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Table 20 - Gas Heater Troubleshooting Guide
Symptom
Possible Causes
Control does not power up
A.
Faulty 24VAC or 120VAC wiring
B.
Thermostat or transformer
C.
Bad control module
Module LED blinks red
A.
Determine error code and refer to
error codes in Table 19
Spark no occurring during trial for ignition
A.
Faulty spark electrode wiring
B.
Spark gap too wide
C.
Bad control module
Burner does not light during trial for ignition
A.
Faulty valve wiring
B.
Bad valve
C.
Control module not sparking
Burner lights but valve turns off after trial for
ignition
A.
Poor flame
B.
Flame not in contact with spark
electrode or sensor
C.
Dirty contaminated flame sensor
D.
Faulty flame sensor wiring
E.
Poor ground at burner
Maintenance
(See back of the manual for maintenance
log.)
At least once each year, a qualified service
technician should check out the unit. Supply
fans, evaporator coils and air filters should be
inspected monthly.
Periodically during operation, it is necessary
to perform routine service checks on the
performance of the unit. This includes
checking of the air flow, the air filters,
condenser water flow and refrigerant charge.
See Startup section for information on air
flow adjustment and refrigerant charge
adjustment.
DX Cooling
Set unit controls to cooling mode of operation
with supply fans on. Check the fans for
correct operating direction, amperage and
voltage.
Condensate Drain Pans
Drain pans will have moisture present and
require
periodic
cleaning
to
prevent
microbial growth. Cleaning of the drain pans
will also prevent any possible plugging of the
drain lines and overflow of the pan itself.
Cleaning of the drain pans and inside of the
unit should be done only by qualified
personnel.
Improper
installation,
adjustment,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life. Installation and
service must be performed by a
qualified installer. A copy of this IOM
should be kept with the unit.
WARNING
