Aqua-Air Tempwise 2001 User manual

Aqua-Air Tempwise 2001
Direct Expansion Digital Thermostat
Operating Manual
Aqua-Air Manufacturing
division of the James D. Nall Co., Inc.
1050 East 9th Street
Hialeah, FL 33010 U.S.A.
Phone [phone] Fax [phone]
Email: [email protected]

Tempwise 2001 Direct Expansion Digital Thermostat Manual
Tempwise 2001 Direct Expansion Digital Thermostat
Aqua-Air Manufacturing
1050 East 9th Street
Hialeah, Florida 33010 U.S.A.
Contents
Introduction ......................................................... 1
BasicOperation ..................................................... 2
OperatorControlsandDisplayPanel .................................... 4
Dual Button Functions ................................................ 7
Special Button Functions ............................................. 7
ModesofOperation .................................................. 8
FanModes......................................................... 10
ProgramMode...................................................... 10
Programming ...................................................... 13
DefaultSettingsTable ............................................... 13
FailSafeandFaultHandlingCodes .................................... 18
FactorySelfTests................................................... 20
Service Tools ...................................................... 20
SpecialHardwareInstructions ........................................ 22
Specifications ...................................................... 24
Trouble Shooting Guide .............................................. 26
Copyright © 1997 Micro Air Corporation, All Rights Reserved
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted on any form or
by means electronic, mechanical, photocopying, recording or otherwise without prior written consent by Micro Air
Corporation.
Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Micro Air
Corporation assumes no responsibility for errors and omissions. Neither is any liability assumed for damages
resulting from the use of this product and information contained herein.

Tempwise 2001 Direct Expansion Digital Thermostat Manual
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INTRODUCTION
The Tempwise 2001 Control is designed for use with Aqua-Air Direct Expansion,
reverse cycle Air Conditioning Systems. The Tempwise 2001 has a universal power
supply that operates on 115V or 230V, 50 or 60 Hz AC power. The Tempwise 2001
includes the following standard and optional features:
Standard Features
User friendly 6 button display panel
Five volt logic and micro controller located in the display
3-digit 7-segment display indicates /F or /C
Paintable Face Plate Cover with recess for matching wall covering insert
Automatic fan speed reduction as set point is approached
Six (6) programmable manual fan speeds
16 programmable parameters for custom installations
AC voltmeter to protect valuable electrical components
High and Low Refrigerant pressure sensor inputs
Moisture Mode for controlling relative humidity
De-Icing cycle to prevent evaporator coil icing
Programmable multiple compressor staging delays
Universal AC power supply
Nonvolatile memory retains settings without batteries
Programmable display brightness control for night use
Optional Features
The following optional items can be added by plugging the device into the appropriate
jack and making the necessary programming changes:

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Outside Air Temperature Sensor - No programming necessary
Alternate Air Temperature Sensor - No programming necessary
Custom painted display panels
Pump Guard water sensor
This manual is intended to provide information necessary to insure proper installation
and operation of the Tempwise 2001. Poor installation and/or MISUNDERSTOOD
operating parameters will result in unsatisfactory performance and premature failure of
the Tempwise 2001.
Read This Manual Completely Before Proceeding!
If you require assistance prior to or during the installation of the Tempwise 2001 call
Aqua-Air at [phone] or Fax your questions to Aqua-Air at [phone]. The
Tempwise 2001 is covered under existing Aqua-Air Manufacturing Warranty Policy.
Incorrect installation, neglect and system abuse are not covered under Aqua-Air's
warranty policy.
NOTE: In order to continually improve the Tempwise 2001 Control, Aqua-Air
reserves the right to change this product’s basic operation, specifications and
design criteria without prior notice.
BASIC OPERATION
The Tempwise 2001 is a user friendly, easy to operate, programmable temperature
control.
• Press the Power button once to engage the system. The display indicates room
temperature when the system is on and the display is blank when the system is off.
• Press and release the Mode Button until the desired Mode LED is illuminated.
• Set the room temperature by pressing the up or down button. The set point can be
viewed by momentarily pressing and releasing the up or down button.
Fan speed operation is automatic. The fan speed decreases as set point temperature
is approached. The fan will operate at low speed when set point is satisfied. Manual
fan speeds can be selected by pressing the Fan Speed Button and selecting the desired

