SERVICE TIPS
81 Dometic
AMES/AES/ROYALE/ELlTE
REFRIGERATORS
Models
SILHOUETTE
AMES/AES
S1521
S1531
S1621
S1631
S1821
S1831
DOMETIC
AMES/AES
RM2607
RM2611
RM2807
RM2811
RM3607
RM3807
Refrigerator Start-Up Information
The new Dometic Refrigerator has been designed to
provide more cooling power than ever before
surpassing all agency requirements and customer
expectations. When starting this refrigerator for the
very first time, the cooling cycle may require up to
four hours of running time before the cooling unit is
fully operational.
DOMETIC
ROYALE
RM3662
RM3663
RM3862
RM3863
DOMETIC
ELITE
RM4872
RM4873
-
OS1662 3/97
1997 The
Dometic
Corporation
THE MOST COMMON SYSTEM PROBLEMS ASSOCIATED WITH THE
S1521, S1531,
S1621, S1631, S1821, S1831, RM2607, RM2611, RM2807,
RM2811, RM3607, RM3807, RM3662, RM3663, RM3862, RM3863, RM4872
and RM4873 REFRIGERATORS.
SYMPTOM
1.
No operation - no panel lights
2.
No operation - has panel lights
3.
No AC operation - operates on other mode(s)
4.
No DC operation - operates on other mode(s)
CAUSE
Operation
DC Volts
Fuse
Wiring
Upper Circuit Board
Lower Circuit Board
Operation
DC Volts
Thermistor
Fuses
Upper Circuit board
Wiring
Lower Circuit Board
Operation
AC Volts
Fuse
Heating Element
Upper Circuit Board
Wiring
Lower Circuit Board
Operation
DC Volts
Fuse
Heating Element
Upper Circuit Board
Wiring
Lower Circuit Board
5.
No gas operation - operates on other mode(s)
6.
Insufficient cooling on all mode(s).
Operation
LP Gas
Manual Gas Valve
Igniter
High Voltage Cable
Electrode
Solenoid
Upper Circuit Board
Wiring
Lower Circuit Board
Ventilation
Leveling
Ambient Temperature
Air Leaks
Thermistor
Cooling Unit
Thermistor Adjuster
SYMPTOM
CAUSE
7.
Insufficient cooling on AC
Insufficient cooling on DC - cools properly on other mode(s)
8.
9.
Insufficient cooling on gas - cools properly on other mode(s)
10.
Freezes
11. Changes preset mode
- cools
properly on other mode(s)
AC Volts
Heating Element
Lower Circuit Board
DC Volts
Heating Element
Wiring
Lower Circuit Board
LP gas
Orifice
Flue Baffle
Flue Tube
Flue Cap (if equipped)
Burner
Lower Circuit Board
Thermistor
Thermistor Adjuster
Lower Circuit Board
Upper Circuit Board
Operation
DC Volts
Wiring
Upper Circuit Board
Lower Circuit Board
12. Check light on
13. Interior light on when door is closed
14. Rapid formation of frost
15. Water on frame
DC Volts
Wiring
LP Gas
Manual Gas Valve
Solenoid
Orifice
Burner
Lower Circuit Board
Thermocouple
Wiring
Door Switch
Door Position
Food Storage
Interior Liner to Frame
High Humidity
Air Leaks
Interior Liner to Frame
High Humidity
Air Leaks
Climate Control Heater
ICE MAKER SECTION
SYMPTOM
16. Ice Maker fails to start.
17. Ice Maker won’t make ice.
18. Keeps making ice and won’t shut off.
19. Not making enough ice.
20. Too much water is coming out.
21. Ejector blade frozen into ice cubes.
CAUSE
Operation
Arm in Up Position
AC Voltage
Water Valve
Ice Maker Cycle
Blades Frozen in Ice
AC Voltage
Water Valve
Ice Maker Cycle
Shut-off arm
Operation
Mold Thermostat
Cube Size
Ice Maker Cycle
Water Fill Adjustment
Water Valve
Water Fill Adjustment
Water Valve
22. Unit is hooked-up no water comes in.
23. Ice maker is running but won’t make cubes.
24. Ice maker will not make ice.
Water
Water Valve
Water
Shut-Off Arm
Mold Thermostat
Hold Switch
Ice Ejector
Mold Heater
Timing Motor
AMES REFRIGERATOR OPERATION
2-WAY DISPLAY PANEL
3-WAY DISPLAY PANEL
MODELS INCLUDE:
AUTO MODE
When operating in the AUTO mode, the AUTO mode indicator lamp (D) will illuminate. The control
system will automatically select between AC and GAS operation with AC having priority over GAS.
Either the AC indicator lamp (B) or the GAS indicator lamp (C) will illuminate depending on the energy
source selected by the control system. If the control system is operating with AC energy and it then
becomes unavailable, the system will automatically switch to GAS. As soon as AC becomes available
again, the control will switch back to AC regardless of the status of GAS operation.
GAS MODE
When operating in the GAS mode, the AUTO mode indicator lamp (D) will not be illuminated. This mode
provides LP gas operation only. The control system will activate the ignition system and will attempt to
light the burner for a period of approximately 45 seconds. If unsuccessful, the CHECK indicator lamp (E)
will illuminate and the GAS mode indicator lamp (C) will turn off.
To restart GAS operation, press the main power ON/OFF button (1) to the OFF and then ON position.
The control system will attempt a new 45 second ignition sequence. If the refrigerator has not been used
for a long time or the LP tanks have just been refilled, air may be trapped in the supply lines. To purge
the air from the lines may require resetting the main power ON/OFF button (1) three or four times. If
repeated attempts fail to start the LP gas operation, check to make sure that the LP gas
supply tanks are not empty and all manual shutoff valves in the lines are open.
S1521,
S1531,
S1621,
S1631,
S1821, S1831,
RM2607,
RM2611,
RM2807,
RM2811
If the control is switched to AC or DC operation while the CHECK indicator lamp is on, it will function
properly, but the CHECK indicator lamp will not go off until the main power ON/OFF button is pressed to
the OFF then ON position.
DC MODE
(3-Way
Models Only)
When operating in the DC mode, the DC mode indicator lamp (A) will be illuminated. All other mode
lamps will be off. The DC mode overrides all other operating modes. If one of the other operating modes
is desired, the DC selector button (2) must be in the UP (OFF) position.
SPECIAL FEATURES OF OPERATION
This control system contains a feature where it will continue to operate the cooling system in the event
of a failure of a major operating component. Two different modes of operation can occur in this category.
If the display module becomes nonfunctional, the control system will revert to full automatic operation
(3-way
selecting the best energy source available with AC, DC
only) and GAS priority. The temperature
of the refrigerator will be maintained at the MID position within normal temperature tolerances. The
power module will continually attempt to reestablish operation of the display module.
The second Special Feature of operation will execute when a failure of the temperature sensing device or
associated electronic circuitry occurs. If this should occur, the control system will operate on the energy
source selected via the control panel. The cooling unit will run continuously on the selected energy
source. The refrigerator will continue to operate in this mode indefinitely or until a new sensor is installed
and the system is reset.
o
NOTE: The operational range of these refrigerators is 46
to 35o
*
3°F.
