Friedrich Air Conditioner SQ10N10 User Manual

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of 67
 
Error
Code
Problem Control Board's Action
1
Front Panel Button Stuck For More
Than 20 Seconds
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
input.
2
Input Voltage Out of Specification (103
- 127 / 187 - 253
)
Open all relays until voltage is back within specs. Resume operation
3
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
4
Indoor Coil Temperature Sensor is
O
p
en or Shorted
Control Board sets temp to a default of 40°F. Override sensor. Unit
continues to o
p
erate.
5
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 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 unit operation is locked out. Unplug and replug to
reset.
7
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.
8
Unit Cycles > (grater than) 9 Times per
hour
Continue operation. Continue to monitor. Take no action. Log Only.
9
Unit Cycles < (less than) 3 Times per
Hour
Continue operation. Continue to monitor. Take no action. Log Only.
10 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 WallStat Problem or Connection Issue
Unit operates based on standard t-stat connection. If miswired, unit will not
not o
p
erate.
(
See
p
a
g
es 32 and 68
)
12
13 Not Applicable Not Applicable
Not Applicable Not Applicable
Not Applicable Not Applicable
Not Applicable Not Applicable
14
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
16 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
Equipment Doesn't Meet Minimum
Confi
g
uration
Must have compressor enabled and at least 2 fan speeds
18
19
20
21
22
Outdoor Coil Temperature < 30 F for 2
consecutive Minutes
Unit will use electric heat to satisfy heating demands until temp is greater
than 45°F.
Unit must be a Heat Pum
p
with electric heat.
23
Not Applicable Not Applicable
Not Applicable Not Applicable
Not Applicable Not Applicable
Not Applicable Not Applicable
24
Not Applicable Not Applicable
Key Sequence
Action
To Access Error Codes
When you have entered the Error Codes section, an “E” will appear. Use the up and down keys to scroll through error codes.
Only active error codes will display.
Press the fan speed and key for 3 seconds
Reset Error Codes & Error History Press
+ timer/schedule for 3 seconds
ERROR CODES
44

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