Control Condenser Fan Run - Sub-Zero 700TC-3 Service Manual

Integrated
Integrated

Control Condenser Fan Run

In all models except the 700TF/I-3, the microprocessor senses the 115 volt output supplied to both compressors. If
either compressor is running, a signal is sent to the condenser fan relay on the control board to close, supplying
power to the condenser fan. If both compressors are off, the condenser fan is off. (See Figure 3-22)
NOTE: There is only one compressor on the model 700TF/I-3. The condenser fan cycles with this single compressor,
which along with the evaporator fan, will cycle off during defrost and may also cycle off for short periods of time if
the ambient temperature is low enough.
HIGH VOLTAGE
BLACK
J5
J7
E2 E7 E10 E6
J3
J4
J1
J2
Figure 3-22. 700TC/I-3 Signal Trace Schematic (High Voltage) of Condenser Fan Operation
3
3
(700- T
(700- T
115 VOLTS
L1 NEUT
60 CYCLES
WHITE
GRAY
J6
PURPLE
CONDENSER
WHITE/RED FAN MOTOR
Power supplied to
condenser fan
motor if one or
both compressors
are running
Series
Series
ALL)
ALL)
WHITE
REFRIGERATOR
FAN SWITCH
REFRIGERATOR
OVERLOAD
PROTECTOR
FREEZER
OVERLOAD
PROTECTOR
FREEZER
FAN
SWITCHES
PURPLE
M
3-13
Electronic Control System
REFRIGERATOR
RED FAN MOTOR
M
RUNNING
CAPACITOR
(WHEN USED)
REFRIGERATOR
STARTING
COMPRESSOR
RELAY
M
RUNNING
CAPACITOR
(WHEN USED)
FREEZER
STARTING
COMPRESSOR
RELAY
M
FREEZER
RED
FAN MOTOR
M
#3758412 - Revision B - December, 2006