Electronic Control System
Integrated
Integrated
(700-
(700-
3
3
T
T
ALL)
ALL)
Series
Series
3-16
#3758412 - Revision B - December, 2006
J6
J5
J3
E2 E7 E10 E6
J2
J1
J7
J4
HIGH VOLTAGE
FREEZER
OVERLOAD
PROTECTOR
NEUT
115 VOLTS
60 CYCLES
L1
REFRIGERATOR
OVERLOAD
PROTECTOR
FREEZER
FAN
SWITCHES
FREEZER
COMPRESSOR
STARTING
RELAY
FREEZER
FAN MOTOR
RUNNING
CAPACITOR
REFRIGERATOR
COMPRESSOR
REFRIGERATOR
FAN SWITCH
REFRIGERATOR
FAN MOTOR
WHITE
GRAY
BLACK
PURPLE
WHITE
PURPLE
RED
RED
STARTING
RELAY
RUNNING
CAPACITOR
(WHEN USED)
(WHEN USED)
M
M
M
M
M
Figure 3-25. 700TC/I-3 Signal Trace Schematic (High Voltage) of Compressor Electrical System
Figure 3-26. “SERVICE”, “40” or “50” and “EC” Flashing = Several Excessive Compressor Run Periods
UNIT
ICE
REFRIGERATOR
ON/OFF
ON/OFF
ON/OFF
WARMER
COLDER
FREEZER
WARMER
COLDER
SERVICE
length of compressor
run time is monitored
by microprocessor.
Monitor Compressor Run Duration, Displays If Service is Needed
In all models except the 700TF/I-3, the microprocessor observes the changing state of the compressor relays to
determine the length of compressor run time (See Figure 3-25). If a compressor runs 100% (Fre = 6 hours / Ref = 4
hours), an error code is logged (EC 40 / EC 50, respectively), and defrost is initiated, but SERVICE will not flash.
If several 100% run periods occur, and the compartment temperature does not fall to at least the set point / low off-
set temperature average (and the door is not opened during the last run period), then SERVICE will flash along with
the error code (See Figure 3-26).
NOTE:
To clear a flashing SERVICE and EC, the problem must be corrected, then switch the unit off then back on
and/or press the Bell ON/OFF key for 15 seconds. Failure to clear an error code will cause SERVICE to display
constant once Diagnostic Mode is initiated.
NOTE:
If the unit is ever switched OFF then back ON, the compressor will not energize for at least 3 minutes. This
3 minute minimum OFF time is used to protect the compressor and its electricals.