AES REFRIGERATOR OPERATION
Models Include: RM3607 and RM3607
AES MODE
3-WAY AES DISPLAY PANEL
The AES mode of operation takes priority over all other operating modes. If more than one mode selector
(2),
button
(3) or (4) is in the down position, the priority is from left to right.
When operating in the AES mode, the AES mode indicator lamp (A) will illuminate. In this mode the
control system will automatically select the energy source with AC having top priority, DC second priority
and GAS third priority. If the control system has selected a particular energy source such as AC, and then
it becomes unavailable, it will automatically seek out the next available energy source.
AC/GAS MODE
When operating in the AC/GAS mode the AC/GAS mode indicator lamp (B) will illuminate. In this mode of
operation the control system will automatically select between the AC and GAS energy sources with AC
having first priority.
GAS MODE
When operating in the GAS mode, the mode indicator lamp (E) will illuminate.
The GAS mode provides LP gas operation only. The control system will activate the ignition system and
will attempt to light the burner for a period of approximately 45 seconds. If unsuccessful, the CHECK
indicator lamp (G) will illuminate and the gas mode indicator lamp (C) will turn off.
To restart GAS operation, press the main power ON/OFF button (1) to the OFF and then ON position.
The control system will attempt a new 45 seconds ignition
sequence.
If the refrigerator has not been used for a long time or the LP tanks have just been refilled, air may be
trapped in the supply lines. To purge the air from the lines may require resetting the main power ON/OFF
button (1) three or four times. If repeated attempts fail to start the LP gas operation, check to make sure
that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open.
If the control is switched to the AES or AC/GAS mode of operation while the CHECK indicator lamp is on,
it will function properly on AC or DC, but if the CHECK indicator lamp is on, it will not go off until the main
power ON/OFF button is pressed to the OFF then ON position.
BATTERY
PROTECTION SYSTEM
The control system is equipped with a battery protection system. If AC power is not available, the control
will switch to the DC energy source. If the input voltage at the terminal block connections is below 12.8
volts, the control system will bypass the DC energy source and attempt GAS operation, If the GAS
energy source is available, CHECK lamp is on, the control system will return to the DC energy source.
The control will operate in the DC mode for a maximum of 10 minutes.
If the input voltage has not returned above 12.8 volts within this time, the control will terminate DC
operation and turn off the DC lamp (F) and start gas operation if GAS energy source is available and
check light is not on.
The input battery voltage must rise above 12.8 volts for 25 minutes before DC operation can resume.
As soon as the input voltage rises above the required 12.8 volts, the DC mode lamp (F) will illuminate;
however, the control system will remain in the 25 minute delay mode and operate on gas. This delay is
to allow sufficient time for the vehicle charging system to recharge the battery. If 120 volt AC becomes
available during the 25 minute delay, the control will automatically switch energy source.
SPECIAL FEATURES OF OPERATION
This control system contains a feature where it will continue to operate the cooling system in the event
of a failure of a major operating component. Two different modes of operation can occur in this category.
If the display module becomes nonfunctional, the control system will revert to full automatic operation
selecting the best energy source available with AC, DC and GAS priority. The temperature of the
refrigerator will be maintained at the MID position within normal temperature tolerances. The power
module will continually attempt to reestablish operation of the display module.
The second Special Feature of operation will execute when a failure of the temperature sensing device
or associated electronic circuitry occurs. If this should occur, the control system will operate on the
energy source selected via the control panel. The cooling unit will run continuously on the selected
energy source and could freeze. The refrigerator will continue to operate in this mode indefinitely or until
a new sensor is installed and the system is reset.
NOTE: The operational range of these refrigerators is 46°F to 35°F
*
3”.
~~~
2-WAY DISPLAY PANEL
D
3-WAY DISPLAY PANEL
B
ROYALE
MODELS INCLUDE: RM3662, RM3663, RM3662 and RM3863
AUTO MODE (P-WAY MODEL)
C
E
B C
E
F
REFRIGERATOR OPERATION
Press the AUTO mode selector button (2) to the DOWN position. If 120 volts AC is available, the AC mode
indicator lamp (B) will illuminate indicating AC operation. If 120 volts AC is not available, the GAS mode
indicator lamp (C) will illuminate and the control system will automatically switch to GAS operation.
If the CHECK indicator lamp (E) illuminates and the GAS mode indicator lamp (C) is OFF,
failed to ignite the burner in the GAS mode. GAS operation may be reset by pressing the main power ON/
OFF button (1) to the OFF then ON position. (See GAS MODE.)
Press the TEMPERATURE SELECTOR button (3) until the lamp at the desired position is illuminated.
the controls
have
GAS MODE (2-WAY MODEL)
Move the AUTO mode selector button (2) to the UP position. The GAS mode indicator lamp (C) will
illuminate. After 45 seconds the burner should be ignited and operating normally.
On the initial refrigerator start-up, it may take longer than 45 seconds to allow air to be purged from the
gas line. If the gas does not ignite within 45 seconds, the CHECK indicator lamp (E) will illuminate and the
GAS mode indicator lamp (C)will go off. To reset when the CHECK indicator lamp (E) is illuminated, press
the main power ON/OFF button (1) to the OFF and then ON position.
NOTE: DO NOT continue to reset GAS operation if the CHECK indicator lamp continues to be
illuminated after several tries.
Press the TEMPERATURE SELECTOR button (3) until the lamp (F) at the desired position is illuminated.
AUTO MODE (3-WAY MODEL)
Press the DC mode selector button (2) to the UP (OFF) position.
Move the AUTO mode selector button (3) to the DOWN position. If 120 volts AC is available, the AC
mode indicator lamp (B) will illuminate indicating AC operation. If 120 volts AC is not available, the GAS
mode indicator lamp (C) will illuminate and the control system will automatically switch to GAS operation.
If the CHECK indicator lamp (E) illuminates and the GAS mode indicator lamp (C) is off, the controls have
failed to ignite the burner in the GAS mode. GAS operation may be reset by pressing the main power ON/
OFF button (1) to the OFF then ON position. (See GAS MODE).
Press the TEMPERATURE SELECTOR button (4) until the lamp (F) at the desired position is illuminated.
GAS MODE (3-WAY MODEL)
Press the DC mode button (2) to the UP (OFF) position.
Move the AUTO mode selector button (3) to the UP position. The GAS mode indicator lamp (C) will
illuminate. After 45 seconds the burner should be ignited and operating normally.
On the initial refrigerator start-up, it may take longer than 45
gas line.
GAS mode indicator lamp (C) will go off. To reset when the CHECK indicator lamp (E) is illuminated, press
the main power ON/OFF button (1) to the OFF and then ON position.
If the gas does not ignite within 45
seconds,
the CHECK indicator lamp (E) will illuminate and the
seconds to allow air to be purged from the
NOTE: DO NOT continue to reset GAS operation if the CHECK indicator lamp continues to be
illuminated after several tries.
Press
the
TEMPERATURE SELECTOR
button (4) until the lamp (F) at the desired position is illuminated.
DC MODE (3-WAY MODEL ONLY)
Press
the DC mode indicator button (2) to the
Press the TEMPERATURE SELECTOR button (4) until the lamp (F) at the desired position is illuminated.
The refrigerator will continue to operate in the DC mode until switch (2) is moved to the UP position.
