22
POSSIBLE CAUSE VERIFICATION SOLUTION
Thermostat Not Level Check level of thermostat If necessary, level thermostat.
Defective Thermostat With volt meter, check resistance of If resistance, thermostat is O.K.
thermostat contacts. If no resistance, replace thermostat.
Loose Low Voltage Wiring Check all wiring connections for Tighten all loose connections.
tightness.
Defective Low Voltage Transformer Check transformer as described on If defective, replace transformer.
page 25 in this manual.
Inadequate Electrical Service Check electrical service against Replace electrical service with
minimum requirements. adequately sized service.
Flash Code - 1 Flash (Float Switch) Check drain plan and condensate trap. Clean condensate trap.
CONDITION: ESP-G UNIT & CONDENSING UNIT WILL NOT START
POSSIBLE CAUSE VERIFICATION SOLUTION
Shorted Or Broken Wiring Check wiring. If necessary, repair or replace wiring.
Loose Low or High Voltage Wiring Check all wiring connections for Tighten all loose connections.
tightness.
Defective Blower Motor Check motor as described on page 25 If defective, replace motor.
in this manual.
CONDITION: ESP-G UNIT WILL NOT START, BUT CONDENSING UNIT RUNS
POSSIBLE CAUSE VERIFICATION SOLUTION
Defective Thermostat With volt meter, check resistance of If resistance, thermostat is O.K.
thermostat contacts. If no resistance, replace thermostat.
Loose Low Or High Voltage Wiring Check all wiring connections for Tighten all loose connections.
tightness.
If no voltage, check coil for ice. If
ice is present, check air filter, return
air duct & blower motor for air flow.
Flash Code - 2 Flashes With volt meter, check for 24v
(Anti-Frost Switch) at terminal “AFS”. If no ice on coil, check anti-frost
switch for continuity. If no
continuity, replace switch.
If 24v, switches are O.K.
Shorted Or Broken Wiring Check wiring. If necessary, repair or replace wiring.
Condensing Unit Check according to manufacturer’s Repair or replace as directed by
instructions. manufacturer.
CONDITION: ESP-G UNIT RUNS, BUT CONDENSING UNIT WILL NOT START
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