Friedrich R-410A service manual Error Codes And Alarm Status, Key Sequence

ERROR CODES AND ALARM STATUS

Error	Maintenance		Problem	Control Board's Action
Code	ICON
1	Flash	Front Panel Button Stuck For More		Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
		Than 20 Seconds		input. ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS
2	Flash	Input Voltage Out of Specification (103		Stop.Open all relays until voltage is back within specs. Resume operation
		- 127 / 187 - 253)
3	Flash	Indoor Temperature Sensor is Open or		Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to
		Shorted		operate
4	Flash	Indoor Coil Temperature Sensor is		Control Board sets temp to 40°F. Override sensor. Unit Continues to
		Open or Shorted		operate.
		Outdoor Coil Temperature Sensor is		Sets temp to 20°F. Override sensor. Continue operation. Use Elec Heat if
5	Flash			available for HEATING. If not available use HEAT PUMP if outdoor temp
		Open or Shorted
				allows.
				Shut down for 5 min. Resume operation for 3 min. Continues to monitor. If
6	Flash	Outdoor Coil > (grater than) 175 F		test fails 3 times, the severity is increased and the unit operation is locked
				out.
7	Flash	Indoor Coil < (less than) 30 F for 2		Turn compressor off. Run High Fan speed. When coil temp reachs 45°F
		consecutive minutes		resume operation after lockout time.
8	Log Only	Unit Cycles > (grater than) 9 Times per		Continue operation. Continue to monitor. Take no action. Log Only.
		hour
9	Log Only	Unit Cycles < (less than) 3 Times per		Continue operation. Continue to monitor. Take no action. Log Only.
		Hour
				Only used if Electric Heat is available. Run High Speed and Electric heat
10	Log Only	Room Freeze Protection		until room temp reaches 46°F. Display "FRZ" during operation. Logged
				Only
11	On	WallStat Problem or Connection Issue		Severity 4 error is. Unit operates based on standard input mapping.
				Severity 2 error opens all relays. Unit will not operate.
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		Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14
		Open or Shorted		ON.
15	Solid On	Heat Pump Error		If indoor coil temp < (Lesser than) ambient temp for 3 minutes. Unit uses
				electric heat to satisfy heating 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		Must have compressor enabled and at least 2 fan speeds
		Configuration
18	Flash	Special Test 1	Severity Level 1	Unit shuts down. Inputs via front panel or t-stat are ignored. Qualified
				Technical Service required URGENT
19	Flash	Special Test 2	Severity Level 2	Unit operates. Qualified Technical Service required
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, Log Only	Special Test 4	Severity Level 4	Error is Logged Only. Unit operates. Severity 4 keeps unit running.
22	OFF, Log Only	Outdoor Coil Temperature < 30 F for 2		Unit will use electric heat to satisfy heating demands until temp > 45°F.
		consecutive Minutes		Unit must be a Heat Pump.
23	OFF, Log Only	Frost Protection (for Heat Pump Only		Unit will run active defrost for a minimum of 6 minutes when Heat Pump
		Unit- YS10M10)		run time is greater than 60 minutes and outdoor coil temp is 26 F or less.
24	Flash	Outdoor Air Temperature Sensor is		Continue with normal operation. Continue to monitor sensor.
		Open or Shorted

Key Sequence

Enter Maintenance Menu

Reset Error Codes & Error History

Action Press SYSTEM + SCHEDULE + BACK + DISPLAY/ENTER for 6 secs or until double beep sounds() Press + for 3 secs or until double beep sounds ()

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