Turn off the refrigerator or move the DC selector button (2) to the UP/OFF position. The DC mode
overrides all the other operating modes. Discharging of the battery will occur if the vehicle engine
is not running.
DOWN
position. (Lamp [A] will light).
TEMPERATURE SELECTOR
The temperature selector on the refrigerator controls both the gas and electric operation, thereby
eliminating the necessity of resetting each time a different energy source is employed.
After the initial start-up, the temperature selector should be moved from “COLDEST” to the desired
temperature setting, which is usually about mid-setting.
TO SHUT OFF THE REFRIGERATOR
The refrigerator may be shut off while in any mode of operation by pressing the main power ON/OFF button
(1) to the UP (OFF) position. This shuts off all DC power to the refrigerator, including the interior light.
ELITE REFRIGERATOR OPERATION
(2-WAY)
MODELS INCLUDE: RM4872
2-WAY DISPLAY PANEL
B
CHECK COLD 1 2 3 4 5 COLDES
/
A
AUTO MODE
Press the Auto mode selector button (2) to the DOWN position. Lamp (B) will illuminate. If 120 volts is
available, the AC mode indicator lamp (A) will illuminate indicating AC operation. If 120 Volts AC is not
available, the GAS indicator lamp (C) will illuminate, indicating the control has automatically switched to
the GAS mode.
If the CHECK indicator lamp (D) illuminates and the GAS mode indicator lamp (C) is off, the controls have
failed to ignite the burner in the GAS mode. GAS operation may be reset by pressing the main power
ON/OFF button (1) to the OFF then ON position. (See Step 2 under GAS MODE). Press the
TEMPERATURE SELECTOR button (3) until the lamp at the desired position is illuminated.
I
C D’
E
GAS MODE
Move the mode selector button (2) to the UP position. The GAS mode indicator lamp (C) will illuminate.
After 45 seconds the burner should be ignited and operating normally.
On the initial refrigerator start-up, it may take longer than 45 seconds to allow air to be purged from the
gas line. If the gas does not ignite within 45 seconds, the CHECK indicator lamp (D) will illuminate and
the GAS mode indicator lamp (C) will go off.
NOTE: Do not continue to reset GAS operation if the CHECK indicator lamp continues to be illuminated
after several tries.
Press the TEMPERATURE SELECTOR button (3) until the lamp at the desired position is illuminated.
TEMPERATURE SELECTOR
The temperature selector on the refrigerator controls both the gas and electric operation, thereby
eliminating the necessity of resetting each time a different energy source is employed.
After the initial start-up, the temperature selector should be moved from “COLDEST” to the desired
temperature setting, usually about mid-setting.
TO SHUT OFF THE REFRIGERATOR
The refrigerator may be shut off while in any mode of operation by pressing the main power ON/OFF
button to the UP (OFF) position. This shuts off all DC power to the refrigerator, including the interior light.
DESCRIPTION OF OPERATING MODES
AUTO MODE
When operating in
will automatically select between AC and GAS operation with AC having priority over GAS. Either the
AC indicator lamp (A) or the GAS indicator lamp (C) will illuminate depending on the energy source
selected by the control system. If the control system is operating with AC energy and it then becomes
unavailable, the system will automatically switch to GAS. As soon as AC becomes available again, the
control will switch back to AC regardless of the status of GAS operation.
GAS MODE
When operating in the GAS mode, the AUTO mode indicator lamp (B) will be off and the GAS mode
indicator lamp (C) will be illuminated. This mode
activate the ignition system and will attempt to light the burner for a period of approximately 45 seconds.
If unsuccessful, the CHECK indicator lamp (D) will illuminate and the GAS mode indicator lamp (C) will
turn off.
To restart GAS operation, press the main power ON/OFF button (1) to the OFF and then ON position. The
control system will attempt a new 45 second ignition sequence.
If the refrigerator has not been used for a long time or the LP tanks have just been refilled, air may be
trapped in the supply lines. To purge the air from the lines may require resetting the main power ON/OFF
button (1) three or four times. If repeated attempts fail to start the LP gas operation, check to make sure
that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open.
SPECIAL FEATURES OF OPERATION
This control system contains a feature where it will continue to operate the cooling system in the event of
a failure of a major operating component. Two different modes of operation can occur in this category.
the AUTO
mode,
the AUTO
mode indicator lamp (B) will illuminate.
provides LP
gas operation only. The control system will
The control
system
If for some reason the display module becomes nonfunctional, the control system will revert to fully
automatic operation
temperature of the refrigerator will be maintained at the MID position within normal temperature tolerances.
The power module
-
selecting the best energy source available with AC and GAS priority. The
will
continually attempt to reestablish operation of the display module.
The second standby mode of operation will execute when a failure of the temperature sensing device or
associated electronic circuitry occurs. If this should occur, the control system will operate on the energy
source selected via the control panel. The cooling unit will run continuously on the selected
The refrigerator will continue to operate in this mode indefinitely or until a new sensor is installed and the
system is reset.
energy source.
ELITE REFRIGERATOR OPERATION
(39WAY)
MODELS INCLUDE: RM4873
A
6
3-WAY
DISPLAY
PANEL
C
D E
AES/AUTO MODE
The
AES/AUTO
selector button
When operating in this mode, the AES/AUTO mode indicator lamp (A) will illuminate. In this mode the
control system will automatically select the energy source with AC having top priority, DC second priority
and GAS third priority. If the control system has selected a particular energy source such as AC, and then
it becomes unavailable, it will automatically seek out the next available energy source.
Press
the
Indicator lamp (D), (E) or (F) should also illuminate indicating which energy source the control has
selected.
mode of operation takes priority over all other operating modes. If more than one mode
(2),
(3) or (4) is in the down position, the priority is from left to right.
AES/AUTO
mode selector button (2) to the DOWN position. Indicator lamp (A) should illuminate.
Press the TEMPERATURE SELECTOR button (5) until the lamp at the desired position is illuminated.
AC/GAS MODE
Press the AC/GAS mode selector button (3) to the DOWN (ON) position. Mode indicator lamp (B) should
illuminate.
In this mode of operation the control system will automatically select between the AC and GAS energy
sources with AC having first priority.
The
AES/AUTO
Indicator lamp (D) or (E) should also illuminate indicating which energy source the control has selected.
If the CHECK indicator lamp (G) illuminates, see
Press the TEMPERATURE SELECTOR button (5) until the lamp at the desired position is illuminated.
mode selector button (2) must be in the UP (OFF) position.
GAS
MODE for further instructions.
10
GAS MODE
When operating in the GAS mode, the
the UP (OFF) position.
The GAS mode provides LP gas operation only.
Press the GAS mode indicator button (4) to the DOWN (ON) position.
Indicator lamps (C) and (E) should illuminate indicating GAS operation. After45 seconds the burner should
be ignited and operating normally.
On the initial refrigerator start-up, it may take longer than 45 seconds to allow air to be purged from the
gas line. If the gas does not ignite within 45 seconds the CHECK indicator lamp (G) will illuminate and the
GAS indictor lamp (C) and (E) will go off.
To reset when the CHECK indicator lamp (G) is illuminated, press the main power ON/OFF button (1) to
the OFF then ON position.
