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Troubleshooting Guides
Integrated (
Integrated (
700-
700-
2) Series
2) Series
8-4
#
3756780
- Revision D - July, 2005
EC
TEST / ACTION
20
21
22
23
24
80
A.
With cold evap. (< 10°F), initiate Manual Defrost, then initiate Diagnostic Mode (press UNIT ON/OFF key every 20
seconds to keep in Diagnostic Mode) and observe evap. temp. If temp. exceeds 45°F and defrost lasts longer then
5 minutes (longer then 10 minutes in 700TF/I-2V), error code is false. Clear error code. If error code is not false:
1.
Check continuity of Grey/White wire from defrost heater to J4-4 on control board. Reconnect / repair
Grey/White wire.
2.
While in defrost, check for 115V AC at E2 on control board. If no voltage, replace board.
3.
Check continuity of Blue wire from defrost terminator to E2 on control board. Reconnect / repair Blue wire.
4.
Check resistance of defrost heater (see wire diagram for proper resistance). Replace heater if defective.
5.
Check electrical connections and operation of defrost terminator (Cut-in 30°F/Cut-out 70°F). Reconnect /
repair or replace terminator.
6.
Reference wiring diagram to identify components in same White wire circuit as defrost heater. Check all White
wire electrical connections and continuity from defrost heater to J7-8 on control board.
A.
With cold evap. (< 10°F), initiate Manual Defrost, then initiate Diagnostic Mode (press UNIT ON/OFF key every 20
seconds to keep in Diagnostic Mode) and observe evap. temp. If temp. does not exceed 105°F, error code is false.
Clear error code. If error code is not false:
1.
Check Blue wire connection at control board (E2). If connected to wrong pin, connect correctly.
2.
Check Grey/White wire connection at control board (J4-4). if connected wrong or bad connection, reconnect /
repair.
3.
Check for proper mounting & location of evap. thermistor, defrost heater & terminator. Remount correctly.
4.
Check for electrical short of Blue wire to another circuit. Repair Blue wire &/or electrical connections.
5.
Check operation of defrost terminator (Cut-in 30°F / Cut-out 70°F). Replace if defective.
A.
With cold evap. (< 10°F), initiate Manual Defrost. If compressor starts 5 minutes (10 minutes in 700TF/I-2V) after
defrost is initiated, check Grey/White wire and continuity from defrost heater to J4-4 on control board. Reconnect /
repair Grey/White wire.
A.
With cold evap. (< 10°F), initiate Manual Defrost. If compressor starts 5 minutes (10 minutes in 700TF/I-2V) after
defrost is initiated, check Grey/White wire connections and continuity from defrost heater to J4-4 on control board.
Reconnect / repair Grey/White wire.
B.
Check for proper mounting and location of evap. thermistor, defrost heater & terminator. Remount correctly.
C. Check Blue wire connection at control board (E2). If connected to wrong pin, connect correctly.
D
Check for electrical short of Blue wire to another circuit. Repair Blue wire &/or electrical connections.
A.
With cold evap. (< 10°F), initiate Manual Defrost, then initiate Diagnostic Mode (press UNIT ON/OFF key every 20
seconds to keep in Diagnostic Mode) and observe evap. temp. If temp. exceeds 45°F, error code is false. Clear
error code. If error code is not false:
1.
Check Blue wire connection at control board (E2). If connected to wrong pin, connect correctly.
2.
Verify proper location of Grey/White wire at control board (J4-4). if connected wrong or bad connection, recon-
nect / repair.
3.
Check for proper mounting & location of evap. thermistor, defrost heater & terminator. Remount correctly.
A.
If unit is NOT experiencing cooling problems, clear error code.
B.
If unit is experiencing cooling problems:
1.
Check for 100 - 120 Volts AC to unit / electronic control board. If below 100 Volts AC, instruct customer to con-
tact Electrician or power company. If proper voltage, see “2” below.
2.
Check for 100 - 120 Volts AC to VS Compressor Controller.
a.
If below 100 Volts AC, check wiring and electrical connections between electronic control board and VS
Compressor controller. If wiring and electrical connections are good, replace electronic control board.
b.
If proper voltage, initiate Manual Component Activation Mode to energize compressor.
1.
If compressor will not start, replace VS Compressor Controller.
2.
If compressor starts, but will not stay running, check for restrictions in sealed system.
3.
in left column under problems A & B in General
ERROR CODE TROUBLESHOOTING GUIDE
NOTE:
Error Codes 80 to 88 apply to the model 700TF/I-2V only.
NOTE:
After repairs, always clear Error Codes by pressing Bell ON/OFF key for 15 seconds.
