Board 28

R-404A (HP62) Walk In Freezer - Electric Defrost - Problem 28

SUC
COR
SLT
SH
HEAD
COR
LLT
SC
EEA
LEA
ΔT
ECA
LCA
ΔT
AMP
DLT

Submit Your Diagnosis
CFM seized
Coil open
Compressor inefficient
Compressor tight (drag/seizing)
Condenser fouled or dirty
Contact burned off
Contact stuck closed
EFM seized
Evaporator airflow low
Heater open
HPC open
low condensing ambient
low voltage
LPC open or set incorrectly
LLSV coil open
Mixed refrigerants
No faults
No power
No refrigerant
Non-condensables
Refrigerant overcharge
Refrigerant undercharge
restriction (High Side)
T-Stat open
TXV bulb charge lost
TXV bulb loose
winding grounded
windings or overload open
wiring open

Symptoms Key
SUC	Suction Pressure
COR	Corresponding Temperature
SLT	Suction Line Temperature
SH	Superheat
HEAD	Head Pressure
COR	Corresponding Temperature
LLT	Liquid Line Temperature
SC	Subcooling
EEA	Entering Evaporator Air Temperature
LEA	Leaving Evaporator Air Temperature
ΔT	Delta T: change in temperature (ΔT air)
ECA	Entering Condenser Air Temperature
LCA	Leaving Condenser Air Temperature
ΔT	Delta T: change in temperature (ΔT air)
AMP	Amperage Draw (compressor, actual amps)
DLT	Discharge Line Temperature

Schematic and Piping Diagrams Key
A	Timer contact A (NC = refrigeration)
B	Timer contact B (NO = defrost)
CAP	Capacitor
CC	Compressor Contactor
CFM	Condenser Fan Motor
COMPR	Compressor
FDT / DTT	Fan Delay Thermostat / Defrost Termination Thermostat
EFM	Evaporator Fan Motor
FTD	Fan Delay Thermostat
HPC	High Pressure Control
HTR	Heater
L1	Line 1
L2	Line 2
LPC	Low Pressure Control
LLSV	Liquid Line Solenoid Valve
LPC	Low Pressure Control
PR	Potential Relay
TM	Timer Motor
T-STAT	Thermostat
VAC	Volts Alternating Current

IMP

R-404A Vapour

Temp    Pressure
deg F    psig
-135	-14.0
-134	-14.0
-133	-13.9
-132	-13.9
-131	-13.8
-130	-13.8
-129	-13.8
-128	-13.7
-127	-13.7
-126	-13.6
-125	-13.6
-124	-13.5
-123	-13.5
-122	-13.4
-121	-13.4
-120	-13.3
-119	-13.3
-118	-13.2
-117	-13.1
-116	-13.1
-115	-13.0
-114	-12.9
-113	-12.8
-112	-12.8
-111	-12.7
