Bryant PAYNE 619C - Manual (Page 14)

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SERVICE
NOTE:
Refer to the control, service and troubleshooting guide
sections of the duct-free systems manual for a complete de­
scription of the control system and for detailed service and
troubleshooting procedures. This manual is available from your
distributor.
TROUBLESHOOTING
I. DIAGNOSTIC CODES
This unit is equipped with a microprocessor control which con­
tinuously monitors the operation of the unit. If an opera­
tional fault is detected, a fault code appears on the LCD dis­
play of the remote controller. A red LED indicator light, located
on the control board in the control box of the indoor unit, will
emit a flash code which can be used to troubleshoot a system
problem. The control will continue to monitor the unit and, if
thè conditions which cause the fault are cleared, the unit will
return to normal operation. If the fault code is present for 5
cycles of the unit, the unit will be locked out and the alarm
code will be displayed alternately with the temperature on
the remote controller LCD display.
If the LED indicator light continuously flashes on for one sec­
ond, then off for one second, the control is functioning prop­
erly and no fault is present. A fast flashing LED indicates
that a fault has been detected. Table 7 lists the number of
quick flashes and the associated fault. If the system does not
operate, the remote controller does not display a fault code,
and the LED indicator does not flash, either the power to the
control board is off, or the control board has failed.
Table 7 — System Fault Codes
FAULT
CODE* NO. OF
FLASHES
SYSTEM FAULT
E2 2 Outdoor Coll Thermistor
E3 3 Outdoor Air Thermistort
E4 4 Room Air Thermistor
E5 5 Indoor Coil Thermistor
E6 6 Discharge Air Thermistor
E7 7 Compressor Malfunction
E8 8 Reversing Valve Malfunctlonf
E11 11 Electric Heat Malfunction
E12 12 Outdoor Coil Temperature
‘The fault code is alternately displayed with the temperature on the re­
mote controller LCD display
tHeat pump systems only
II. TEST MODES
The remote controller allows troubleshooting of the system
by running a series of test modes. These tests may be man­
ually initiated with the remote controller to test the system
operation:
• Fan Only Test
• Cooling Mode Test
• Dehumidification Test
• Heat Pump Heating Test
• Emergency Heat Test
See separate controls, service, and troubleshooting guide for
additional details on operating test modes.
III. SYSTEM TESTS
System tests listed below are performed continuously by the
microprocessor. If a fault is indicated, then the system al­
lows only limited operation until the problem is resolved. If
the problem resolves itself, then the code is cleared and op­
eration resumes.
A. Indoor Coil High-Temperature Protection (Heat Pump Sys­
tems Only)
If indoor coil temperature is greater than or equal to 145 F
but less than 165 F for one minute or more, the system shuts
down.
B. Outdoor Coil High-Temperature Protection (Cooling or
Dehumidification Mode Only)
If outdoor coil temperature is greater than or equal to 145 F
but less than 165 F for one minute or more, the system shuts
down.
C. Indoor Coil Freeze Protection (Cooling or Dehumidifica­
tion Mode Only)
If indoor coil temperature is less than or equal to 28 F but
more than —13 F for 4 minutes and the compressor has run
for 24 continuous minutes, the system shuts down.
D. Thermistor Tests
Each thermistor is tested for high limit out of range (shorted
condition) and low limit out of range (open condition). If the
thermistor is out of range, the fault status indicator comes
on and the LED flashes the appropriate fault code.
E. Compressor Failure
If the System is in COOLING or DEHUMIDIFICATION Mode
— After 2 minutes of operation, if the temperature of the in­
door coil is not 2° F less than at the time the call for cool­
ing started, then a compressor failure is indicated on the re­
mote controller LCD display.
If the System is in HEAT PUMP HEATING Mode - After 2
minutes of operation, if the temperature indicated by the out­
door thermistor is not 2° F less than at the time the call for
heating started, then a compressor failure is indicated.
F. Reversing Valve Failure
If the System is in COOLING or DEHUMIDIFICATION Mode
— After 4 minutes of operation, if the temperature at the in­
door coil is 2° F more than at the time the call for heating
started, then a reversing valve failure is indicated.
If the System is in HEAT PUMP HEATING Mode — After 4
minutes of operation, if the temperature indicated by tbe in­
door coil is not 2° F less than at the time the call for heat­
ing started, then a reversing valve failure is indicated.
G. Electric Heater Failure
If, 4 minutes after the heater is energized, the discharge-air
temperature is not 2° F above the return-air temperature, an
electric heater failure is indicated.
H. Filter Dirty Indicator
Indicator (on remote controller LCD display) turns on after
250 hours of indoor fan operation.
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