Samsung E443 Error Code: Refrigerant Leak

Revision Date: 1/24/2025

Models: DVMS, ECO, CHILLER, WATER

Tech Support: (888)-699-6067 (7am to 6pm CST, M-F)

Judgement Method

Error E443 occurs if the compressor is idle and the pressure is below 14 PSIG on the low side.

Troubleshooting Steps

Connect manifold gauges to the system and verify standing pressure compared to ambient temperature using a PT chart.
Connect a laptop and open Samsung service software (Snet Pro2).
Verify manifold gauges and Snet service software readings match. If they do not match, test pressure transducers. Refer to the low- and high-pressure transducer charts below.
If standing pressure is below 14 PSIG while the system is idle, place the system in vacuum mode. Pressure test the system to 500 PSIG with dry nitrogen and test for leaks.
Locate and repair leaks. Conduct the triple evacuation process and weigh in the charge per the install manual or DVM pro file.

*Molex connection on the circuit board may be in a different location across models.

*Check the wiring diagram to ensure proper location.

System Diagram with Key Components Highlighted

The diagram shows key components of the HVAC system including the 'Low Pressure' sensor, 'High Pressure' sensor, 'INVERTER HUB', and 'HUB PCB'. Arrows indicate connections and locations.

Pressure Charts

Low Pressure Transducer Chart

Vout	PSIG	Vout	PSIG	Vout	PSIG	Vout	PSIG
0.5	0	1.5	73	2.5	145	3.5	218
0.6	7	1.6	80	2.6	152	3.6	225
0.7	15	1.7	87	2.7	160	3.7	232
0.8	22	1.8	94	2.8	167	3.8	239
0.9	29	1.9	102	2.9	174	3.9	247
1.0	36	2.0	109	3.0	181	4.0	254
1.1	44	2.1	116	3.1	189	4.1	261
1.2	51	2.2	123	3.2	196	4.2	268
1.3	58	2.3	131	3.3	203	4.3	276
1.4	65	2.4	138	3.4	210	4.4	283
						4.5	290

High Pressure Transducer Chart

Vout	PSIG	Vout	PSIG	Vout	PSIG	Vout	PSIG
0.5	0	1.5	181	2.5	363	3.5	544
0.6	18	1.6	199	2.6	381	3.6	562
0.7	36	1.7	218	2.7	399	3.7	580
0.8	54	1.8	236	2.8	417	3.8	598
0.9	73	1.9	254	2.9	435	3.9	616
1.0	91	2.0	272	3.0	453	4.0	635
1.1	109	2.1	290	3.1	471	4.1	653
1.2	127	2.2	308	3.2	490	4.2	671
1.3	145	2.3	326	3.3	508	4.3	689
1.4	163	2.4	344	3.4	526	4.4	707
						4.5	725