-110	-12.6
-109	-12.5
-108	-12.4
-107	-12.4
-106	-12.3
-105	-12.2
-104	-12.1
-103	-12.0
-102	-11.9
-101	-11.8
-100	-11.6
-99	-11.5
-98	-11.4
-97	-11.3
-96	-11.2
-95	-11.0
-94	-10.9
-93	-10.8
-92	-10.6
-91	-10.5
-90	-10.3
-89	-10.2
-88	-10.0
-87	-9.9
-86	-9.7
-85	-9.5
-84	-9.4
-83	-9.2
-82	-9.0
-81	-8.8
-80	-8.6
-79	-8.4
-78	-8.2
-77	-8.0
-76	-7.8
-75	-7.6
-74	-7.4
-73	-7.1
-72	-6.9
-71	-6.7
-70	-6.4
-69	-6.2
-68	-5.9
-67	-5.6
-66	-5.4
-65	-5.1
-64	-4.8
-63	-4.5
-62	-4.2
-61	-3.9
-60	-3.6
-59	-3.3
-58	-2.9
-57	-2.6
-56	-2.3
-55	-1.9
-54	-1.6
-53	-1.2
-52	-0.8
-51	-0.4
-50	-0.1
-49	0.3
-48	0.7
-47	1.2
-46	1.6
-45	2.0
-44	2.4
-43	2.9
-42	3.4
-41	3.8
-40	4.3
-39	4.8
-38	5.3
-37	5.8
-36	6.3
-35	6.8
-34	7.4
-33	7.9
-32	8.5
-31	9.0
-30	9.6
-29	10.2
-28	10.8
-27	11.4
-26	12.0
-25	12.7
-24	13.3
-23	14.0
-22	14.6
-21	15.3
-20	16.0
-19	16.7
-18	17.4
-17	18.2
-16	18.9
-15	19.7
-14	20.4
-13	21
-12	22
-11	23
-10	24
-9	25
-8	25
-7	26
-6	27
-5	28
-4	29
-3	30
-2	31
-1	32
0	33
1	34
2	35
3	36
4	37
5	38
6	39
7	40
8	41
9	42
10	43
11	44
12	45
13	47
14	48
15	49
16	50
17	52
18	53
19	54
20	55
21	57
22	58
23	59
24	61
25	62
26	64
27	65
28	66
29	68
30	69
31	71
32	72
33	74
34	76
35	77
36	79
37	80
38	82
39	84
40	85
41	87
42	89
43	91
44	92
45	94
46	96
47	98
48	100
49	102
50	104
51	106
52	108
53	110
54	112
55	114
56	116
57	118
58	120
59	122
60	124
61	126
62	129
63	131
64	133
65	136
66	138
67	140
68	143
69	145
70	147
71	150
72	152
73	155
74	158
75	160
76	163
77	165
78	168
79	171
80	173
81	176
82	179
83	182
84	185
85	188
86	190
87	193
88	196
89	199
90	202
91	206
92	209
93	212
94	215
95	218
96	221
97	225
98	228
99	231
100	235
101	238
102	242
103	245
104	249
105	252
106	256
107	259
108	263
109	267
110	270
111	274
112	278
113	282
114	286
115	290
116	294
117	298
118	302
119	306
120	310
121	314
122	318
123	323
124	327
125	331
126	336
127	340
128	344
129	349
130	354
131	358
132	363
133	368
134	372
135	377
136	382
137	387
138	392
139	397
140	402
141	407
142	412
143	417
144	422
145	428
146	433
147	439
148	444
149	450
150	455
151	461
152	466

