Coastal MK II MK II Thermostat/Thermometer temperature control User Manual

Guardian - Temperature Control
Adjustment and Operation
(1) Operation
The Coastal MK II Thermostat/Thermometer that is incorporated into your Guardian will display box temperature
continuously. When the box warms up to a temperature of two degrees above the set point (default), the thermostat will start the
compressor. This will be signified by the illumination of a yellow snowflake symbol on the display. When the system has lowered the
temperature to the set point, the compressor is stopped and the snowflake symbol extinguished. NOTE: The raindrop and light bulb
buttons are inoperable and have no function on this thermostat.
(2) Turning on and off. Press and hold SET and DOWN buttons for 8 seconds. “OFF” is displayed when turned off.
(3) Adjusting Temperature Set Point
The Coastal MK II is supplied set as a refrigerator thermostat in degrees Fahrenheit, with 40F as the set point. If installed on a
freezer system it is suggested to set the initial set point to 12F (-12C)
To change temperature set-point:
•
Press SET button. "SET" appears in display.
•
Press SET button again. Set point value is displayed and flashes.
•
Press UP or DOWN arrows to the desired set-point. Suggested starting set-points are 40F (4C) for a refrigerator, and
12F (-12C) for a freezer.
•
Press SET button. “SET” is displayed
•
Press SET and DOWN buttons together to quit and return to temperature display, or display will revert automatically in
one minute.
NOTE: Allow sufficient time for the system to settle down between making adjustments. At least one day is recommended.
(4) Fault Code Display
•
•
•
•
“ooo”
“---“
“ALH”
“ALL”
Temperature Sensor Probe or its cable is open circuit or disconnected.
Temperature Sensor Probe or its cable is short circuit.
Buzzer will also sound. High temperature alarm has been activated. See (6)
Buzzer will also sound. Low temperature alarm has been activated. See (6)
(5) Emergency Operation if Temperature Sensor Probe Fails
If the Temperature Sensor Probe becomes either short circuit or open circuit, the Coastal MK II will show an alarm on the
display, see (4). There is also the facility to automatically run the compressor on an emergency on-off routine if a Temperature
Sensor fails, according to time settings entered by the operator. This feature is disabled, but can be activated by entering the
desired “on” and “off” times in c2 and c3 of the Con menu. See (8)
(6) Temperature Alarms
The Coastal MK II is equipped with a buzzer to sound an alarm if the temperature exceeds the set point by the maximum
and minimum values as entered in A1 and A2 in the ALA menu. See(8). These have been pre-set to the maximum permissible
values so that the alarm feature is effectively disarmed. The alarms can be activated by adjusting the values of A1 and/or A2 to the
desired number of degrees above or below the Set Point at which the alarm will operate.
The alarm is set to become operational 3.0 hours after the system is started. This can be adjusted in A6.
The alarm is set to activate 0.5 hours after the threshold set in A1 or A2 is reached. This can be adjusted in A7.
An alarm can be silenced by pressing the Set and DOWN buttons together.
(7) General Reset
A General Reset should only be used as an emergency measure if the programming becomes corrupted. This action will
return all settings to the original factory defaults. It will then be required to reinstall the Coastal values as shown in (8).
1. Press Set for 8 seconds. “0” is shown on display. Press Set again, “CON” is displayed.
2. Press DOWN arrow. Display shows “Ini”. Press Set “Hor” is displayed.. Press UP arrow until “HO” is displayed
3. Press Set; “O” is displayed and flashes. Press Set for 8 seconds and general reset is activated.
(8) Programming
The Coastal MK II is a multi-purpose device with many features that are not appropriate for marine refrigeration use, and
so only the relevant program parameters are shown below. Complete instructions are available on request.
There are five menus. Within each menu there are numerous parameters that can be adjusted. Menu names are as follows, in
sequence:
1.
2.
3.
4.
5.
“CON” (Compressor) – Sets parameters for compressor.
“dEF” (Defrost) – Not used. Deactivated by setting d2 to 0.
“PrO” (Probe) – Sets parameters for temperature probe (sensor).
“ALA” (Alarm) – Provides settings for alarms.
“Ini” (Initialization) – Advanced parameters.
To select menus: Press Set for 8 seconds – “0” flashes. Press and release Set, first menu name (CON) is shown. Press UP or
Down button to scroll through the five menu names. To exit menu list - press Set and Down together or wait one minute.
To select and adjust parameters: When required menu name is shown on display (see above), press Set; first parameter
code will be displayed. Press UP or DOWN buttons until required parameter code is shown then press Set; parameter value is
displayed. Use UP or DOWN buttons to adjust parameter value, then press Set to enter. To exit parameters and return to menu list,
press Set and DOWN together or wait one minute.
MENU
DESCRIPTION
UNITS
RANGE
DEFAULT
COASTAL
CON
Set
r0
c2
c3
Ignore those parameters not shown below
Set point – Desired box or cabinet temperature (See 3)
Differential – Degrees above set point before compressor start.
On-time of emergency cycle when sensor probe is faulty (see 5)
Off-time of emergency cycle when sensor probe is faulty (see 5)
Degrees
Degrees
Minutes
Minutes
r1 to r2
0.1 to 20
0 to 999
0 to 999
3.0
1.0
5
5
40
2.0
0
0
d0
d2
Ignore all dEF parameters except those shown below
Sets thermostat as either a heating or cooling control
Maximum defrost time. Setting this to “0” ensures no defrost.
Minutes
Re/in
0 to 240
Re (cool)
30
Re (cool)
0
PrO
P0
P1
Temperature scale – Celsius or Fahrenheit
Probe (sensor) calibration
Degrees
C or F
-20.0 to 20.0
C
0
F
0
ALA
A1
A2
A6
A7
Ignore those parameters not shown below
Max temp alarm – Degrees above set point (See 6)
Min temp alarm - Degrees below set point (See 6)
Time delay before alarm is active after starting system (See 6)
Time before alarm is activated after max or min temp is reached
Degrees
Degrees
hrs/mins
hrs/mins
0.1 to 99.9
0.1 to 99.9
0.0 to 18
0.0 to 18
8.0
8.0
1.1
1.1
99.9
99.9
3.0
0.5
dEF
Ini
Ignore all Ini parameters except H0 - General Reset. (7)
PO Box 4535 Annapolis MD 21403 USA – www.frigoboat.com – [email protected] – 301-352-5738