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fan speed. The fan will operate at the speed selected and will not change speeds with
room temperature.
The fan can be programmed to cycle on and off with the Heating and Cooling demand.
Normally the automatic fan speed operation is reversed in the heating mode, however,
the fan speeds can be programmed to operate the same as in the cooling mode.
NORMAL HEATING OR COOLING CYCLE
Select Cool only and cooling only will be supplied. The cabin temperature will be
maintained within 2/F of the set point. Select Heat only and only heating will be
supplied. The cabin temperature will be maintained within 2/F of the set point.
Select Automatic and both heating and cooling will be supplied as required. While in the
automatic Mode Tempwise 2001 will maintain a two degrees Fahrenheit (2 /F)
temperature variation. A four degree swing is required to cause the unit to shift to the
opposite mode. Once in a given mode, heating or cooling, Tempwise 2001 will maintain
a two degree differential.
When the Heating or Cooling demand is satisfied, the compressor cycles off and the
Automatic Fan returns to low speed. The fan speed will remain constant if Manual Fan
Speed has been programmed.
REVERSING VALVE OPERATION
The reversing valve is toggled to the opposite mode when heating or cooling is required
to reduce the compressor starting surge. The valve will only toggle to the opposite
mode when a cooling or heating cycle is called for and if the system has been off for
less than seventy-five (75) seconds. The valve will also toggle if a cycle is interrupted
from the display panel by pressing the power button ON/OFF, or changing the set point.
Unnecessary valve toggling has been limited to reduce reversing valve noise. Valve
toggling can be totally eliminated by programming the minimum compressor staging
delay at seventy-five seconds (75) or greater.
Power on reset, which occurs when the system is powered up, will always initiate a
valve toggle.

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MOISTURE MODE
While in the On mode, press the Mode Button until the Moisture Control LED is lit.
Every four (4) hours, the fan is started and air circulated for thirty (30) minutes. During
this time the air temperature is sampled and entered into memory. The cooling cycle is
started and continues until the temperature is lowered 2/F. The system is allowed a
maximum of one hour running time to reach the desired temperature. Four (4) hours
after the temperature is satisfied or the Cooling Mode times out, the cycle is repeated.
During the humidity cycle the water valve LED is lit while the system is cooling.
MEMORY
The Tempwise 2001 has nonvolatile memory which requires no batteries or any form of
backup power. When power is lost the operating parameters are retained indefinitely.
When power is restored, the control resumes operating as last programmed. All
operating and programming parameters are entered into nonvolatile memory instantly
and are retained indefinitely.
OPERATOR CONTROLS AND DISPLAY PANEL
Refer to Figure 1 for the buttons locations and display functions listed on the following
pages.
1. POWER BUTTON - The power button is used to toggle between the On and Off
modes. Press the power button once to toggle the unit to the On mode. Press the
power button again to toggle to the Off mode.
2. FAN SPEED BUTTON - Press and release the Fan Button to advance from auto
fan to manual fan. Press and release the fan speed button to advance the manual
fan speeds, 1 through 6. Press and release again to return to the automatic fan
mode. The selected fan mode is indicated by the auto and manual fan LED’s.
3. UP BUTTON - Momentarily press the up button and the set point will appear in the
temperature display. Press and release the up button to increase the set point one
degree. The set point Is increased by one degree each time the up button is
pressed and released. The highest set point allowed is 85/F. The up button is used
with the down button to display the Water In temperature when the control is on.
The up button is also used to increase program values in the program mode.

