Sub-Zero INTEGRATED Series Service Manual page 83

Troubleshooting
PROBLEM
(Continued)
H. Warm Freezer Temperatures
without "SERVICE" Flashing
Pointers:
1. "Sr" appears during Diagnostic
Mode, see:
• Unit in Showroom Mode
2. Evap Temp -20°F (-29°C) or
lower, see:
• Door ajar
• Lights ON w/door closed
• Evaporator fan fault
• Compartment thermistor mis-
read
• Evaporator heavily frosted
• Sealed system fault: leak or
partial restriction
3. Evap Temp between -19°F
(-28°C) and 0°F (-17°C), see:
• Warm food load
• High room ambient
• Door ajar
• Condenser Air Flow
• Compartment thermistor mis-
read
• Sealed system fault: leak
4. Evaporator Temp 0°F (-17°C)
or higher, see:
• Power to compressor fault
• Sealed system Fault: leak,
restriction, inefficient compres-
sor
NOTE: "Pointers" do not apply to
cabinet initial pulldown from
ambient temperatures.
NOTE: To clear non-flashing
SERVICE indicator after repairs,
press door ajar alarm bell
ON/OFF key for 15 seconds.
#7015817 - Revision A - January, 2010
INTEGRA TED
INTEGRA TED
(736 T (736 T
POSSIBLE CAUSE
Evaporator Fan Fault
a. Top hinge cover missing, not depress-
ing fan switch
b. Fan blade obstructed or out of position
c. Faulty fan switch
(NOTE: A compressor must be running)
d. Evaporator. fan motor disconnected
e. Evaporator fan motor defective
(NOTE: Compressor must be running)
Compartment Thermistor Misread
Evaporator Heavily Frosted
a. Door or drawer ajar
b. Evaporator fan fault
c. Compartment thermistor misread
d. Defrost heater disconnected or faulty
e. Defrost terminator disconnected or
faulty.
f. Defrost sense line disconnected.
g. No power from control board to defrost
circuit
Power to Compressor Fault
NOTE: For 736TFI, see Error Code
Troubleshooting Guide
Sealed System Fault
• Sealed System Leak
• Sealed System Restriction
• Inefficient Compressor
8-10
SERIES
SERIES
all SWS #2970000) all SWS #2970000)
TEST / ACTION
a. Replace hinge cover.
b. Move obstruction or reposition blade.
c. Check for AC line voltage to fan switch,
depress fan switch and check for AC line
voltage from fan switch. Replace switch if
defective. (NOTE:
es in the drawer area)
d. Check electrical connections of motor.
Reconnect / repair bad connections.
e. Check for AC line voltage at fan motor with
fan switch depressed. Replace motor if
defective.
Check resistance of freezer compartment
thermistor for 30,000 to 33,000 ohms at
32°F (0°C). Replace if defective.
a. See Door or Drawer Ajar on previous page.
b. See Evaporator Fan Fault above.
c. See Compartment Thermistor Misread
above.
d. Check electrical connections. Reconnect /
repair bad connections. Check resistance of
heater, 30-38 Ohms, replace if defective.
e. Check electrical connections, Reconnect /
repair bad connections or replace terminator
if defective.
f. Manually initiate defrost by pressing ICE key
for 10 seconds. If defrost lasts exactly 5
minutes, check all connections of gray/white
wire from terminator to J4-4 on control
board. Reconnect / repair bad connections.
g. Manually initiate defrost by pressing ICE key
for 10 seconds. Check for AC line voltage at
E2 on control board. Replace control board
if defective.
Check for AC line voltage at E7 on control
board. Replace control board if defective.
See Sealed System Troubleshooting Guide
there are two fan switch-