NOTE: Do not continue to reset GAS operation if the CHECK indicator lamp continues to be illuminated
after several tries. If repeated attempts fail to start the LP gas operation, check to make sure that the LP
gas supply tanks are not empty and all manual shutoff valves in the lines are open.
Press the TEMPERATURE SELECTOR button (5) until the lamp (H) at the desired position is illuminated.
AES/AUTO
(2) and AC/GAS (3) mode selector buttons must be in
If the control is switched to the
is on, AC or DC will function properly, but the CHECK indicator lamp will not go off until the main power
ON/OFF button is pressed to the OFF then ON position.
AES/AUTO
or AC/GAS
mode of operation while
the CHECK indicator lamp
TEMPERATURE SELECTOR
The temperature selector on the refrigerator controls both the gas and electric operation, thereby
eliminating the necessity of resetting each time a different energy source is employed.
After the initial start-up, the temperature selector should be moved from “COLDEST” to the desired
temperature setting, usually about mid-setting.
TO SHUT OFF THE REFRIGERATOR
The refrigerator may be shut off while in any mode of operation by pressing the main power ON/OFF button
to the UP (OFF) position. This shuts off all DC power to the refrigerator.
DESCRIPTION OF OPERATING MODES
AES/AUTO MODE
The AES/AUTO mode of operation takes priority over all other operating modes. If more than one mode
selector button
When operating in the AES/AUTO mode, the
mode the control system will automatically select the energy source with AC having top priority, DC second
priority and GAS third priority. If the control system has selected a particular energy source such as AC,
and then it becomes unavailable, it will automatically seek out the next available energy source.
(2),
(3) or (4) is in the down position the priority is from left to right.
AES/AUTO
mode indicator lamp (A) will illuminate. In this
AC/GAS MODE
When operating in the AC/GAS mode, the AC/GAS mode indicator lamp (B) will illuminate.
this mode of operation the control system will automatically select between the AC and GAS energy
In
sources with AC having first priority.
11
GAS MODE
When operating in the GAS mode, the GAS mode indicator lamp (C) will illuminate.
The GAS mode provides LP gas operation only. The control system will activate the ignition system and
will attempt to light the burner for a period of approximately 45 seconds. If unsuccessful, the CHECK
indicator lamp (G) will illuminate and the GAS mode indicator lamp (C) will turn off.
To restart GAS operation, press the main power ON/OFF button (1) to the OFF and then ON position. The
control system will attempt a new 45 second ignition sequence.
If the refrigerator has not been used for a long time or the LP tanks have just been refilled, air may be
trapped in the supply lines. To purge the air from the lines may require resetting the main power ON/OFF
button (1) three or four times. If repeated attempts fail to start the LP gas operation, check to make sure
that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open.
If the control is switched to
AES/AUTO
or AC/GAS mode of operation while the CHECK indicator lamp is
on, it will function properly, but the CHECK indicator lamp will not go off until the main power ON/OFF button
is pressed to the OFF then ON position.
BATTERY PROTECTION SYSTEM
The control system is equipped with a battery protection system. If AC power is not available the control
will switch to the DC energy source. If the input voltage at the terminal block connections is below 12.8
volts the control system will bypass the DC energy source and attempt GAS operation. If the GAS energy
source is available,
CHECK lamp is on, the control system will return to the DC energy source. The control
will operate in the DC mode for a maximum of 10 minutes.
If the input voltage has not returned above
and turn off the DC lamp (F) and start gas operation if GAS energy
12.8volts
within this time, the control will terminate DC operation
source is available.
The input battery voltage must rise above 12.8 volts for 25 minutes before DC operation can resume.
As soon as the input voltage rises above the required 12.8 volts, the DC mode lamp (F) will illuminate.
However the control system will remain in the 25 minute DC delay mode and operate on gas. This delay
is to allow sufficient time for the vehicle charging system to recharge the battery. If 120 volt AC becomes
available during the 25 minute delay, the control will automatically switch to the AC energy source.
STANDBY MODE OF OPERATION
This control system contains a feature where it will continue to operate the cooling system in the event of
a failure of a major operating component. Two different modes of operation can occur in this category.
If for some reason the display module becomes nonfunctional, the control system will revert to fully
automatic operation
temperature of the refrigeratorwill be maintained at the MID position within normal temperature tolerances.
The power module will continually attempt to reestablish operation of the display module.
-
selecting the best energy source available with AC and GAS priority. The
12
The second standby mode of operation will execute when a failure of the temperature sensing device or
associated electronic circuitry occurs. If this should occur, the control system will operate on the energy
source selected via the control panel. The cooling unit will run continuously on the selected energy source.
The refrigerator will continue to operate in this mode indefinitely or until a new sensor is installed and the
system is reset.
AC VOLTAGE REQUIREMENTS
Proper
will not switch to another mode of operation until all AC power is lost.
Operating Range is 100 to 132 Volts.
If voltage drops below 100 volts, cooling efficiency will decrease with voltage decrease. The refrigerator
AC COMPONENTS
HEATING ELEMENT
Remove the heater leads from the lower circuit board and measure for proper resistance
You should obtain the following readings 2 10%:
MODEL WATTS VOLTS
S1521
S1531
S1621
S1631 325
S1821
S1831 325 120
RM2607 295
RM2611
185 120
195 120
325
325 120
295
120
120
120
120
OHMS
78
78
44
44
44
44
48
48
.
RM2807
RM2811
RM3607 295
RM3807
RM3662
RM3663
RM3862
RM3863
RM4872
RM4873
325 120
325 120
325 120
325
325
325 120
325 120
325
325 120
120
120
120
120
44
44
48
44
44
44
44
44
44
44
DC VOLTAGE REQUIREMENTS
The operational range of the unit is a minimum of
automatically shut down until voltage has decreased to 18V DC. The refrigerator requires at least
DC for proper operation; however the panel lights will continue to illuminate until voltage has dropped to
4V DC or below.
Do not use the body or chassis of the RV as a substitute for either of the two conductors. Proper polarity
is crucial for refrigerator operation.
9.6V
DC to a maximum of 22V DC, the unit will
9.6V
13
DC COMPONENTS
-
HEATING ELEMENT
Check the heating element with ohms resistance.
f
You should obtain the following readings
10%:
MODEL
S1531
S1621
S1631
RM2607
RM2611
RM2807
RM2811
RM3607
RM3807
RM3663
RM3863
RM4873
A continuity reading will indicate an open or complete circuit.
WATTS
215
215
215
215
215
215
215
215
215
215
215
215
VOLTS
OHMS
12
12
12
12
12
12
12
12
12
12
12
12
.67
.67
.67
.67
.67
.67
.67
.67
.67
.67
.67
.67
14
THERMISTOR
Disconnect the thermistor harness from the
P2,
2-pin
terminal on the lower circuit board.
Place a thermistor in a glass of ice water.
Wait 2 to 3 minutes. You should get a reading
of approximately 7,000 to 10,000 ohms.
THERMISTOR ADJUSTER
Do an ohms resistance check across the terminals. Proper ohms reading is approximately 23,200 ohms
f
10%.