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4. DOWN BUTTON - Momentarily press and release the down button to display the
set point. Press and release the down button to decrease the set point. The set
point is decreased one degree each time the down button is pressed and released.
The lowest set point allowed is 55/F. The down button is used in conjunction with
the up button to display Water In temperature when the control is on. The down
button is also used to reduce program values in the program mode.
Tempwise 2001 Display Panel
Figure 1: Tempwise 2001 Control Buttons and Indicator Displays
5. MODE BUTTON - The mode button is used to select one of the four operating
modes. Press and release the mode button and the Tempwise 2001 will advance
to the next mode. Continue to press and release the Mode button until the
desired operating mode is reached. The mode selected is indicated by the Mode
LED, i.e., Cool, Heat, Automatic or Moisture Mode.

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6. TEMP SELECT BUTTON - Press and release the Temp Mode Button to view
inside air temperature, outside air temperature (optional) or the set point. The
appropriate LED, Inside, Outside or Set Point will be lit indicating which
temperature is being displayed. If no outside air sensor is installed three (3)
dashes will appear in the Three Digit Display.
7. THREE DIGIT SEVEN SEGMENT DISPLAY - The inside air temperature is
displayed in the window whenever the control is turned on. The three digit 7
segment display provides a readout of the return air temperature. The display
also indicates program information, fault codes and outside air temperature when
the optional outside air sensor is installed. The display momentarily indicates the
set point when the up or down button is pressed. When the control resumes
operation after a power interruption all the display LEDs will turn on for one
second. This is a normal operating condition and is referred to as "Power On
Reset".
8. HEAT MODE LED - The heat mode LED will be lit when the Heat Mode has been
selected. The heat mode LED is also lit when the optional electric heat is installed
and the beat mode is selected. Electric heater status, on or off, is indicated by the
right side decimal point (18).
9. COOL MODE LED - The cool mode LED will be lit when the Cooling Mode has
been selected.
10. AUTO LED - The auto LED is lit when the automatic heating or cooling mode has
been selected. The control will automatically switch to heating or cooling when
this mode is selected.
11. MOISTURE CONTROL LED - The moisture mode LED is lit when the Moisture
Control has been selected. This mode is used to control humidity during periods
when the vessel is unoccupied.
12. MANUAL FAN LED - The manual fan LED will be lit when one of six manual fan
speeds has been selected.
13. AUTO FAN LED - The auto fan LED is illuminated when automatic fan speed
operation has been selected.

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14. FAN SPEED BAR GRAPH - There are six (6) individual fan speed LED's in the
Fan Speed Bar Graph. Each LED represents one (1) fan speed. Low fan speed
(1) is indicated by illuminating the first LED. High fan speed is indicated by
illuminating all six (6) LED's. Any of the six (6) fan speeds available are displayed
by illuminating the appropriate LED's.
15. INSIDE LED - The inside LED is lit when the inside air temperature is being
displayed.
16. OUTSIDE LED - The outside LED is turned on when the outside temperature is
displayed (optional).
17. SET POINT LED - The set point LED is turned on when the set point is displayed.
18. VALVE LED - The water valve operating status (Open or Closed) is indicated by
turning on the right most decimal point in the 3 Digit Display.
DUAL BUTTON FUNCTIONS
Up & Down Buttons....Press the Up and Down buttons together and the outside air
temperature will be displayed, provided the OPTIONAL OUTSIDE AIR TEMPERATURE
SENSOR has been installed. No programming is required.
Press the UP & Down Buttons simultaneously, while in the program mode, to set new
custom programming defaults.
Power and Down buttons.... Simultaneously press the power and down buttons while
viewing the Service Fault History Log clears the Fault History Log.
SPECIAL BUTTON FUNCTIONS
Special button functions are implemented by pressing and holding a particular button
while the controls’ AC power is turned on.
1. Service History Log... View the service history log by pressing and holding the
Mode Button while turning on the AC power. Exit the service history log by pressing the
power button once. Clear the service history log by simultaneously pressing the power

