Trane 4TWL6036A1000A Service Facts page 11

Table 1. Defrost Control Thermistor Table
TEMP °F TEMP °C
-15.00 -26.11
-10.00 -23.33
-5.00 -20.56
0.00 -17.78
5.00 -15.00
10.00 -12.22
15.00 -9.44
20.00 -6.67
25.00 -3.89
30.00 -1.11
35.00 1.67
40.00 4.44
45.00 7.22
50.00 10.00
55.00 12.78
60.00 15.56
65.00 18.33
70.00 21.11
75.00 23.89
80.00 26.67
85.00 29.44
90.00 32.22
95.00 35.00
100.00 37.78
105.00 40.56
110.00 43.33
115.00 46.11
120.00 48.89
125.00 51.67
130.00 54.44
135.00 57.22
Example:
Sensor temp. = 19°F
Measured Resistance = 46K ohms
This sensor is good since the measured value is
relatively close to the chart value.
4TWL6036A-SF-1F-EN
THERMISTOR
RESISTANCE
Volts DC
(OHMS)
135976 2.50
115112 2.40
97745 2.29
83247 2.17
71108 2.05
60916 1.93
52333 1.81
45076 1.69
38927 1.56
33703 1.45
29253 1.33
25452 1.22
22198 1.12
19405 1.02
17002 0.93
14930 0.85
13138 0.77
11586 0.70
10238 0.63
9065 0.57
8043 0.52
7150 0.47
6368 0.42
5682 0.38
5079 0.35
4548 0.31
4079 0.28
3665 0.26
3298 0.23
2972 0.21
2683 0.19
Table 2. DEMAND DEFROST QUICK SPECS
COMPRESSOR
MNEMONIC NO
CNT
GROUP NOMENCLATURE (a)
SUPERSEDURE
CNT
OD FAN TYPE – PSC/ECM
DEFROST ENABLED: Y = ON
COIL TEMPERATURE
DEFROST PERMIT: Y = ON
COIL TEMPERATURE
MIN DEFROST TIME (MINUTES)
TARGET DEFROST TIME
(MINUTES)
MAX TIME OVERRIDE (MINUTES
+)
DEFROST TERMINATE COIL
TEMPERATURE (Factory Setting)
DEFROST HI TERMINATE COIL
TEMPERATURE (Cut Jumper 2)
SOV SWITCH-OVER DELAY
AFTER DEFROST TERM.
(SECONDS)
DEFEAT SWITCH-OVER DELAY
(SECONDS) (Cut Jumper 1)
LOW AMBIENT HEAT PUMP LOCK
OUT
LOW AMBIENT HEAT PUMP
RESUME
LPCO INPUT TO CONTROL
LPCO BYPASS IN/OUT DEFROST
(MINUTES)
(a) GROUP suffix for drawing number D
(b) ≤ (EQUAL OR LESS THAN)
Table 3. LED FAULT CODES
LED
FAULT FAULT DESCRIPTION
CODES
Ambient Temp Sensor is out
1 FLASH
of range (open/shorted)
Coil Temp Sensor is out of
2 FLASH
range (open/shorted)
Low Pressure Switch is open
3 FLASH
Hard Lock Out (can only be
cleared with a low voltage
4 FLASH
power cycle)
D D e e f f r r o o s s t t C C o o n n t t r r o o l l
SCROLL SCROLL
CNT08177 CNT08176
D161244G01 D161246G02
07824 07825
PSC ECM
1-SPD 1-SPD
≤52 °F (b) ≤52 °F
≤32 °F ≤32 °F
1 1
4 4
15 15
47°F 47°F
70° F 70°F
12 12
0 0
-12°F -12°F
-3 -3
YES YES
3 3
DEFROST
CONTROL
BEHAVIOR
Initiate defrost after
every 60 minutes of
runtime. Defrost will
terminate on coil
temp. See Note 1 & 2.
Initiate a 15 minute
forced defrost after
every 60 minutes of
runtime. See Note 1 &
2.
3 flash goes away
when/if LPCO closes.
th
Occurs after 9 trip
of LPCO. See Note 6.
11