THERMISTOR
ADJUSTER
e
TO
THER-
MISTOR
NOTE:
Dometic
thermistor adjuster. This is an add-on component.
refrigerators do not come equipped with a
SOLENOID VALVE
Check the solenoid with a properly calibrated ohm meter. Remove the connector from the solenoid and
measure the resistance across the terminals. The proper reading would be 49 ohms with tolerance
range of ten percent.
Next, hook up a manometer at the test port. Then check for DC volts at gas valve terminals while the
unit is in trial-for-ianition. If DC volts are present and pressure is low, replace the valve. If DC volts are
not present at the valve while the unit is in trial-for ianition, verify that the wire at Plug 3, Terminal 2 on
lower circuit board has DC volts (9 or more).
AMES/AES
REFRIGERATORS
ROYALE
AND ELITE
REFRIGERATORS
15
IGNITER
Verify proper voltage at the positive (+) and ground (-)
terminals of the igniter. Remove high voltage cable fro
igniter. The igniter should produce a sparking sound during
trial-for-ianition. The igniter installed on the refrigerators as
original equipment is part number 2931132019 (RV Gas
Model 679). This igniter is rated 50 MA. This igniter may
also be used on any other model.
DO NOT install the Channel Mark 6, Model 12E Igniter
(shown below) as a service replacement part.
r
MARK 6, MODEL
Installation of the Channel Products, Inc.,
refrigerator.
HIGH VOLTAGE CABLE
Disconnect high voltage cable from electrode. If sparking starts during trial-for ianition, the cable is
good.
ELECTRODE
Do a visual check for cracks or breaks on the ceramic insulator.
the electrode. The spark gap must be set at three sixteenths
above the slots in the burner.
Gasliter
Mark 6, Model 12E will VOID the Warranty on
If either of the above is found, replace
(3/16”)
of an inch and tip of electrode
12E
12VDC
CHANNEL PRODUCTS
CHESTERLAND
OH 44026
25mA
the
16
UPPER CIRCUIT BOARD
NOTE: The PAL tester will allow for proper testing of the integrity of the upper and lower circuit boards.
PAL is available from your
Dometic
parts distributor.
With main ON/OFF switch on display panel in OFF position:
Check for DC voltage at Plug 1, Terminal 4 (orange or white wire) and terminal 5 (red wire) negative (-)
DC on the lower
circuit board.
If no voltage, then check fuse condition.
UPPER CIRCUIT BOARD
RED 3
ORANGE OR WHITE 4
Check for DC voltage between J4 and
J10
terminals on the lower circuit board.
Next, check for DC voltage at the upper circuit board between terminal 4 (orange or white wire) and
terminal 3 (red) which is negative (-) DC. If no voltage, and your previous check proved voltage at the
lower circuit board between these wires, replace the cable assembly.
With main ON/OFF switch on display panel in ON position:
Check for DC volts between terminal 3, red wire (-) negative and terminal 5 (green wire) and terminal 1 (black wire). If there is no voltage, the ON/OFF switch on upper circuit board is defective.
1,
Do the same voltage test at the lower circuit board. (-) negative plug
terminal 5 (red wire), plug 1,
terminal 1 (green wire) and plug 1, terminal 3 (black wire). If there is no voltage and you had voltage
on previous test, the cable assembly is defective.
DIAGNOSTIC MODE
Access to the diagnostic sequence unit:
With the Power Switch in the OFF position, hold the Temperature Selector Switch in the DOWN position. While keeping the Temperature Selector Switch in the
DOWN position, move the main power ON/OFF Switch to the ON (DOWN) position. Hold the Tempera-
ture Selector Switch DOWN for three (3) seconds.
The Temperature Indicator Lamps are used to indicate which part of the control system is being tested.
When position
#1
is illuminated, the control is in an idle position with all output loads off.
All of the checks listed below are done on the lower circuit board.
The manual test sequence is as follows:
Position
Position
Position
#l
:
Idle Position, all loads off.
#2:
Activate AC Heater. Check for AC volts at terminals J7 and J8.
#3:
Activate Gas Solenoid. Check for DC volts at Gas Solenoid white wire
(+).
Position
Position
#4:
Activate DC heater. Check for DC volts between J1 (+) and
#5:
Activate spark ignition system. Check for DC volts to (+) terminal of igniter and ground.
J10 (-).
(-)
and yellow wire
17
If you experience a problem on any of the above checks, verify the fuses on the lower circuit board are
good.
If all checks prove to be good, and the refrigerator does not operate on electric mode, replace the lower
circuit board. It has been damaged by AC volts in excess of 180 volts.
AES DISPLAY PANEL
POWER SWITCH
ii
-(y
*cxF
OWO~
““0
CHECK
o
mLDl2346coLcEsT
00000
TEMPERATURE
SELECTOR
SWITCH
9
\
! 4
J
LOWER CIRCUIT BOARD
A. DC VOLT: ALL TESTS ARE TO BE DONE WITH THE REFRIGERATOR IN THE COOLING MODE.
Measure volts between terminal J4 and the ground strip. Voltage should be the same as at the positive
(+) and negative (-) on the terminal block.
1
18
B. AC MODE: Check that incoming AC voltage is present at terminals J5 and J6 on the circuit board. Check
for voltage at the heating element connection terminals J7 and J8 on the circuit board. If no voltage is
present, check the
5-amp
AC and
3-amp
DC fuses. If fuses are good, replace the circuit board.
C. DC MODE: Check for voltage between terminal J4 on the circuit board and the ground strip. If voltage is
12.8 volts DC or above, check for DC volts between the heating element
(J1)
connection and the ground
strip. Check the fuses and the DC heating element.
D. GAS MODE: Verify that the following components are good: upper circuit board, thermistor and 3-amp
fuse.
Check for voltage during
trial-for-ianition
at Plug 3, Terminals 1 (white wire) and 2 (yellow wire) to
the solenoid. If no voltage is present, change the circuit board.
Next, check for voltage to the igniter. If no voltage is present, check the wires. If good, then change
the circuit board.
NOTE: When millivolts to the lower circuit board are 10
*
3, the power to Plug 3, Terminal 4 (blue
wire) will be shut off. If flame extinguishes during the cooling mode, the circuit board will not supply
voltage to Plug 3, Terminal 4 (blue wire) again until the millivolts have decreased to
10*3.
To check the flame sense circuit of the lower circuit board, operate the refrigerator on GAS mode,
then measure the millivolts between J3 terminal and the other wire connection from the thermocouple.
The millivolt meter should read between 25 to 35 millivolts with the gas flame burning. Next, turn the
manual shutoff valve to OFF and watch the millivolt reading as it drops. Note the millivolt reading
when Plug 3, Terminal 4 (blue wire) receives power. It should be
101t
3 millivolts or 7 to 13.
DOOR SWITCH (Only on Models Equipped with Interior Lights)
When the switch arm is depressed, there should not be continuity. When the switch arm is
NOT
de-
pressed, there should be continuity.
FUSES
The 3 amp DC fuse is designed to protect the circuit board from internal shorts. The 5 amp AC fuse is
3-way
designed to protect the integrity of the AC heater circuit from shorts. On
models only, the 35 amp
DC fuse is designed to protect the DC heater circuit integrity.
CLIMATE CONTROL HEATER
Disconnect the wires and do a continuity check. In the
the ON position, there should be a continuity reading.