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and down buttons.
2. Self Test Mode... Press and hold the power button while AC power is applied to
enter the self test mode, The self test is used to diagnose problems and test the air
conditioning system. For complete details see page 14 of this manual.
3. View Hour Meter... To view the compressor hour meter, press and hold the down
button while applying AC power. Maximum recorded time is 10,000 hours. The hour
meter stops at maximum (10,000 hrs) and can only be reset by Aqua-Air Manufacturing.
The hour meter functions are described fully on page 16 of this manual.
MODES OF OPERATION
Off Mode
When the Tempwise 2001 is in the Off mode, all control outputs are turned off.
Program parameters and user settings are saved in nonvolatile memory. The program
mode can only be accessed from the Off mode.
On Mode
When the control is in the On mode, power will be supplied to the appropriate control
outputs and the display will indicate the current state of operation. The operating and
program parameters resume based on those stored the last time the unit was operating.
Cool Only Mode
When “Cool” LED is on, only the cooling systems are selected and operated as
required. When the temperature drops below the set point, the system will not
automatically switch to the heating mode. Cooling only is available for customers that
do not want automatic cooling and heating operation. Systems without reverse cycle
heating can have an optional electric heater installed should heating be required.

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Heating Only Mode
When the “Heat” LED is on, only the heating systems are selected and operated as
required. Should the temperature rise above the set point, the system will not
automatically switch to the cooling mode. Heating only is supplied for customers that
require the system to not automatically switch from the heating to the cooling mode.
Automatic Mode
When the “Automatic” LED is on, both heating and cooling are supplied as required.
The heat and cool LED’s will be lit according to the mode required. When the system
requires compressor operation for heating or cooling, theright most decimal point (18)
will turn on when the compressor is On.
Temperature in a given mode will be maintained within two degrees Fahrenheit (2/F) of
the set point temperature, however, a four degree difference is required to allow the
control to change modes. Once in a new mode, the temperature will remain within two
degrees Fahrenheit (2/F) of the set point.
Moisture Mode
While in the “On” mode, press the Mode Button until the Moisture Mode LED is
illuminated. Every four (4) hours, the fan is started and air circulated for thirty (30)
minutes. During this time the air temperature is sampled and entered into memory.
The cooling cycle is started and continues until the temperature is lowered 2/F. The
system is allowed maximum of one hour running time to reach the desired temperature.
Four (4) hours after the temperature is satisfied or the one hour timer runs out the cycle
is repeated. During the humidity cycle the water valve LED is lit while the water valve is
turned on and the system is cooling.

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FAN MODES
Automatic Fan Speeds
Tempwise 2001 has six automatic fan speeds available. Speed
six is high, three is medium and one is low or the slowest speed.
Automatic fan mode allows the Tempwise 2001 to determine
the required fan speed based on room temperature. The closer
the room temperature is to the set point, the slower the fan will
run. This permits a balance between the most efficient
temperature control and slower, quieter fan speeds. Automatic
fan operation is the factory default, however, manual fan
speed control is available.
Manual Fan Speeds
Six (6) is the fastest and one (1) represents the slowest fan
speed. Manual fan mode allows the user to select and maintain
the desired fan speed manually. When a manual fan speed has
been selected, the fan speed bar graph will indicate the speed
selected by the number of LED's lit. Select speed 3, for Fan
Speeds example, and the first 3 LEDs in the fan bar graph will turn on. Manual Fan
Mode is sometimes preferred when room temperature is constantly changing due to
varying heat loads.
PROGRAM MODE
Program Mode Overview
The program mode is used to adjust the systems operating parameters to suit the
particular needs of individual users. The program mode is also used to tailor the air-
conditioning system for the most efficient operation within an installation. Installation
variables such as, ducting, sensor location and system layout affect the perceived
operation of the overall system. The program mode allows the system to operate as
efficiently as possible under all conditions. The Tempwise 2001 is shipped with factory
programmable default settings which are stored in permanent memory and can be
recalled at any time.

