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TROUBLESHOOTING (Tables 6-8, and Fig. 19)
Table 6 — Service Indicators
LAMP STATUS INDICATION CORRECTION ACTION
Check the TH1 thermistor for correct resistance.
1 Flash Faulty TH1 Sensor Check for proper connection.
Replace thermistor if necessary.
Check the TH2 thermistor for correct resistance.
2 Flashes Faulty TH2 Sensor Check for proper connection.
Replace thermistor if necessary.
Check system pressures.
3 Flashes Low Pressure Check refrigerant charge.
Check thermistors (TH1 and TH2) for correct resistance.
Check system pressures.
4 Flashes High Pressure Check refrigerant charge.
Check thermistors (TH1 and TH2) for correct resistance.
Check operating voltage.
Check electrical connections.
Check operating voltage.
Check electrical connections.
WARNING
Be sure to check for broken wires or loose cable lugs
before troubleshooting system.
OPERATION LED.
INDICATES ERROR
CLEAN FILTER INDICATOR
FLASHED AFTER 250 HOURS
OF OPERATION
POWER LED.
OFF WHEN SYSTEM IS
OPERATING AND FLASHES
WHEN SYSTEM IS IN ERROR.
(DOES NOT INDICATE ERROR CODE)
Fig. 19— Indicator Lights
5 Flashes Low Voltage
6 Flashes High Voltage