R-404A Liquid

Temp    Pressure
deg F    psig
-135	-13.9
-134	-13.9
-133	-13.8
-132	-13.8
-131	-13.8
-130	-13.7
-129	-13.7
-128	-13.6
-127	-13.6
-126	-13.5
-125	-13.5
-124	-13.4
-123	-13.4
-122	-13.3
-121	-13.3
-120	-13.2
-119	-13.1
-118	-13.1
-117	-13.0
-116	-12.9
-115	-12.9
-114	-12.8
-113	-12.7
-112	-12.6
-111	-12.5
-110	-12.5
-109	-12.4
-108	-12.3
-107	-12.2
-106	-12.1
-105	-12.0
-104	-11.9
-103	-11.8
-102	-11.7
-101	-11.6
-100	-11.4
-99	-11.3
-98	-11.2
-97	-11.1
-96	-11.0
-95	-10.8
-94	-10.7
-93	-10.5
-92	-10.4
-91	-10.3
-90	-10.1
-89	-9.9
-88	-9.8
-87	-9.6
-86	-9.4
-85	-9.3
-84	-9.1
-83	-8.9
-82	-8.7
-81	-8.5
-80	-8.3
-79	-8.1
-78	-7.9
-77	-7.7
-76	-7.5
-75	-7.3
-74	-7.0
-73	-6.8
-72	-6.5
-71	-6.3
-70	-6.0
-69	-5.8
-68	-5.5
-67	-5.2
-66	-5.0
-65	-4.7
-64	-4.4
-63	-4.1
-62	-3.8
-61	-3.5
-60	-3.1
-59	-2.8
-58	-2.5
-57	-2.1
-56	-1.8
-55	-1.4
-54	-1.1
-53	-0.7
-52	-0.3
-51	0.1
-50	0.5
-49	0.9
-48	1.3
-47	1.7
-46	2.1
-45	2.6
-44	3.0
-43	3.5
-42	4.0
-41	4.4
-40	4.9
-39	5.4
-38	5.9
-37	6.4
-36	7.0
-35	7.5
-34	8.0
-33	8.6
-32	9.2
-31	9.7
-30	10.3
-29	10.9
-28	11.5
-27	12.2
-26	12.8
-25	13.4
-24	14.1
-23	14.8
-22	15.4
-21	16.1
-20	16.8
-19	17.5
-18	18.3
-17	19.0
-16	19.8
-15	20.5
-14	21.3
-13	22.1
-12	22.9
-11	23.7
-10	24.6
-9	25.4
-8	26
-7	27
-6	28
-5	29
-4	30
-3	31
-2	32
-1	33
0	34
1	35
2	36
3	37
4	38
5	39
6	40
7	41
8	42
9	43
10	44
11	45
12	47
13	48
14	49
15	50
16	52
17	53
18	54
19	55
20	57
21	58
22	59
23	61
24	62
25	63
26	65
27	66
28	68
29	69
30	71
31	72
32	74
33	75
34	77
35	79
36	80
37	82
38	84
39	85
40	87
41	89
42	90
43	92
44	94
45	96
46	98
47	100
48	101
49	103
50	105
51	107
52	109
53	111
54	113
55	115
56	117
57	120
58	122
59	124
60	126
61	128
62	131
63	133
64	135
65	137
66	140
67	142
68	144
69	147
70	149
71	152
72	154
73	157
74	159
75	162
76	165
77	167
78	170
79	173
80	175
81	178
82	181
83	184
84	187
85	190
86	193
87	195
88	198
89	201
90	205
91	208
92	211
93	214
94	217
95	220
96	223
97	227
98	230
99	233
100	237
101	240
102	244
103	247
104	251
105	254
106	258
107	261
108	265
109	269
110	273
111	276
112	280
113	284
114	288
115	292
116	296
117	300
118	304
119	308
120	312
121	316
122	320
123	325
124	329
125	333
126	338
127	342
128	347
129	351
130	356
131	360
132	365
133	370
134	374
135	379
136	384
137	389
138	394
139	399
140	404
141	409
142	414
143	419
144	424
145	430
146	435
147	440
148	446
149	451
150	457
151	462
152	468