To check the heater itself, do an ohms resistance reading. The proper ohms reading is 24 ohms
OFF
position, there should be no continuity.
f
10%.
In
19
LP GAS REQUIREMENTS
The LP gas pressure to the refrigerator should be 11 inches water column with half of all BTU’s of the
RV turned on. With all other appliances off, the pressure to the refrigerator should not exceed 12 inches
water column. To check the gas pressure when the refrigerator is operating, there is a pressure test port
on the solenoid.
LP GAS COMPONENTS
MANUAL GAS SHUTOFF VALVE
To check the shutoff valve, remove and
inspect for any obstructions.
ROYALE &
ELITE
Power
Module.
Cover
Flexible Cord
AMES & AES
-
lermmal Block
.-.
Shutoff Valve
\
Gas Connection
SILHOUETTE
PRESSURE TEST PORT
/I
Test
Orifice
THERMOCOUPLE
\
MANUAL GAS SHUTOFF
(Shown in “ON” position)
V&/E
AMES & AES
SOLENOID VALVE
c
PRESSURE TEST PORT
MANUAL
GAS
sHvz~F
(Shown in
“ON” posi-
tion)
+
ORIFICE
20
ROYALE
MODELS
AND ELITE
MANUAL
SHUTOFF
VALVE
Use a quarter dollar or a slotted screwdriver
to change position
SOLENOID
VALVE
THERMOCOUPLE
PRESSURE TESTPORT
ORIFICE
The orifice is cleaned by using an alcohol based solvent and allowing to air dry.
If there is a lack of cooling on gas operation, verify the orifice is the proper size per the chart below:
S1521
S1531 #43
S1621
S1631
S1821
S1831
#43
#58
#58
#58
#58
RM2607
RM2611
RM2807
RM2811
RM3607
RM3807
#53
#53
#58
#58
#53
#58
RM3662 #58
RM3663
RM3862
RM3863 #58
RM4872 #58
RM4873 #58
L
0T;IFICE
#58
#58
THERMOCOUPLE
The thermocouple should produce 25 to 35 millivolts when connected to the lower circuit board. Any
reading below 18 millivolts could cause erratic gas operation.
BURNER
The slots in the burner should be directly below the flue tube. The burner should be cleaned periodically,
at least once a year. Soak the burner in an alcohol based solvent and allow to air dry.
FLUE BAFFLE
It should be cleaned periodically, at least once a year.
The proper position of the baffle above the burner
should be as follows:
S1521
S1531
S1621
S1631
S1821
S1831
RM3662
RM3663
RM3862
RM3863
RM4872
RM4873
2-1/4"
2-1/4"
1-5/8"
1-5/8"
1-5/8"
1-5/8"
-7/8"
-7/8"
-7/8"
-7/8"
-7/8"
-7/8"
RM2607 1-5/8"
RM2611
RM2807
RM2811
RM3607
RM3807
1-5/8"
1-3/4"
1-3/4"
1-5/8"
1-3/4"
21
FLUE CAP
(AMES/AES
MODELS ONLY)
The flue cap is located at the top of the flue tube and is attached with a screw.
FLUE TUBE
FLUE
The flue tube must be cleaned periodically, at least once a year
Clean by using a flue brush,
Dometic
Part No. 0151404001.
TUBE
WIRING
EXTERNAL WIRING
1.120 Volts AC Connection
The refrigerator is equipped with a three-prong (grounded) plug for protection against shock hazards
and should be plugged directly into a properly grounded three-prong receptacle. Do not cut or remove
the grounding prong from this plug.
2.12
Volt DC Connection
The refrigerator must be connected to the battery circuit with two wires of adequate capacity to avoid
voltage drop.
The wire gauge should be chosen in accordance with the Table shown below.
Do not use the body or chassis of the vehicle as a substitute for either of the two conductors. No other
electrical equipment or lighting should be connected to the refrigerator circuit.
MAXIMUM CONDUCTOR WIRE LENGTH IN FEET
AWG
6
10 19
12
S1521
S1531 S1631
-
I
12
I--
S1621
27 27 27
17 17
S1621 RM2607 RM2607
S1631
,_,_
RM2611
17
RM2811
RM3607 RM3607 RM3663 RM3663 RM4673
27
17
,_-
27 27 27
17
,_
17
-
RM3662 RM3662 RM4672
17
-
27
17
,_
27
17
,_
22
INTERNAL WIRING
Verify the refrigerator is wired per the wiring diagram for the exact model you are working on. See the
following typical wiring diagrams.
AMES & AES
TYPICAL 3-WAY WIRING
DIAGRAM
I I-
O_
Circuit Board Power
@ Circuit Board Display
e
Thermistor
8
Gas Valve
0 Reigniter
o_
Thermocouple
0
Electrode
@__
Retainer for Burner
0
Terminal Block
O_
Terminal Strip
0 Absorption
@-.-
Fuse 3A
@ Fuse 5A
e
Heater
@ Fuse 35A
e
Heater 12V DC
8
Fv$h
0
Heating Cable
@--
Switch
@ Terminal Block
Terminal Block
Unit
120V
AC
w
I
TYPICAL
r
Lit)-
00000’
L_-,J
AMES & AES
2-WAY
WIRING DIAGRAM
------1
Circuit Board Power
Circuit Board Display
Thermistor
Gas Valve
Reigniter
Thermocouple
Electrode
Retainer for Burner
Terminal Block
Terminal Strip
Absorption Unit
Fuse 3A
Fuse 5A
Heater 120V AC
Switch
Light
I
I
I
J
Heating Cable
Switch
Terminal Block
Terminal Block
ROYALE &
ELITE
293267500
TYPICAL
2-WAY
WIRING DIAGRAM
@--BURNER
@CHASSISGROUND
@-CIRCUIT.
@CIRCUIT BOARD
@--ELECTRODE
O-FUSE
@-FUSE
@HEATER
~~M;;:“G
J
Hous
i
NG
BOARD DISPLAY
POWER
3A
5A
120V
AC
CABLE
@--PROTECTIVE EARTH
O_REIGNITER
@--RETAINER
@SOLENO
@---SWITCH
@SWITCH LIGHT
@-TERM/
@-TEST POINT
@----THERMISTOR
@THERMOCOUPLE
I 0
NAL
VALVE
BLOCK
24
WGREY
@WHITE
@---YELLOW
ROYALE &
ELITE
293267600
0
TYPICAL
3-WAY
WIRING DIAGRAM
@-BURNER
@CHASSISGROUND
@-CIRCUIT BOARD DISPLAY
@CIRCUIT BOARD POWER
Q_ELEcTR~~E
-O-FUSE 3A
@--FUSE 5A
*@-FUSE 35A
@-HEATER
HOUSING
12v DC
*LIGHT
@PROTECTIVE
@--REIGNITER
@RETAINER
@-;;-:;;I"
&WITCH
@-TERMINAL
-TEST
Q-THERMISTOR
@-THERMOCOUPLE
LIGHT
POINT
@
EARTH
VALVE
BLOCK
LEVELING
The absorption design utilizes no mechanical pumps or compressors to circulate the refrigerant within the
system, so proper leveling must be maintained to provide the correct refrigerant flow. Without proper
leveling, refrigerant within the cooling unit will collect and stagnate at certain areas. Both
brand refrigerators have a type of cooling unit that utilizes an enclosed pump tube surrounded by a solution.
