Page 61
Corp. 1244-L9
Continued — 09 through 12 and 30 kBtu System Status and Error Codes — Indoor Character Display and Outdoor LEDs
Indoor
Character
Display
Outdoor LED Displays
(number of blinks)
Error Description System Status
Troubleshooting for Possible
Causes
Yellow Red Green
U7 OFF OFF OFF
Reversing valve
malfunction
All system functions are
terminated except indoor fan.
S Check input voltage on outdoor unit
terminal strip (N and L terminals). If
lower than 175 VAC, correct
voltage problem.
S Check reversing valve wiring
connection for damage.
S If voltage and wiring connections
are correct, replace reversing
valve.
NONE 1 OFF OFF
Compressor has an
open circuit.
S Check connections between com
pressor and outdoor control (control
terminals are marked U, V and W).
NONE OFF 8 OFF
Outdoor ambient air
temperature is not
within the outdoor
unit's start up range
Normal status indicator when unit
is turned off.
Status indicator. System functioning
properly. Outdoor unit will not oper
ate if outdoor ambient temperature is
out of range.
NONE OFF 11 OFF
Frequency limiting
module temperature
All system functions are
terminated except indoor fan.
S Verify proper attachment of heat
sink.
S Clean heat sink, if necessary.
NONE OFF 13 OFF Power issue
Compressor speed automatically
adjusted to match conditions.
System power issue. See unit infor
mation manual for further informa
tion.
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