Saturation Pressure-Temperature Data for R-410A (psig)*

Temp. (°F)	Pressure (psig)	Temp. (°C)	Temp. (°F)	Pressure (psig)	Temp. (°C)	Temp. (°F)	Pressure (psig)	Temp. (°C)	Temp. (°F)	Pressure (psig)	Temp. (°C)
-49	5.5	-45.0	1	49.7	-17.2	51	145.8	10.6	101	323.1	38.3
-48	6.0	-44.4	2	51.1	-16.7	52	148.4	11.1	102	327.7	38.9
-47	6.6	-43.9	3	52.4	-16.1	53	151.1	11.7	103	332.4	39.4
-46	7.1	-43.3	4	53.8	-15.6	54	153.8	12.2	104	337.1	40.0
-45	7.7	-42.8	5	55.2	-15.0	55	156.5	12.8	105	341.9	40.6
-44	8.3	-42.2	6	56.6	-14.4	56	159.3	13.3	106	346.7	41.1
-43	8.9	-41.7	7	58.0	-13.9	57	162.1	13.9	1
-42	9.5	-41.1	8	59.5	-13.3	58	164.9	14.4	108	356.5	42.2
-41	10.1	-40.6	9	60.9	-12.8	59	167.8	15.0	109	361.4	42.8
-40	10.8	-40.0	10	62.4	-12.2	60	170.7	15.6	110	366.4	43.3
-39	11.4	-39.4	11	63.9	-11.7	61	173.7	16.1	111	371.5	43.9
-38	12.1	-38.9	12	65.5	-11.1	62	176.7	16.7	112	376.6	44.4
-37	12.7	-38.3	13	67.1	-10.6	63	179.7	17.2	113	381.8	45.0
-36	13.4	-37.8	14	68.6	-10.0	64	182.7	17.8	114	387.0	45.6
-35	14.1	-37.2	15	70.3	-9.4	65	185.8	18.3	115	392.3	46.1
-34	14.8	-36.7	16	71.9	-8.9	66	188.9	18.9	116	397.6	46.7
-33	15.6	-36.1	17	73.5	-8.3	67	192.1	19.4	117	403.0	47.2
-32	16.3	-35.6	18	75.2	-7.8	68	195.3	20.0	118	408.4	47.8
-31	17.1	-35.0	19	76.9	-7.2	69	198.5	20.6	119	413.9	48.3
-30	17.8	-34.4	20	78.7	-6.7	70	201.8	21.1	120	419.4	48.9
-29	18.6	-33.9	21	80.4	-6.1	71	205.1	21.7	121	425.0	49.4
-28	19.4	-33.3	22	82.2	-5.6	72	208.4	22.2	122	430.7	50.0
-27	20.2	-32.8	23	84.0	-5.0	73	211.8	22.8	123	436.4	50.6
-26	21.0	-32.2	24	85.8	-4.4	74	215.2	23.3	124	442.1	51.1
-25	21.9	-31.7	25	87.7	-3.9	75	218.7	23.9	125	447.9	51.7
-24	22.7	-31.1	26	89.6	-3.3	76	222.2	24.4	126	453.8	52.2
-23	23.6	-30.6	27	91.5	-2.8	77	225.7	25.0	127	459.8	52.8
-22	24.5	-30.0	28	93.4	-2.2	78	229.3	25.6	128	465.8	53.3
-21	25.4	-29.4	29	95.4	-1.7	79	232.9	26.1	129	471.8	53.9
-20	26.3	-28.9	30	97.4	-1.1	80	236.5	26.7	130	477.9	54.4
-19	27.3	-28.3	31	99.4	-0.6	81	240.2	27.2	131	484.1	55.0
-18	28.2	-27.8	32	101.4	0.0	82	244.0	27.8	132	490.3	55.6
-17	29.2	-27.2	33	103.5	0.6	83	247.8	28.3	133	496.6	56.1
-16	30.2	-26.7	34	105.6	1.1	84	251.6	28.9	134	503.0	56.7
-15	31.2	-26.1	35	107.7	1.7	85	255.4	29.4	135	509.4	57.2
-14	32.2	-25.6	36	109.9	2.2	86	259.3	30.0	136	515.9	57.8
-13	33.2	-25.0	37	112.1	2.8	87	263.3	30.6	137	522.5	58.3
-12	34.3	-24.4	38	114.3	3.3	88	267.3	31.1	138	529.1	58.9
-11	35.4	-23.9	39	116.5	3.9	89	271.3	31.7	139	535.8	59.4
-10	36.5	-23.3	40	118.8	4.4	90	275.4	32.2	140	542.5	60.0
-9	37.6	-22.8	41	121.1	5.0	91	279.5	32.8	141	549.3	60.6
-8	38.7	-22.2	42	123.4	5.6	92	283.6	33.3	142	556.2	61.1

Proper Personal Protective Equipment (PPE) Required. These photos may not represent your exact system.

For use by Samsung HVAC Trained & Licensed Service Providers Only. www.SamsungHVAC.com

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