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Warning
Severe electrical disturbances can sometimes upset the
Tempwise 2001 operating sequences. Operator confusion
related to program parameters can also cause what may seem to
be operational problems. Whenever there is any doubt as to the
proper operation of the controller, Factory Default Parameters
should be re-initialized.
Entering Program Mode
The program mode can only be entered from the
off mode. From the off mode and in the following
order, press the Select, Up, Down and the
Select buttons. These buttons have to be
pressed and released in the order given. The
letter "P" appears in the display. The buttons
have to be pressed in the sequence described.
Remember "SUDS"... It's the key to enter and
unlock the program mode. The characters "P"
then "P1" followed by the parameter setting,
appear in the display. The Tempwise 2001 control is now in the program mode. Exit
the program mode, to the off mode, by pressing and releasing the power button.
NOTE: The control will exit the program mode and return to the “off” mode if no
programming is attempted for one (1) minute.
Restore Memorized Default Settings
IMPORTANT! The memorized default settings can be restored by entering the software
ID program mode and setting P-16 to rSt. Exit the program mode and the software
version number appears in the display. The memorized default settings are restored
and the Tempwise 2001 control returns to the off mode. The software version number
is always displayed when you exit the program mode.

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USING THE PROGRAM MODE
Increment from one program parameter to the next by pressing the Mode Button while in
the program mode. Press and release the Mode Button to advance to the desired
parameter. Use the up and down buttons to change the program parameter values. The
programmable parameters range from P-1 through P-16.
Up and Down Buttons
The up and down buttons are used to select the data or set the desired limits for the
parameter being programmed. This method is followed throughout the program mode,
however, special instructions are included for individual functions as required.
Exiting the Program Mode
There are two methods to exit the Program mode. Press the power button and the
Tempwise 2001 control will return to the Off mode. Not pressing any buttons or attempting
any program changes for sixty (60) seconds will allow the control to exit the Program mode
to the Off mode. Any programming changes that were made while in the Program mode
will be memorized and put into operation when the Program mode is exited and the control
is returned to the On mode.
Software Identification
The software version of the control is identified for one (1) second prior to the exit from the
program mode. The software identification number, i.e. "A10" will appear in the display for
one second, then the control will return to the off mode.
Should there be any reason to contact Aqua-Air Manufacturing about the system or
programming the Tempwise 2001 be sure to have the software identification number
available.

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PROGRAMMING
Programmable Parameters
There are eighteen (18) programmable parameter locations with their Factory Default
Settings listed in this section. The table below indicates what these parameters are, along
with the permitted values and the original Factory Default Settings.
Program
Number Description Default Range
P-1 High Fan Speed Limit (arbitrary units) 85 56 - 85
P-2 Low Fan Speed Limit (arbitrary units) 50 30 - 55
P-3 Compressor Staging Time Delay 15 5-135 seconds
P-4 Temperature Sensor Calibration 0 Ambient ± 10/F
P-5 Failsafe Modes and Mnemonic
High Freon Pressure - - - HPF
Low Freon Pressure - - - LPF
Low AC line voltage - - - LAC
4 = 4 failures With 90
Second Re-start Delay
Manual reset is required
Off
1= Continuous No Display
2= Continuous W/ Display
3 = 4 Failure Reset
Required
P-6 Low AC Voltage Cut-Off 85 VAC (115V)
185 VAC (230V)
Off - 75 to 100 (115V Unit)
Off - 175 to 200 (230V Unit)
P-7 De-Icing Cycle 0 0 = Off
1 - 3 Minutes
P-8 Pump Sentry ... Protects Pump and
Compressor From Loss of Seawater
Off Off
On = Select 100/F to 150/F
P-9 Display Brightness Control 13 = Maximum 4 = Low
13 = Maximum
P-10 Display /F or /C/F/F = Fahrenheit Displayed
/C = Celsius Displayed
P-11 Cycle Pump With Compressor or
Continuous Pump Operation
OFF = Cycle with
Compressor
OFF = Cycle with Comp.
On = Continuous Operation
P-12 Reverse Fan Speeds in Heating Mode rEF = Reversed nor = Normal Fan Operation
rEF = Reversed in Heating
P-13 Continuous Fan or Cycle Fan on
Demand
con = Continuous
Fan Operation
CYC = Cycle On Demand
con = Continuous
P-14 Reverse Cycle Heating or Electric Heat
Only Option Installed (cooling only units)
nor = Reverse Cycle
Heat
nor = Reverse Cycle Heat
ELE = Elect. Heat Installed
P-15 Fan Motor Type SP = Shaded Pole SP = Shaded Pole
SC = Split Capacitor
P-16 Reset Memorized Programming Defaults nor = Normal nor = Normal
rest = Reset Defaults
Should any programming problems or confusion occur, reset the memorized default settings by
entering the program mode and setting P-16 to rest.

