DIAGNOSTIC
CODES
CODE
STATUS
DISPLAY
ERROR
SUGGESTED
ACTION
UGHT
Freeze Protection
Engaged,
The
room
temperature
No
Action
required, This setting willdisengage when
the
FP
measured bythe wireless remote thermostat
or
indoorambient Y N
room
temperature rises above 43'F,
thermistoractive sensorfalls
below
40'F,
Fd
FrontDesk swlch
is
closed. All outputs are swlched
off,
Y Open frontdeskswitch to allow occupant unit operation,
Eo
Un-Configured Service Board -Y Y EnterConfiguration
Menu
and
set"C3"to
"c"
All operation held awaling configuration forcoolers with electric heat or
"H"
for heatpumps.
EH
Emeregency Hydronic
Engaged,
The
EHH
switch isclosed. Y N
Open
frontemergencyhydroni: switch to allow
Compressor is switched off, unitoperation,
LS
load
SheddingEngaged.
The
lS
switch is closed, Y N Open bad shedding switch
Com
pressor and Electric heat is switched
off.
to allow occupant unitoperation.
On
Control isconfigured
to
respond to awired thermostat Y N No action Ifa wired thermostat is
being
used,
Otherwise, see ConfigurationSettings,
IndoorAmbient Thermistorreeds outside the
range -20"F to 200°F & the wirelessthermostat is not
F1
communi:ating
to
the Lrlit control or Y Y Replace black IndoorAmbient Thermistor or
Wireless Remote Thermostat,
IndoorAmbient Thermistor (IAT)
wlhout
awireless remote
thermostatreads outsilethe range
-zooF
to
ZOO°F,
F2
Wireless
Rem
ote
Thermostatfailure N N Replace WirelessThermostat.
F3
Indoor
Am
bient Thermistorreeds Y N Replace black Indoor Ambient Thermistor.
outsilethe range -20"F to 200°F
F4
Indoor
Col
Thermistoreither above N Y Replace
Red
Indoor Coil Thermistor .
or
below operating tolerances,
F5
Wireless Thermostat failure, N Y Attempt to rebind Wireless Thermostat
or
Replace WirelessThermostat
F6
IndoorDischarge Thermistoreitherabove N Y Replace Yellow Indoor
or
below operating tolerances. Discharge Thermistor,
Fb
Low
Remote BatteryWarning. N Y Replace Batteries in Wireless Devices,
H1
High Voitage Protection engaged, N Check forincoming power at correct voltage.
Powersupply voltage
is
to
high.
br
Brown Out Protection engaged. N N Check forIncoming power
at
correct voltage.
Powerwas lost or voltage
is
low.
L6
Discharge AirToo
Hot.
N Y Clean Filter or Remove Air Blockage,
LC
Outdoor Coil Thermistor temperature high. N Y Clean Condenser Coils, Check
Fan
for
faull Code will reset aftercleaning,
C2
IndoorAirRecirculation, Large
dela
between thermostat
and
N Y
Clean
FilterorRemove AirBlockage orClose
return, Vent Door
or
Improve indoorto outdoorseal.
C5
Outdoor Coil temperature too high foroutdoorambient N Y Check for Bbcked Outdoor Air or
Clean
Coil.
temperature.
Clean
filer. Check for fan and blower operatkm.
C3
Indoor
Col
isfreezing
up,
N Y Check forRefrigerant loss
or
Restricted
capiDary
tube,
Clean filter, Check for fan
and
blower operation.
C4
Indoor con froze up, N Y Check for Refrigerant loss
or
Restricted capillarytube,
C6
Poor UnitPerformance. N Y Check
for
bbwermotor. compressor,
or
electri:
heat
operation.
17