-14 to 14 kPa
High Side Pres-
sure
(last
1
/
3
cycle)
90 to 105 psig
621 to 724 kPa
90 to 115 psig
621 to 793 kPa
120 to 135
psig 827 to
931 kPa
130 to 155 psig
896 to 1069 kPa
Wattage
(last
1
/
3
cycle)
50 to 60 90 to 130 60 to 70 100 to 140
Amps (running) 0.5 to 0.9 0.7 to 1.1 0.6 to 1.0 0.8 to 1.2
Base Voltage 115 vac (127 vac max)
DEFROST SPECIFICATIONS
Cabinet Size
Thermal Cut-out Heater Defrost Thermistor
Termination
Cut-in Cut-out Watts Ohms Cut-out
23’ CD, 26’ SD 110° F (43.3° C) 135° F (52.2° C) 450 30 48° F (8° C)
CONDENSER FAN MOTOR
Watts RPM Amps
3.1 1100 CW Opposite Shaft 0.03 Running
ICE MAKER DIAGNOSTIC MODE
Activate:
Press FZ+ and FF+ temperature pads for up to 10 sec. simultaneously.
Press FF+ or - to move forward or backward through tests.
Deactivate:
Press FF+ for up to 10 sec. IM Diagnostic Mode will automatically deactivate after 5
min. of inactivity.
NOTE: Silence alarm.
Test To activate test Passing Result
52C
Ice Maker
Thermistor
Activates automatically
FZ display shows temperature sensed by Ice
Maker Thermistor.
“OP” if open; “SH” if short
55C
Water
Valve
Press Power On-Off
Remove ice tray to collect water into a measuring
container to measure water ll. If collecting water
into ice tray, rst perform test 63C to empty ice tray.
58C
Ice Level
Sensor
Activates automatically
Remove ice bucket. Allow bail arm to drop freely. Pass
if no alarm when tray returns to “home” position.
Hold bail arm up. Pass if alarm sounds when tray
returns to “home” position.
This test runs continuously until another test is selected.
63C Twist Tray Press Power On-Off
Remove ice bucket.
FZ display shows “1” and “GOOD”.
Replace Inverter
→ Check at the connector
from main control into
the inverter (typically
BLK and RED wires)
Is Inverter receiving
10-15 VAC
and 1-5 VDC from
Main Control?
→ Check at Main Control
Board
(BLK/WHT and RED/BLK wires)
Is Main Control
sending 10-15 VAC
and 1-5 VDC to
Inverter?
no
→ Check at the connector from
the service cord into the
inverter (typically PUR and
WHT wires.)
Is Inverter receiving 115
VAC from power supply?
yes
• Check voltage supply.
• Check and repair
service cord wiring
and connections.
no
Identify and repair
damaged wires or poor
connections between
Main Control and
Inverter
yes
→ Remove inverter box
from the compressor
and check resistance
across compressor
winding pairs as shown.
Is resistance across
all winding pairs
equal?
yes
Replace Compressor
no
→ Check connections
from Inverter to
Compressor
Are connections
from Inverter to
Compressor intact?
yes
yes
Identify and repair
damaged wires or poor
connections between
Inverter and Compressor.
no
VCC Resistance Check
Check resistance between terminals
1 and 2, 2 and 3, 3 and 1.
If all resistances are equal,
compressor is operative.
Replace Main Control
no