Service manual

SERVICING
85
Diagnostic/Status LED Codes
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat)
Green Yellow Red Red Y1
Fa ult
Description
Message Code
Possible Causes
Corrective Actions No tes & Cauti ons
• Compressor and outdoor fan are off. • Compressor protector trips four
consecutive times .
• Average run time between trips is less
than 15 seconds.
• Integrated control module
diagno stic/status LED’s display the indicated code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 4
Flashes
ON ON if call
present;
OFF if no
call
• Locked Rotor LOCKED
ROTO R
04 • Compressor bearings are
seized.
• Failed compressor r un
capacitor.
• Faulty run capacitor
wiring.
• Low line voltage.
• Check compressor
operation; repair/ rep lac e as needed.
• Check run capacitor;
replace as needed.
• Check wiring;
repair/ rep lac e as needed.
• Verify line voltage is
within range on rating plate; contact local utility is out of range.
• Turn power OFF prior
to repair.
• Must clear fault by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
• Compressor and outdoor fan are off for
greater than 4 hours.
• Low pressure and high pressure
switches are closed.
• Integrated control module
diagno stic/status LED’s display the indicated code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 5
Flashes
OFF ON if call
present;
OFF if no
call
• Open Circuit OPEN
CIRCUIT
05 • Power is disconnected.
• Failed compressor
protector.
• Co mpress or n ot properly
wired to control.
• Check circuit breakers
and fuses.
• Check wiring to unit;
repair/ rep lac e as needed.
• Check compressor;
repair/ rep lac e as needed.
• Check compressor
wiri ng ; repair/rep lace as needed.
• Turn power OFF prior
to repair.
• Fault will clear after 1
normal cycle.
• Fault may be cleared by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
• Compressor and outdoor fan are off. • Low pressure and high pressure
switches are closed.
• Integrated control module
diagno stic/status LED’s display the indicated code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 6
Flashes
OFF ON if call
present;
OFF if no
call
• Open Start
Circuit
OPEN STA RT 06 • Comp ress or start wi nding
is open.
• Failed compressor r un
capacitor.
• Faulty run capacitor
wiring.
• Co mpress or n ot properly
wired to control.
• Faulty compressor wiring.
• Check compressor;
repair/ rep lac e as needed.
• Check run capacitor;
replace as needed.
• Check wiring;
repair/ rep lac e as needed.
• Turn power OFF prior
to repair.
• Fault will clear after 1
normal cycle.
• Fault may be cleared by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
• Compressor and outdoor fan are off. • Low pressure and high pressure
switches are closed.
• Open start circuit has been detected 4
times with 5 minu te delay between each detection.
• Integrated control module
diagno stic/status LED’s display the indicated code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 6
Flashes
ON ON if call
present;
OFF if no
call
• Open Start
Circuit Lockout
OPEN STA RT
LOCK
06 • Comp ress or start winding
is open.
• Failed compressor r un
capacitor.
• Faulty run capacitor
wiring.
• Co mpress or n ot properly
wired to control.
• Faulty compressor wiring.
• Check compressor;
repair/ rep lac e as needed.
• Check run capacitor;
replace as needed.
• Check wiring;
repair/replace as needed.
• Turn power OFF prior
to repair.
• Must clear fault by
cycling 24VAC to control.
• Replace with correct
replacement part(s).