Carrier Bryant Payne day and night 585A/YAC - Routine Maintenance Procedures; Heating Troubleshooting Guide

TABLE VIII—HEATING SERVICE ANALYSIS CHART
SYMPTOM
CAUSE
REMEDY
Pilot will not light.
Pilot glow coil burned out. (SSSAA'AC)
Replace glow coil.
No spark at electrode.
(585A/YACR & SSSAA'ACX)
Check air gap between electric tip and pilot
burner. Gap should be 3/32 (+ 0.025/-0.005).
Readjust as necessary.
Check moisture or dirt accumulation on electrode
ceramic—clean ceramic with cloth.
Cracked ceramic—replace pilot electrode assembly.
Check for loose or broken wiring at and between
electronic control box and electrode—replace
wire as necessary.
Check fuses or circuit breaker to insure voltage
to unit.
Check 24-volt input, to electronic igniter control. If
you find 24 volts and the above remedies have been
explored, replace electronic igniter.
Spark shorting out to main burner.
(585A/YACR & 586AA'ACX)
Realign electrode tip away from main burner
but maintain spark gap to pilot burner.
No gas at pilot burner (all units).
Check to see if pilot valve is opening. Check for
loose or broken wiring connections. If no
deficiency is found, replace pilot valve.
Burners will not ignite.
Water in gas line
Drain—install.water trap.
No power to furnace
Check power supply, fuses, wiring, or
circuit breaker.
No 24-volt power supply to control circuit
Check transformer—replace if necessary.
Miswired or loose connections
Check all wiring and wirenut connections.
Dirty pilot—yellow flame
Clean pilot orifice.
Pilot burning properly—sharp blue flame
Replace pilot.
Burned out heat anticipator in thermostat
Replace thermostat.
No gas at main burners
Check to see if main gas valve is opening. Look
for loose or broken wiring connections. If
no deficiency is found, replace yalve assembly.
Flame probe or connecting lead is shorted or open
Correct electric shorting or open circuit.
Broken thermostat wire
Run continuity check to locate break.
Inadequate heating
Dirty air filter
Replace filter.
Gas input to furnace too low
Check gas pressure at manifold. Clock gas meter
for input. If too low, increase manifold
pressure, or replace with correct orifices.
Unit undersized for application
Replace with proper unit—or add additional unit.
Restricted airflow
Clean or replace filter—or remoye any restriction.
Blower speed too low
Use faster speed tap—or install optional blower.
Limit switch cycles main burners
OFF setting of fan control set too high—reset.
Dirty air filters—clean or replace.
Registers closed, restricted ductwork—open
or remoye restriction.
Check heat anticipator setting on thermostat—readjust.
Poor flame characteristics
Incomplete combustion results in:
Aldehyde odors, (CO), sooting flame—floating flame
Air shutters on burners closed—adjust to soft blue flame.
Check all screws around flue outlets and burner
compartment—^tighten.
LACK OF COMBUSTION AIR.
Cracked heat exchanger—replace.
Overfired 'furnace—reduce input, or change orifices.
Check vent for restriction—clean as required.
Check orifice to burner alignment.
The minimum maintenance that should be performed on
this equipment is as follows:
1. Check air filter each month. Clean or replace as re¬
quired.
2. Check cooling coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean as necessary.
3. Check blower motor and wheel for cleanliness and
lubrication each heating and cooling season. Clean and
lubricate as necessary.
4. Check electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service as necessary.
CAUTION: Because of possible damage to the equipment or
personal injury, maintenance should be performed by
qualified persons only.
WARNING: As with any mechanical equipment, personal
injury can result from sharp metal edges, etc.; therefore, be
careful when removing parts.
A. A i r Filter
Filters are not provided as an intergral part of the unit. A
filter must be used with the unit and must be inspected fre¬
quently. When the filter becomes clogged with dust and lint,
it should be replaced (disposable-type) or cleaned (clean-
able-type). The filter should be inspected at least once each
month, and replaced or cleaned at least twice during the
year (more often, if necessary).
CAUTION: Do not operate the unit for any period of time
without having a suitable filter in place in the return air
duct system. Always replace filter with same size and type.
B. Lubrication
The fan and blower motors are prelubricated for 2 years of
heavy duty or 5 years of normal duty. When lubrication is
necessary, send the motor to an authorized motor repair
shop.
C. Evaporator and Condenser Coils
CAUTION: Be sure all electrical power to the unit is turned
OFF before cleaning coils.
The coils are easily cleaned when they are dry; therefore,
they should be check and cleaned before each cooling
season. The coils should be inspected periodically during the
cooling season.
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