Johnson Controls 22 SEER installation manual UIM-B-0113, Error Codes - 18K 24K Continued

898841-UIM-B-0113

TABLE 13: Error Codes - 18K 24K (Continued)

						Display Method of Outdoor
		Display Method of Indoor Unit				Unit (Indicator has 3 kinds of
						display status and they will
						be repeated every 5s.)
	Malfunction
No.			Indicator Display (during				□ OFF			A/C status	Possible Reasons
	Name
		Dual-8		blinking,			■ Illuminated
		Code	ON 0.5s and OFF 0.5s)				☆ Blink
		Display
			Operation	Cool	Heating	D5	D6	D16	D30
			Indicator	Indicator	Indicator	(D40)	(D41)	(D42)	(D43)
											After the complete unit is
										During cooling operation,	de-energized for 20mins, check
											whether the thermal grease on
	Module high				OFF 3S					compressor will stop while
											IPM Module of outdoor control
34	temperature	P8			and blink	■	□	☆	■	indoor fan will operate;
											panel AP1 is sufficient and whether
	protection				19 times					During heating operation,
											the radiator is inserted tightly. If its
										the complete unit will stop.
											no use, please replace control
											panel AP1.
										During cooling and drying
	Malfunction of				OFF 3S					operation, compressor will
										stop while indoor fan will
35	voltage dropping	U3			and blink	□	■	■	■		Supply voltage is unstable.
										operate; During heating
	for DC bus-bar				20 times					operation, the complete
										unit will stop.
											1. Measure the voltage of position
											L and N on wiring board (XT), if the
										During cooling and drying	voltage is higher than 150VAC,
											turn on the unit after the supply
	Voltage of DC				OFF 3S					operation, compressor will	voltage is increased to the normal
										stop while indoor fan will	range.
36	bus-bar is	PL			and blink	□	■	■	□
										operate; During heating	2.If the AC input is normal,
	too low				21 times					operation, the complete	measure the voltage of electrolytic
										unit will stop.	capacitor C on control panel (AP1),
											if its normal, there’s malfunction for
											the circuit, please replace the
											control panel (AP1).
											Discharging after the complete unit
											is de-energized for 20mins, check
	Limit/ decrease									All loads operate normally,	whether the thermal grease on
	frequency due to										IPM Module of outdoor control
37		EU				■	■	■	☆	while operation frequency
	high temperature										panel AP1 is sufficient and whether
										for compressor is decreased.
	of module										the radiator is inserted tightly. If its
											no use, please replace control
											panel AP1.
										If this malfunction occurs	1.Supply voltage is lower than
											AC175V;
	The four-way									during heating operation,
38		U7				■	□	☆	□		2.Wiring terminal 4V is loosened
	valve is abnormal									the complete unit will stop
										operation.	or broken; 3.4V is damaged,
											please replace 4V.
										During cooling operation,
	Zero crossing									compressor will stop while	Replace outdoor control panel
39	malfunction of	U9				■	■	☆	□	indoor fan will operate;
											AP1.
	outdoor unit									during heating, the complete
										unit will stop operation.
	Limit/ decrease									All loads operate normally,	Poor air-return in indoor unit or
40	frequency due to	FH				■	■	■	□	while operation frequency for
											fan speed is too low.
	antifreezing									compressor is decreased.

40 Johnson Controls Unitary Products