Dometic BRISK AIR Duo-Therm 59516.33 Series User manual

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DIAGNOSTIC SERVICE MANUAL
ROOF TOP AC/HP SYSTEMS
TROUBLESHOOTING
USA
SERVICE OFFICE
Dometic Corporation
2320 Industrial Parkway
Elkhart, IN 46516
574-294-2511
CANADA
Dometic Distribution
46 Zatonski Unit 3
Brantford, Ontario
CANADA N3T 5L8
519-720-9578
Form No. 3311071.000 08/07
©2007 Dometic Corporation
LaGrange, IN 46761
MECHANICAL CONTROL
COMFORT CONTROL
ANALOG CONTROL
3311071.000

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SAFETY INSTRUCTIONS
This manual has safety information and instruc-
tions to help users eliminate or reduce the risk
of accidents and injuries.
RECOGNIZE SAFETY INFORMATION
This is the safety-alert symbol. When you see this
symbol in this manual, be alert to the potential
for personal injury.
Follow recommended precautions and safe op-
erating instructions.
UNDERSTAND SIGNAL WORDS
A signal word , WARNING OR CAUTION is used
with the safety-alert symbol. They give the level
of risk for potential injury.
Indicates a potentially hazard-
ous situation which, if not avoided, could result
in death or serious injury.
Indicates a potentially hazard-
ous situation which, if not avoided may result in
minor or moderate injury.
When used without the safety
alert symbol indicates, a potentially hazardous
situation which, if not avoided may result in prop-
erty damage.
Read and follow all safety information and in-
structions.
Foreword
This service manual is the result of the dedica-
tion of The Dometic Corporation Technical staff
and its engineers in giving service people the
necessary instruction for making accurate analy-
ses of certain conditions. Provided is a diagnos-
tic chart leading a qualied mechanic into the
service manual pages to locate and solve symp-
toms which may occur. Dometic has continued
its commitment in providing service people with
this, the most up-to-date information about ser-
vicing Dometic RV accessories.

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PAGE NO.
Diagnostic Flow Chart ............................................................. 4
CONTENTS
Section 1
Operation
1.1 Mechanical Controls ................................................................................. 9
1.2 Analog Controls ........................................................................................ 9
1.3 Comfort Control Center .......................................................................... 10
Section 2
AC Power Requirements
2.1 AC Voltage ............................................................................................... 13
2.2 Breaker..................................................................................................... 13
2.3 Unit Wiring ............................................................................................... 13
2.4 Field Wiring.............................................................................................. 16
Section 3
DC Voltage Requirements (Electronic)............................................................ 16
Section 4
Components
4.1 Mechanical Selector Switch ................................................................... 16
4.2 Mechanical Thermostat .......................................................................... 16
4.3 Change Over Thermostat (59146.XXX).................................................. 17
4.4 Analog Thermostat ................................................................................. 18
4.5 Comfort Control Thermostat.................................................................. 18
4.6 Cable Assembly....................................................................................... 19
4.7 Analog Power Module............................................................................. 19
4.8 Comfort Control Power Module ............................................................. 20
4.9 Start Device ............................................................................................. 21
4.9.1 PTCR ........................................................................................................ 21
4.9.2 Start Relay ............................................................................................... 22
4.10 Capacitors................................................................................................ 22
4.10.1Run Capacitors........................................................................................ 22
4.10.2Start Capacitors ...................................................................................... 22
4.11 Blower Motor ........................................................................................... 23
4.12 Compressor ............................................................................................. 23
4.13 Heat Strips ............................................................................................... 23
4.13.1Heat Strip Ducted .................................................................................... 24
4.13.2Heat Strip ADB......................................................................................... 24
4.15 Comfort Control Temperature Sensors................................................. 24
4.15.1Remote Temperature Sensor ................................................................. 24
4.15.2Cold (freeze) Control Sensor ................................................................. 25
4.15.3Ambient Temperature Sensor ................................................................ 25
4.16 Analog Cold (freeze) Control ................................................................. 25
4.16 Reversing Valve (HEAT PUMP) .............................................................. 26
Section 5
Air Flow
5.1 User Maintenance and Operation ......................................................... 26
5.2 Frost on Coil ............................................................................................ 26
5.3 Recirculation, Obstructions, Restrictions ............................................ 26
5.4 Air Distribution Box (ADB) ..................................................................... 29

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PAGE NO.
CONTENTS
Section 6
Conguration ..................................................................................................... 29
Section 7
Thermostat Location ......................................................................................... 30
Section 8
Other
8.1 Ambient Temperature ............................................................................. 31
8.2 Heat Gain ................................................................................................. 31
8.3 Blower Fan/Wheel Noise ........................................................................ 31
8.4 Water Leakage......................................................................................... 31
8.5 Temperature Across Coil........................................................................ 33
8.6 Amp Draw ................................................................................................ 33
8.7 Wiring ....................................................................................................... 33
8.8 Short Cycle .............................................................................................. 40
Section 9
Quick Tips
9.1 Mechanical Control ................................................................................. 41
9.2 Comfort Control ...................................................................................... 41
9.3 Analog Control ........................................................................................ 41
PRINCIPLES OF HEAT PUMP OPERATION .......................................... 42

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SYMPTOM CAUSE PAGE #
1. Unit does not run; no fan no compressor
Mechanical Control Operation
AC Voltage
Breaker
Changeover Thermostat
Selector Switch
Wiring
09
13
13
17
16
33
Analog Control Operation
Ambient Temperature
AC Voltage
DC Voltage
Breaker
Changeover Thermostat
Analog Thermostat
Analog Power Module
Wiring
09
31
13
16
13
17
17
19
33
Comfort Control Conguration
Operation
Ambient Temperature
AC Voltage
DC Voltage
Breaker
Cable Assembly
Ambient Sensor
Remote Temperature Sensor
Comfort Control Power Module
29
10
31
13
16
13
19
25
24
20
2. Fan operates; no compressor
Mechanical Control Wiring
Selector Switch
Mechanical Thermostat
Overload
Compressor
33
16
16
23
23
Analog Control Operation
Wiring
Breaker
Analog Thermostat
Analog Power Module
Overload
Compressor
09
33
13
17
19
23
23
Comfort Control Operation
DC Voltage
Wiring
Cable Assembly
Comfort Control Power Module
Overload
Compressor
Comfort Control Thermostat
10
16
33
19
20
23
23
18
3. Fan Operates; compressor tries to start, cycles
“OFF” and hums again, or blows circuit
Mechanical Control AC Voltage
Start Device
Start Capacitor
Run Capacitor
Overload
Compressor
13
21
22
22
23
23