Dometic 3109228.001 User Manual

6
13. AMBIENT SENSOR
The ambient sensor is the outside air temperature sensor
and used on heat pumps only. This device allows the heat
pump to operate down to 30
o
F.
To check the ambient sensor, first measure the outside
temperature near the sensor. Unplug the sensor (red plug)
from the AC power module board. Using an ohmmeter,
check the ohms through the ambient sensor on the wire
side of the plug. See figure 10.
The temperature reading taken near the ambient sensor
should correspond to the readings on the chart below:
TEMPERATURE OHM READING
55
o
F 11667
60
o
F 10212
65
o
F 8959
70
o
F 7876
75
o
F 6939
80
o
F 6126
85
o
F 5418
90
o
F 4802
95
o
F 4264
100
o
F 3793
Note: Any ohms reading has a tolerance of plus or minus
10% to be a good component. A very precise and accu-
rate ohmmeter must be used before replacing the
ambient sensor.
12. COLD CONTROL
(Low Temperature Protection Device)
The cold (freeze) control is used on both air conditioners
and heat pumps. When the temperature of the coil reaches
the freezing point the compressor will stop operation and
the fan will automatically go to high speed.
The cold control is a thermistor and senses the coil tem-
perature. Check continuity through the sensor and compare
it to the chart below. Any variation requires the sensor to be
replaced. See Figures 10, 10A & 10B
TEMPERATURE OHM READING
25
o
F 27271
30
o
F 23528
35
o
F 20348
40
o
F 17642
45
o
F 15334
50
o
F 13360
55
o
F 11667
Note: Any ohms reading has a tolerance of plus or minus
10% to be a good component. A very precise and accu-
rate ohmmeter must be used before replacing the cold
control. Never use a cold control designed to operate
with a different control system.
GROMMET
REMOTE SENSOR
White
FREEZE
CONTROL
Blue
OUTDOOR
AMBIENT
SENSOR
Red
MODE
FAN
UP
DOWN
OFF ON
MODE OFF
Comfort Control
™
ZONE
ZONE 1
TEMP
Liquid
Crystal
Display
Mode
Selector
Button
Fan Speed
Selector
Button
Temperature
Selector
Button
Zone and
Stage
Switch
On/Off
Switch
FIG. 10
FIG. 11
Freeze Control with
wires to the right side
Remove
Hang
Ta g
Insert Freeze
Control Sensor
at a slight angle
between bottom
coil approximately 1”
Freeze control
sensor
Bend fins over
sensor to hold
in place
Freeze Control with wires.
Do
kdkd
mfmf
Remove
Hang
Tag
Insert Freeze Control
Sensor at a slight angle
between bottom coil
approximately 1”
Bend fins over
sensor to hold
in place
Freeze control
sensor
FIG. 10A
FIG. 10B
600, 620 & 630
SERIES UNITS
579, 591 & 595
SERIES UNITS
Manual Compliments of
Northwest RV Supply
Printed From
http://www.nwrvsupply.com

Dometic 3109228.001 Specifications

General

Brand	Dometic
Model	3109228.001
Category	Air Conditioner
Language	English