AVPTC Service Manual

SERVICING
49
Diagnostic/Status LED Codes
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat)
Green Yellow Red Red Y1
Fault
Description
Message Code
Possible Causes
Corrective Actions Notes & Cautions
• Four consecutive compressor protector
trips with average run time between trips greater than 1 minute and less than 15 minutes.
• Low pressure and high pressure
switc hes are closed.
• Integrated control module
diagnostic/status LED’s display the indicated code.
OFF 2
Flashes
OFF ON if call
present;
OFF if no
call
• High Side Fault HIGH SIDE
FAULT
02 • Blocked condenser coil.
• Outdoor fan not running.
• Check and clean
condenser coil.
• Check outdoor fan
motor; repair/replace as needed.
• Check outdoor fan
motor wiring; repair/replace as needed.
• Check outdoor fan
motor capacitor; replace as needed.
• Turn power OFF prior
to repair.
• Fault will clear after 4
consecutive normal cycles.
• Fault may be cleared by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
• Compressor and outdoor fan are off. • Thermostat demand is present. • Integrated control module
diagnostic/status LED’s display the indicated code.
ON 2
Flashes
OFF ON if call
present;
OFF if no
call
• High Pressure
CO Trip
HPS OPEN 02
• Blocked condenser coil. • Outdoor fan not running.
• Check and clean
condenser coil.
• Check outdoor fan
motor; repair/replace as needed.
• Check outdoor fan
motor wiring; repair/replace as needed.
• Check outdoor fan
motor capacitor; replace as needed.
• Turn power OFF prior
to repair.
• Replace with correct
replacement part(s).
• Compressor and outdoor fan are off. • Low pressure switch trip 3 times within
same thermostat demand.
• Thermostat demand is present. • Integrated control module
diagnostic/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.
ON 2
Flashes
ON ON if call
present;
OFF if no
call
• HPCO Lockout
(3 Trips)
HPS
LOCKOUT
02 • Blocked condenser coil.
• Outdoor fan not running.
• Check and clean
condenser coil.
• Check outdoor fan
motor; repair/replace as needed.
• Check outdoor fan
motor wiring; repair/replace as needed.
• Check outdoor fan
motor capacitor; replace as needed.
• Turn power OFF prior
to repair.
• Must clear fault by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
• Run time for last 4 cycles is less than 3
minutes each.
• Compressor protector has not tripped. • Low pressure and high pressure
switc hes are closed.
• Integrated control module
diagnostic/status LED’s display the indicated code.
OFF 3
Flashes
OFF ON if call
present;
OFF if no
call
• Short Cycling CMPR SHRT
CYCLE
03 • Intermittent thermostat
demand.
• Faulty compressor relay.
• Check thermostat and
thermostat wiring; repair/replace as needed.
• Check compressor
relay operation; replace control as needed.
• Turn power OFF prior
to repair.
• Fault will clear after 4
consecutive normal cycles.
• Fault may be cleared by
cycling 24VAC to control.
• Replace with correct
replacement part(s).
PCBHR101-103
PBBGR101-102