12
TROUBLESHOOTING (Tables 6-8, and Fig. 17)
Table 6 Service Indicators
Be sure to check for broken wires or loose cable lugs
before troubleshooting system.
LAMP STATUS
INDICATION
CORRECTION ACTION
1 Flash
Faulty TH1 Sensor
Check the TH1 thermistor for correct resistance.
Check for proper connection.
Replace thermistor if necessary.
2 Flashes
Faulty TH2 Sensor
Check the TH2 thermistor for correct resistance.
Check for proper connection.
Replace thermistor if necessary.
3 Flashes
Low Pressure
Check system pressures.
Check refrigerant charge.
Check thermistors (TH1 and TH2) for correct resistance.
4 Flashes
High Pressure
Check system pressures.
Check refrigerant charge.
Check thermistors (TH1 and TH2) for correct resistance.
5 Flashes
Low Voltage
Check operating voltage.
Check electrical connections.
6 Flashes
High Voltage
Check operating voltage.
Check electrical connections.
VAC
CLEAN FILTER INDICATOR.
FLASHES AFTER 250 HOURS
OF OPERATION
OPERATION LED.
INDICATES ERROR
POWER LED.
OFF WHEN SYSTEM IS
OPERATING AND FLASHES
WHEN SYSTEM IS IN ERROR.
(DOES NOT INDICATE ERROR CODE)
Fig. 17 Indicator Lights
