Carrier JK034-074 Quick Test, Thermistor and Potentiometer Check, Quick Test, Output Relay Check

Table 16 Ð Quick Test, Thermistor and Potentiometer Check

QUICK		NORMAL			DESCRIPTION	THERMISTOR OR
TEST
		DISPLAY				POTENTIOMETER*
STEP NO.
				1	Ð Thermistor OK	Supply Air
	1.4.		1
				0	Ð Thermistor Faulty	Thermistor (T1)
				1	Ð Thermistor OK	Return Air
	1.5.		1
				0	Ð Thermistor Faulty	Thermistor (T2)
				1	Ð Thermistor OK	Circuit 1 Condenser Thermistor
	1.6.		1
				0	Ð Thermistor Faulty	(T3)
				1	Ð Thermistor OK	Circuit 2 Condenser Thermistor
	1.7.		1
				0	Ð Thermistor Faulty	(T4)
				1	Ð Thermistor or Potentiometer OK	Accessory Space Temperature Thermistor (T10)
	1.8.		1	0 Ð Thermistor or Potentiometer Faulty or
						or Accessory Reset Potentiometer (P7)
					Option not used
				1	Ð Potentiometer OK	Supply-Air Set Point
	1.9.		1
				0	Ð Potentiometer Faulty	Potentiometer (P1)
				1	Ð Potentiometer OK	Accessory Reset Limit
	2.0.		1
				0	Ð Potentiometer Faulty or Option not used	Potentiometer (P3)
				1	Ð Potentiometer OK	Accessory Demand Limit
	2.1.		1
				0	Ð Potentiometer Faulty or Option not used	Potentiometer (P4)
				1	Ð Potentiometer OK	Minimum Position
	2.2.		1			Economizer
				0	Ð Potentiometer Faulty or Option not used
						Potentiometer (P5)
				1	Ð Potentiometer OK	Warm-Up Set Point
	2.3.		1
				0	Ð Potentiometer Faulty or Option not used	Potentiometer (P6)

*Potentiometer P2 is not listed since it is not part of the quick test. If on unit start-up a Code 83 is displayed, check potentiometer P2.

Table 17 Ð Quick Test, Output Relay Check

QUICK			NORMAL
TEST							DESCRIPTION	RELAY NUMBER
			DISPLAY
STEP NO.
	2.4.			1			1 Ð Open Economizer or Open Relay if no Economizer	K7
	2.5.			1			1 Ð Close Economizer or Close Relay if no Economizer	K8
							1 Ð Energize Fan Relay and Heat Relay	K9* and K10
	2.6.			1
	2.7.			1			Energize Stage 1 Condenser Fan(s)	K11
	2.8.			1			Energize Stage 2 Condenser Fan(s)	K12
	2.9.	0	then	1	then	0	Energize Compressor 1²	K1
	3.0.			0			Energize Unloader 2; Not Used (044, 104)	K2
	3.1.			0			Energize Unloader 1	K3
	3.2.	0	then	1	then	0	Energize Compressor 2²	K5
	3.3.			0			Not Used	K6

LEGEND

CR Ð Control Relay

*K9 (fan relay) will remain on for duration of quick test.

²Compressor will be energized for 10 seconds. Zero indicates open CR; 1 indicates closed CR.

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