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Error
Code
Maintenance
ICON
Problem Control Board's Action
1Flash
Front Panel Button Stuck For More
Than 20 Seconds
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
input.
ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS
2Flash
Input Voltage Out of Specification (103
- 127 / 187 - 253
)
Stop.Open all relays until voltage is back within specs. Resume operation
3Flash
Indoor Temperature Sensor is Open or
Shorted
Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to
o
p
erate
4Flash
Indoor Coil Temperature Sensor is
O
p
en or Shorted
Control Board sets temp to 40°F. Override sensor. Unit Continues to
o
p
erate.
5Flash
Outdoor Coil Temperature Sensor is
Open or Shorted
Sets temp to 20°F. Override sensor. Continue operation. Use Elec Heat if
available for HEATING. If not available use HEAT PUMP if outdoor temp
allows.
6 Flash Outdoor Coil > (grater than) 175 F
Shut down for 5 min. Resume operation for 3 min. Continues to monitor. If
test fails 3 times, the severity is increased and the unit operation is locked
out.
7Flash
Indoor Coil < (less than) 30 F for 2
consecutive minutes
Turn compressor off. Run High Fan speed. When coil temp reachs 45°F
resume o
p
eration after lockout time.
8Log Only
Unit Cycles > (grater than) 9 Times per
hour
Continue operation. Continue to monitor. Take no action. Log Only.
9Log Only
Unit Cycles < (less than) 3 Times per
Hour
Continue operation. Continue to monitor. Take no action. Log Only.
10 Log Only Room Freeze Protection
Only used if Electric Heat is available. Run High Speed and Electric heat
until room temp reaches 46°F. Display "FRZ" during operation. Logged
Onl
y
11 On WallStat Problem or Connection Issue
Severity 4 error is. Unit operates based on standard input mapping.
Severit
y
2 error o
p
ens all rela
y
s. Unit will not o
p
erate.
12 Flash Discharge Air > (greater than) 185 F
Shutdown heat pump and electric heater. Run high fan speed until temp is
100°F. Resume operation. Third occurance in 1 hour locks unit out.
13 Flash Prerssure Limit Switch Open
If unit is cooling or heat pump on,shut down compressor. Run high fan until
switch closes. Resume operation. Third occurance in 1 hour locks unit out.
14 Flash
Discharge Air Temperature Sensor is
O
p
en or Shorted
Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14
ON.
15 Solid On Heat Pump Error
If indoor coil temp < (Lesser than) ambient temp for 3 minutes. Unit uses
electric heat to satisf
y
heatin
g
demand.
16 Flash Temperature Beyond Operating Limits
Ambient temp < (less than) 0°F and ambient temp > (greater than) 130°F.
Set error code 16 ON. When cleared return unit to normal.
17 Flash
Equipment Doesn't Meet Minimum
Confi
g
uration
Must have compressor enabled and at least 2 fan speeds
18 Flash Special Test 1 Severity Level 1
Unit shuts down. Inputs via front panel or t-stat are ignored. Qualified
Technical Service re
q
uired URGENT
19 Flash S
p
ecial Test 2 Severit
y
Level 2 Unit o
p
erates. Qualified Technical Service re
q
uired
20 Solid On Special Test 3 Severity Level 3
Error is Logged Only. Unit operates. Severity 3 keeps unit running.
Attention is needed
21 OFF
,
Lo
g
Onl
y
S
p
ecial Test 4 Severit
y
Level 4 Error is Lo
gg
ed Onl
y
. Unit o
p
erates. Severit
y
4 kee
p
s unit runnin
g
.
22 OFF, Log Only
Outdoor Coil Temperature < 30 F for 2
consecutive Minutes
Unit will use electric heat to satisfy heating demands until temp > 45°F.
Unit must be a Heat Pum
p
.
23 OFF, Log Only
Frost Protection (for Heat Pump Only
Unit- YS10M10)
Unit will run active defrost for a minimum of 6 minutes when Heat Pump
run time is greater than 60 minutes and outdoor coil temp is 26 F or less.
24 Flash
Outdoor Air Temperature Sensor is
O
p
en or Shorted
Continue with normal operation. Continue to monitor sensor.
Key Sequence
Action
Enter Maintenance Menu Press SYSTEM + SCHEDULE + BACK + DISPLAY/ENTER for 6 secs or until double beep sounds()
Reset Error Codes & Error History Press
+
for 3 secs or until double beep sounds ( )
ERROR CODES AND ALARM STATUS