The vehicle needs to be leveled so it is comfortable to live in. When the vehicle is moving, leveling is not
critical as the rolling and pitching movement of the vehicle will pass to either side of level, keeping the
refrigerant from accumulating in the piping.
Dometic
and
Servel
25
VENTILATION
The coach vent system must be able to provide a way to direct the hot air, produced by the action of the
cooling unit, out away from the installation of the refrigerator. In a proper installation, there should be as
little open space as possible surrounding the sides and top of the refrigerator to achieve proper air flow.
0"
CLEARANCE
FROM SIDE AND
CLEARANCE
FROM
COMBUSTIBLE
MATERIALS
PATH OF
AIR FLOW
NOTE: Refrigerator should be installed in accordance with appropriate installation instructions
received with the refrigerator.
AIR LEAKS
Check the gasket on the doors to be sure of a positive air seal.
If a gasket is not sealing properly, first warm the gasket material with a hair drier. Close the door and
the magnetic strip should pull the gasket to the
metal frame. Also check that the cooling unit
is installed properly.
AMES/AES
The refrigerator is secured in the enclosure
with six screws and they must be installed in
the following order:
First Two Screws:
Installed on the front base.
Second
Installed in the top frame.
Third Two Screws:
Installed in the rear base.
MODELS:
Two Screws:
26
ROYALE
CONDENSATE WATER DRAIN HOSE: A
AND ELITE MODELS:
3/4"
hole must be drilled through the flooring in the opening
of the base plate on the rear of refrigerator.
The refrigerator is secured in the enclosure with six screws. They must be installed in the following order:
First: Two screws are installed in front decoration strip and through the front base.
A.
The front strip is to be installed after the refrigerator is set into the alcove.
B.
Install the lower front strip by sliding it under the bottom hinge plate as shown.
C.
When the front strip is in place, install one screw through the hinge and into the floor. The second
screw is installed with a washer on the opposite side.
Second: Install the two screws in the top frame.
A. The top decoration panel must be removed from the
push
the
tabs out of the hole in the hinge with a flat
B. Carefully tilt the top decoration panel and
C. Install the second two screws in the
lift
up to remove from top frame.
top
frame as shown.
refrigerator Open
blade
screwdriver.
refriaerator door and gently
27
D. Replace the top decoration panel.
Third: Two screws installed as shown in rear base.
DOOR POSITION
The door position can
be checked by observing any misalignment of the door in relation to the frame.
To adjust either door, loosen the hinge bracket screws, reposition the door then tighten the hinge bracket
screws. To adjust up or down, add or remove washers from the lower hinge pin.
AMBIENT TEMPERATURE
As the ambient temperature increases, the air temperature in the area of the cooling unit increases. The
double-door refrigerators should maintain approximately 43 degrees food storage temperature at 110
degrees ambient temperature.
COOLING UNIT
The chemicals
There are no repairs recommended on the cooling unit.
involved
in the cooling process include hydrogen, ammonia, water, and a rust inhibiting agent.
TO DIAGNOSE ALL COOLING UNITS
Models RM3662, RM3663, RM3862, RM3863, RM4872, RM4873
After four hours of operation, feel the back plate of the freezer section. It should be cold to the touch. If cold
to the touch, the unit is working.
If
after
four hours of operation the unit back plate is not cold to the touch, turn the refrigeratorto OFF; wait 1
hours and restart the refrigerator. After four hours of operation the back plate of the freezer section should
be cold to the touch. If it is not cold to the touch after the second four hours of operation, the cooling unit may
be defective.
-1/2
Verify the AC heating element is good. Then
and place a thermometer in one of the containers of water. Next, supply 115 volts direct to the AC heating
element and operate for at least 12 hours. Check the temperature on the thermometer. It should be 45 degrees
or lower, depending on test conditions.
place approximately one gallon of water inside the refrigerator
FOOD STORAGE
It is essential that the shelves are not covered with paper or large storage containers. Always remember to
allow for proper air circulation.
Odorous or highly flavored foods should always be stored in covered dishes, plastic bags, or wrapped in foil
or waxed paper to prevent food odors. Vegetables, lettuce, etc., should be covered. NEVER PUT HOT FOOD
INTO THE REFRIGERATOR.
HIGH HUMIDITY
The condensation may actually run off the frame. As the humidity is reduced, the “sweating” will decrease.
INTERIOR LINER SEAL TO FRAME
Condensation could form on the frame and could promote rapid formation of frost. Apply a small bead of
silicone all the way around the perimeter where the frame meets the interior liner.
Slide the refrigerator out approximately 2-4 inches. Apply a foil-backed adhesive tape to the joint between
outer frame and foil-backed refrigerator insulation.
NOTE: TO FORM A PROPER SEAL, IT IS IMPORTANT NOT TO LEAVE ANY GAPS.
;;XJL≶AM
PLASTIC LINER
iXGiiETAL
$zh3s3y
doors removed)
29
ICE MAKER OPERATION
The refrigerator must be allowed to
precool
properly before starting the ice maker. The refrigerator has to
be connected to 120 volts AC before the ice maker can operate. The water line manual shutoff valve must
be open. To start making ice, move the ice level bail arm to DOWN position.
ICE LEVEL BAIL ARM
DOWN POSITION
When the ice maker thermostat senses the preset temperature for ejection of the ice cubes, the fingers will
start to rotate
-
dumping any ice cubes and filling the mold with water.
When the storage container is full of ice, the ice level bail arm can not return to the DOWN position. This
will stop further production of ice until the container is emptied and the bail arm is returned to the down
position.
The absorption system will keep the compartment at the proper temperature for storage of ice. Ice
making is accelerated if the thermostat is set to the coldest position. It is a good idea to do this a few
hours before you anticipate a need for ice.
NOTE: IF THE ICE MAKER WAS CLEANED AND DRAINED, NO ICE CUBES WILL BE DUMPED
INTO THE STORAGE CONTAINER DURING THE FIRST CYCLE.
The first few cycles may have small cubes due to air trapped in the water lines. The first container of ice
tubes should be dumped if the water system has been winterized or not used for several weeks.
ICE MAKER COMPONENTS
MOLD HEATER
The mold heater uses 165 watts to thaw the ice free from the mold.
It is wired in series with the thermostat which also acts as a safety
device. You should obtain a reading of approximately 80 ohms. If
the heater is found to be defective, the manufacturer recommends
replacement of the entire ice making unit for proper operation.
ICE EJECTOR
The ice ejector blades sweep the ice from the mold cavities during the ejection cycle.
The drive end of the ejector is
“D”
shaped for positive coupling. The bearings at
both ends are lubricated with silicone grease If the ejector blades are frozen into
the ice, defrost the ice maker and manually cycle the ice making unit,
making sure the ejector stops at the right location.
(Staked in Place)
30
“D”
SHAPED
MOLD THERMOSTAT
This is a single-pole, single-throw, bimetal switch. It starts an ejection cycle by closing at 18°F
reset temperature is
5O”F* 5”.
The thermostat is in series with the mold heater and acts as a safety
against overheating in case of a mechanical failure.
