Error Codes - Friedrich Kuhl SQ05N10 Series Service Manual

ERROR CODES

Error
Code
Front Panel Button Stuck For More
1
Than 20 Seconds
Input Voltage Out of Specification (103
2
- 127 / 187 - 253)
Indoor Temperature Sensor is Open or
3
Shorted
Indoor Coil Temperature Sensor is
4
Open or Shorted
Outdoor Coil Temperature Sensor is
5
Open or Shorted
6 Outdoor Coil > (grater than) 175 F
Indoor Coil < (less than) 30 F for 2
7
consecutive minutes
Unit Cycles > (grater than) 9 Times per
8
hour
Unit Cycles < (less than) 3 Times per
9
Hour
10 Room Freeze Protection
11 WallStat Problem or Connection Issue
12 Not Applicable
13 Not Applicable
Discharge Air Temperature Sensor is
14
Open or Shorted
Not Applicable
15
16 Temperature Beyond Operating Limits
Equipment Doesn't Meet Minimum
17
Configuration
Not Applicable
18
19
Not Applicable
Not Applicable
20
21 Not Applicable
Outdoor Coil Temperature < 30 F for 2
22
consecutive Minutes
23 Not Applicable
24 Not Applicable
Key Sequence
To Access Error Codes
Reset Error Codes & Error History Press
When you have entered the Error Codes section, an "E" will appear. Use the up
Only active error codes will display.
44
Problem
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
input.
Open all relays until voltage is back within specs. Resume operation
Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to
operate
Control Board sets temp to a default of 40°F. Override sensor. Unit
continues to operate.
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.
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.
Turn compressor off. Run High Fan speed. When coil temp reachs 45°F
resume operation after lockout time.
Continue operation. Continue to monitor. Take no action. Log Only.
Continue operation. Continue to monitor. Take no action. Log Only.
Only used if Electric Heat is available. Run High Speed and Electric heat
until room temp reaches 46°F. Display "FRZ" during operation. Logged
Only
Unit operates based on standard t-stat connection. If miswired, unit will not
not operate. (See pages 32 and 68)
Not Applicable
Not Applicable
Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14
ON.
Not Applicable
Ambient temp < (less than) 0°F and ambient temp > (greater than) 130°F.
Set error code 16 ON. When cleared return unit to normal.
Must have compressor enabled and at least 2 fan speeds
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Unit will use electric heat to satisfy heating demands until temp is greater
than 45°F. Unit must be a Heat Pump with electric heat.
Not Applicable
Not Applicable
Press the fan speed and
+ timer/schedule for 3 seconds
Control Board's Action
Action
key for 3 seconds
and down keys to scroll through error codes.