To Clean Indoor Coil; To Clean Outdoor Coil (Outdoor Unit); Cleaning Condensate Drains; Service - Bryant 619E Installation, Start-Up And Service Instructions Manual

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REMOVE FILTER
VI. TO CLEAN INDOOR COIL
To clean the coil, remove indoor unit front panel, and vacuum
the coil fins. Use care not to bend or damage fins.
VII. TO CLEAN OUTDOOR COIL (Outdoor Unit)
WARNING: Some metal parts and sharp fins of out-
door unit coil can cause personal injury during clean-
ing. Clean coil carefully.
To clean the outdoor coil:
1. Remove any dirt or obstruction from discharge opening.
2. Use a garden hose to spray water on the coil. Debris that
collects between coil fins inhibits heat transfer — direct
the water spray between coil fins to flush out debris.
VIII. CLEANING CONDENSATE DRAINS
Clean all drains and drain pans at the start of each cooling
season. Check the flow by pouring water into the drain.

SERVICE

WARNING: When servicing unit, turn off all electric
power to unit to avoid shock hazard or injury from ro-
tating parts.
CAUTION: Do not vent refrigerant to atmosphere
when servicing unit. Reclaim refrigerant during sys-
tem repair or unit removal.
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 is indicated by the flashing of
the green ''UNIT ON'' light on the front of the fan coil unit. A
red LED (light-emitting diode) 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
SET TIME
Fig. 23 — Setting The Current Time
VACUUM CLEAN
Fig. 24 — Air Filter Maintenance
problem. The control will continue to monitor the unit and, if
the 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
is indicated by the flashing of the green ''UNIT ON'' light on
the front of the fan coil unit.
To access the LED indicator light, remove the front cover of
the unit by removing the 3 screws holding it in place.
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 9 lists the number of
quick flashes and the associated fault. If the system does not
operate, and the LED indicator does not flash, either the power
to the control board is off, or the control board has failed.
II. SYSTEM TESTS
System tests listed below are performed continuously by the
microprocessor. If a fault is indicated, then the system allows
only limited operation until the problem is resolved. If the
problem resolves itself, then the code is cleared and opera-
tion resumes.
A. 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.
B. Thermistors
Proper thermistor location and correct temperature sensing
are critical to unit operation. Good thermal contact is also re-
quired. Thermistor cable assemblies are provided with fan
coil units to run between indoor and outdoor units. High-
voltage and thermistor cable assemblies should not touch each
other, and cable runs may be extended up to 200 feet. With
unit running, the thermistor integrity may be checked by mea-
suring the d.c. voltage across the two thermistor connec-
tions. Approximate temperature is indicated in Table 10.
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RINSE WITH WATER