R-404A Vapour

Temp    Pressure
deg C   kPa
-92.0	5.2
-91.5	5.4
-91.0	5.7
-90.5	5.9
-90.0	6.2
-89.5	6.4
-89.0	6.7
-88.5	7.0
-88.0	7.2
-87.5	7.5
-87.0	7.8
-86.5	8.2
-86.0	8.5
-85.5	8.8
-85.0	9.2
-84.5	9.5
-84.0	9.9
-83.5	10.3
-83.0	10.7
-82.5	11.1
-82.0	11.5
-81.5	11.9
-81.0	12.3
-80.5	12.8
-80.0	13.3
-79.5	13.8
-79.0	14.3
-78.5	14.8
-78.0	15.3
-77.5	15.8
-77.0	16.4
-76.5	17.0
-76.0	17.6
-75.5	18.2
-75.0	18.8
-74.5	19.4
-74.0	20.1
-73.5	20.8
-73.0	21.5
-72.5	22.2
-72.0	22.9
-71.5	23.7
-71.0	24.5
-70.5	25.3
-70.0	26.1
-69.5	26.9
-69.0	27.8
-68.5	28.7
-68.0	29.6
-67.5	30.5
-67.0	31.4
-66.5	32
-66.0	33
-65.5	34
-65.0	36
-64.5	37
-64.0	38
-63.5	39
-63.0	40
-62.5	41
-62.0	42
-61.5	44
-61.0	45
-60.5	46
-60.0	48
-59.5	49
-59.0	50
-58.5	52
-58.0	53
-57.5	55
-57.0	56
-56.5	58
-56.0	59
-55.5	61
-55.0	63
-54.5	64
-54.0	66
-53.5	68
-53.0	69
-52.5	71
-52.0	73
-51.5	75
-51.0	77
-50.5	79
-50.0	81
-49.5	83
-49.0	85
-48.5	87
-48.0	90
-47.5	92
-47.0	94
-46.5	96
-46.0	99
-45.5	101
-45.0	104
-44.5	106
-44.0	109
-43.5	111
-43.0	114
-42.5	117
-42.0	119
-41.5	122
-41.0	125
-40.5	128
-40.0	131
-39.5	134
-39.0	137
-38.5	140
-38.0	143
-37.5	147
-37.0	150
-36.5	153
-36.0	157
-35.5	160
-35.0	164
-34.5	167
-34.0	171
-33.5	175
-33.0	178
-32.5	182
-32.0	186
-31.5	190
-31.0	194
-30.5	198
-30.0	202
-29.5	206
-29.0	211
-28.5	215
-28.0	220
-27.5	224
-27.0	229
-26.5	233
-26.0	238
-25.5	243
-25.0	248
-24.5	252
-24.0	257
-23.5	263
-23.0	268
-22.5	273
-22.0	278
-21.5	284
-21.0	289
-20.5	295
-20.0	300
-19.5	306
-19.0	312
-18.5	318
-18.0	324
-17.5	330
-17.0	336
-16.5	342
-16.0	348
-15.5	355
-15.0	361
-14.5	368
-14.0	374
-13.5	381
-13.0	388
-12.5	395
-12.0	402
-11.5	409
-11.0	416
-10.5	423
-10.0	431
-9.5	438
-9.0	446
-8.5	454
-8.0	461
-7.5	469
-7.0	477
-6.5	485
-6.0	494
-5.5	502
-5.0	510
-4.5	519
-4.0	527
-3.5	536
-3.0	545
-2.5	554
-2.0	563
-1.5	572
-1.0	581
-0.5	591
0.0	600
0.5	610
1.0	620
1.5	630
2.0	640
2.5	650
3.0	660
3.5	670
4.0	681
4.5	691
5.0	702
5.5	713
6.0	724
6.5	735
7.0	746
7.5	757
8.0	769
8.5	780
9.0	792
9.5	804
10.0	816
10.5	828
11.0	840
11.5	853
12.0	865
12.5	878
13.0	890
13.5	903
14.0	916
14.5	930
15.0	943
15.5	956
16.0	970
16.5	984
17.0	998
17.5	1012
18.0	1026
18.5	1040
19.0	1055
19.5	1070
20.0	1084
20.5	1099
21.0	1115
21.5	1130
22.0	1145
22.5	1161
23.0	1177
23.5	1193
24.0	1209
24.5	1225
25.0	1241
25.5	1258
26.0	1275
26.5	1291
27.0	1308
27.5	1326
28.0	1343
28.5	1361
29.0	1378
29.5	1396
30.0	1414
30.5	1433
31.0	1451
31.5	1470
32.0	1489
32.5	1508
33.0	1527
33.5	1546
34.0	1566
34.5	1585
35.0	1605
35.5	1625
36.0	1646
36.5	1666
37.0	1687
37.5	1708
38.0	1729
38.5	1750
39.0	1771
39.5	1793
40.0	1815
40.5	1837
41.0	1859
41.5	1881
42.0	1904
42.5	1927
43.0	1950
43.5	1973
44.0	1997
44.5	2020
45.0	2044
45.5	2069
46.0	2093
46.5	2117
47.0	2142
47.5	2167
48.0	2192
48.5	2218
49.0	2244
49.5	2270
50.0	2296
50.5	2322
51.0	2349
51.5	2376
52.0	2403
52.5	2430
53.0	2458
53.5	2486
54.0	2514
54.5	2542
55.0	2571
55.5	2599
56.0	2629
56.5	2658
57.0	2688
57.5	2717
58.0	2748
58.5	2778
59.0	2809
59.5	2840
60.0	2871
60.5	2903
61.0	2935
61.5	2967
62.0	2999
62.5	3032
63.0	3065
63.5	3098
64.0	3132
64.5	3166
65.0	3200
65.5	3235