THERMOSTAT
f
5”. The
SHUTOFF ARM
The shutoff arm is cam driven. It operates a switch to control the quantity of ice produced. During the
ejection cycle the arm is raised and lowered during each of the two revolutions of the timing cam. The
arm has a manual shutoff built into the linkage; by raising the arm as high as possible, it will lock in that
position until forced down.
MOLD SWITCHES
These three switches are single-pole, double-throw style. They are identical and interchangeable.
The holdina switch
The water valve switch
only adjustable component of the ice maker. If you use a double-throw switch, DO NOT use the N.O.
terminal.
The shutoff switch
when the storage bin is full.
assures completion of a revolution once a cycle has started.
opens the water valve during the fill stage of the cycle. NOTE: This is the
stops the ice maker’s operation
FRONT VIEW
MOTOR
-
TIMING CAM
WATER
VALVE
SWITCH
HOLDING
SWITCH
y
I I\\
31
TIMING MOTOR
This is a low-wattage, stall-type motor which is geared to the timing cam and ice ejector. It is a one RPM
motor.
Disconnect power to the appliance and test for continuity between the two leads.
WATER VALVE
This valve is solenoid operated. When it is open, it releases water from the source to the mold. The
amount of water is proportional to the length of time the water valve switch is held closed by its timing
cam.
Check for continuity between the two terminals. If you have continuity, the solenoid is good. It takes
1015 watts to energize the solenoid coil. The mold heater and coil are in series. When the mold heater is
activated, this causes the voltage to drop to about 105 VAC at the coil.
The valve has a flow washer inside which acts as a pressure regulator. A strainer is installed to prevent
dirt, rust, etc. from entering the valve.
WATER VALVE
VALVE BODY
STRAINER
ICE MAKER ASSEMBLY
Check each wire for continuity to make sure the wiring is good before replacing the ice maker unit,
32
OPERATION
While the operation of the ice maker is fairly simple, an understanding of its cycle is necessary for the
service technician to diagnose specific problems.
The following series of electrical schematics (on the following pages) will show a typical cycle, and the
positions of various components during the cycle: the mold and its contents, the ejector, the shutoff arm
and the storage bin.
NOTE THE RELATIVE POSITION
OF THESE COMPONENTS IN THE
FOLLOWING SCHEMATICS
EJECTOR
THERMOSTAT
NON ENERGIZED
ENERGIZED
8HlJT-OFF SWITCH
This is a freeze Cycle. The mold is
tilled with water. The thermostat is
open. All components are deenergized.
THERMOSTAT
CRCUIT-
CIRCUITS
Mou)
HEATER
After a few degrees of motor rotation,
the timing cam switches the holding
switch to its normally open position;
this assures completion of the cycle.
The mold heater remains energized
through the thermostat circuit during
the first half of the cycle the shut-off
arm is raised and lowered by the
timing cam and operates the shut-off
switch.
115VOLTS
60 CYCLE
I
-
MOLD HEATER
115VOLTS
Q,
BHUT-CFF
8WllCH
This is the start of an ejection cycle.
The thermostat switches to its closed
position after being sufficiently cooled
by the ice in the mold. The mold
heater and motor are now energized.
The ejector blades begin to turn.
60 CYCLE
THERMOSTAT
HDLDWG-
MOLD
_
I--
HEAlER
--
HOLDING
When the ejector blades reach the
ice in the mold, the motor will stall. It
will remain in this position until the ice
has thawed loose. During this time
the mold heater remains energized.
ICE
&j,
I
II
I
I
33
SHUT-OFF SWITCH
WATER
SOLENOID SWITCH
the completion of the first
Near
revolution, the timimg cam closes the
water valve switch. However, since
the thermostat is still closed the mold
heater circuit is energized. current
will not pass through the water valve
solenoid and its switch. (Electrical
current follows the path of least
resistance.)
THERMOSTAT
SHUT-OFF SWITCH
Once again after a few degrees of
rotation the timing cam closes the
holding switch providing a circuit to
ths motor that will assure completion
of this revolution. The mold heater
remains energized. The shut-off arm
will raise and lower again operating
its switch. The ice that was ejected
during the first revolution is dumped
into the storage bin.
THERMOSTAT
HOLDING SWITCH
MOLD HEATER
At the end of the first revolution the
timing cam opens the holding switch.
However, since the thermostat is still
closed a second revolution begins.
L
SHUT-OFF SWITCH
WATER
SOLENOID SWITCH
Some time during the second
revolution the mold heater resets the
thermostat. At this time, the mold
heater is de-energized if the storage
bin is full, the shut-off arm will remain
in a raised position.
THERMOSTAT
HOLDING SWITCH
MOLD HEATER
34
SHlJT-OFF SWITCH
Near the completion of the second
revolution the timing cam again
closes
the water valve switch. This
time a circuit is completed through
the water valve
and the mold heater. The water valve
solenoid received about 105 volts.
The remaining 10 volts to the mold
heater are not noticeable. When the
water valve solenoid is energized, the
valve opens and water
mold.
solenoid its switch
THERMOSTAT
HOLDING SWITCH
refills the
MOLD
HEATER
A
&
WATER
PI
A
SHUT-OFF
The ejection cycle ends the moment
that the holding switch is switched by
the timing cam. The water valve
switch is also opened. If the storage
bin is full, as shown here, additional
cycles will not start until sufficient ice
is used to lower the shut-off arm,
thus operating its switch.
SWI
MOLD HEATER
ICE MAKER - OTHER
WATER FILL ADJUSTMENT
The size of the ice cubes depends on the amount of water which enters the mold. The cubes should be
approximately
If the water overflows in the mold, first check to see if the ice maker unit is level in the appliance. Next
ensure that the appliance is installed level in the RV.
If there is still water overflow, adjustment of the water fill screw is necessary. Locate the screw on the
ice maker assembly. Turn the screw as necessary toward the
will make an
time.
If the water level is too high, it can also cause the ejector blades to become frozen in the ice. Follow the
procedures above to correct the problem.
1/2"
wide,
3/4"
high and
18cc
change in the amount of water. DO NOT turn the screw more than one full turn at a
2-1/2"
long.
"+"
or
"-"
WATER FILL ADJUSTING SCREW
1 FULL TURN
=
18 cc’s CHANGE
side. One full turn of the screw
35
WIRING
Refer to the wiring diagram supplied with the unit you are working on, and make sure all wiring connections are correct and tight.
THIS IS AN ENERGIZED CIRCUIT. ELECTRICAL SHOCK CAN OCCUR.
BEFORE CHECKING THESE COMPONENTS BE SURE THERE IS NO POWER TO THE APPLIANCE.
AMES & AES
ICE MAKER TYPICAL WIRING DIAGRAM
MOUNTING PLATE
\
muc
ROYALE/ELITE
.__-_bUk4~~NG~E-___
MOLD SUPPORT
II”‘“”
d::,I
LGAEENfYEUM
BLUE
ICE MAKER TYPICAL WIRING DIAGRAM
WIRING DIAGRAM
,__.___YcwNG___._.
I
36
WATER SUPPLY
The water pressure in the water supply line must be between 15 Ibs. PSI and 125 Ibs. PSI.
Lower water pressure, water turned off, or obstructions or air in the water line can cause low or no ice
production.
Loading...