R-404A Liquid

Temp    Pressure
deg C   kPa
-92.0	5.8
-91.5	6.0
-91.0	6.2
-90.5	6.5
-90.0	6.8
-89.5	7.0
-89.0	7.3
-88.5	7.6
-88.0	7.9
-87.5	8.2
-87.0	8.5
-86.5	8.9
-86.0	9.2
-85.5	9.6
-85.0	9.9
-84.5	10.3
-84.0	10.7
-83.5	11.1
-83.0	11.5
-82.5	12.0
-82.0	12.4
-81.5	12.8
-81.0	13.3
-80.5	13.8
-80.0	14.3
-79.5	14.8
-79.0	15.3
-78.5	15.9
-78.0	16.4
-77.5	17.0
-77.0	17.6
-76.5	18.2
-76.0	18.8
-75.5	19.4
-75.0	20.1
-74.5	20.7
-74.0	21.4
-73.5	22.1
-73.0	22.9
-72.5	23.6
-72.0	24.4
-71.5	25.2
-71.0	26.0
-70.5	26.8
-70.0	27.7
-69.5	28.5
-69.0	29.4
-68.5	30
-68.0	31
-67.5	32
-67.0	33
-66.5	34
-66.0	35
-65.5	36
-65.0	37
-64.5	39
-64.0	40
-63.5	41
-63.0	42
-62.5	43
-62.0	45
-61.5	46
-61.0	47
-60.5	48
-60.0	50
-59.5	51
-59.0	53
-58.5	54
-58.0	56
-57.5	57
-57.0	59
-56.5	60
-56.0	62
-55.5	64
-55.0	65
-54.5	67
-54.0	69
-53.5	71
-53.0	72
-52.5	74
-52.0	76
-51.5	78
-51.0	80
-50.5	82
-50.0	84
-49.5	86
-49.0	89
-48.5	91
-48.0	93
-47.5	95
-47.0	98
-46.5	100
-46.0	102
-45.5	105
-45.0	107
-44.5	110
-44.0	113
-43.5	115
-43.0	118
-42.5	121
-42.0	124
-41.5	126
-41.0	129
-40.5	132
-40.0	135
-39.5	138
-39.0	142
-38.5	145
-38.0	148
-37.5	151
-37.0	155
-36.5	158
-36.0	161
-35.5	165
-35.0	169
-34.5	172
-34.0	176
-33.5	180
-33.0	184
-32.5	187
-32.0	191
-31.5	195
-31.0	199
-30.5	204
-30.0	208
-29.5	212
-29.0	216
-28.5	221
-28.0	225
-27.5	230
-27.0	235
-26.5	239
-26.0	244
-25.5	249
-25.0	254
-24.5	259
-24.0	264
-23.5	269
-23.0	274
-22.5	279
-22.0	285
-21.5	290
-21.0	296
-20.5	301
-20.0	307
-19.5	313
-19.0	319
-18.5	325
-18.0	331
-17.5	337
-17.0	343
-16.5	349
-16.0	356
-15.5	362
-15.0	369
-14.5	375
-14.0	382
-13.5	389
-13.0	396
-12.5	403
-12.0	410
-11.5	417
-11.0	424
-10.5	432
-10.0	439
-9.5	447
-9.0	454
-8.5	462
-8.0	470
-7.5	478
-7.0	486
-6.5	494
-6.0	503
-5.5	511
-5.0	519
-4.5	528
-4.0	537
-3.5	546
-3.0	554
-2.5	563
-2.0	573
-1.5	582
-1.0	591
-0.5	601
0.0	610
0.5	620
1.0	630
1.5	640
2.0	650
2.5	660
3.0	670
3.5	681
4.0	691
4.5	702
5.0	713
5.5	723
6.0	734
6.5	746
7.0	757
7.5	768
8.0	780
8.5	791
9.0	803
9.5	815
10.0	827
10.5	839
11.0	852
11.5	864
12.0	877
12.5	889
13.0	902
13.5	915
14.0	928
14.5	942
15.0	955
15.5	969
16.0	982
16.5	996
17.0	1010
17.5	1024
18.0	1039
18.5	1053
19.0	1068
19.5	1082
20.0	1097
20.5	1112
21.0	1127
21.5	1143
22.0	1158
22.5	1174
23.0	1190
23.5	1206
24.0	1222
24.5	1238
25.0	1255
25.5	1271
26.0	1288
26.5	1305
27.0	1322
27.5	1339
28.0	1357
28.5	1374
29.0	1392
29.5	1410
30.0	1428
30.5	1447
31.0	1465
31.5	1484
32.0	1503
32.5	1522
33.0	1541
33.5	1560
34.0	1580
34.5	1600
35.0	1620
35.5	1640
36.0	1660
36.5	1681
37.0	1701
37.5	1722
38.0	1743
38.5	1764
39.0	1786
39.5	1808
40.0	1829
40.5	1852
41.0	1874
41.5	1896
42.0	1919
42.5	1942
43.0	1965
43.5	1988
44.0	2012
44.5	2035
45.0	2059
45.5	2083
46.0	2108
46.5	2132
47.0	2157
47.5	2182
48.0	2207
48.5	2233
49.0	2259
49.5	2285
50.0	2311
50.5	2337
51.0	2364
51.5	2391
52.0	2418
52.5	2445
53.0	2472
53.5	2500
54.0	2528
54.5	2557
55.0	2585
55.5	2614
56.0	2643
56.5	2672
57.0	2702
57.5	2732
58.0	2762
58.5	2792
59.0	2823
59.5	2854
60.0	2885
60.5	2916
61.0	2948
61.5	2980
62.0	3012
62.5	3045
63.0	3078
63.5	3111
64.0	3145
64.5	3178
65.0	3213
65.5	3247

Trade Name	Suva HP62 Atochem FX-70
Components	R-125 143a 134a 44% 52% 4%
Type	HFC
Replaces	R-502
Application	low and medium temperature
Oil	POE
AHRI GUIDELINE N-1995 colour assignment orange
ODP	0
GWP	3932
Phase Down Date	Kigali Amendment 85% by 2036
ASHRAE Classification