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P-1: High Fan Limit
The upper fan speed limit can be tailored to suit various motors and operating conditions.
The high fan limit is adjusted with the system installed and operational. The range of
values are 56 through 85 and represent arbitrary units. Setting a higher number, results
in a higher fan speed, setting lower numbers, lowers the high fan speed limit. Use the up
and down buttons to select the desired high fan speed limit. The factory default setting is
eighty-five (85).
P-2: Low Fan Limit
The low fan limit determines the lowest output allowed for the low fan speed. The range
of values for the low fan speeds are 30 through 55, in arbitrary units. Use the up and down
buttons to select the desired low fan speed limit. Setting a higher number, results in a
higher fan speed, setting lower numbers, lowers the low fan speed limit. The factory
default setting is 50.
IMPORTANT! Once the high and low fan speed limits are set, the unit will automatically
readjust the remaining fan speeds to produce six (6) equally spaced in both the automatic
and manual fan speeds modes.
P-3: Compressor Staging Time Delay
The compressor staging delay is provided for installations where more than one system is
being operated from the same power source. Setting the staging delays at different
intervals allows only one compressor to start at a time. The units should be staged at least
five (5) seconds apart. The minimum delay is five (5) seconds and the maximum is one
hundred thirty-five (135) seconds. The factory default setting is 15 seconds.
P-4: Temperature Calibration
Use this feature to calibrate the air sensor within a range of + ten (10) /F. Enter the
program mode and the ambient temperature appears in the display. Use the up and down
keys to select the desired offset. The temperature in the display will increase or decrease
according to the offset programmed. The factory default setting is zero.
P-5: Fail-safe Level
The system can be configured for one of four fail-safe levels. Selecting OFF turns off all

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fail-safe protection and mnemonic display codes. Level one (1) shuts down the system,
allows the system to restart after a 90 second delay and displays no failure code. Level
two (2) shuts down the system allows continual restarts after the 90 second delay and
displays the appropriate mnemonic failure code. Level three (3) operates the same as level
two with the addition of a system shutdown after four (4) consecutive failures... Manual
reset is required to restart the system.
P-6: Low AC Voltage Cut-Off
Tempwise 2001 can be programmed to protect the system against sustained low AC line
voltage conditions. The compressor will be shut down and "LAC" flashed in the display if
the line voltage goes below the programmed value for more than ten (10) minutes.
Programmable values are 75 VAC to 100 VAC for 120 volt units and 175 VAC to 200 VAC
for 220 volt systems. The factory default is 85 VAC for 120 volt units and 185 VAC for 220
volt systems. NOTE: Low Voltage Protection can be turned off by programming Off instead
of selecting a voltage value.
P-7: De-Icing Cycle
The Tempwise 2001 is equipped with a De-Icing Cycle to prevent ice build up on the
evaporator coil during extended periods of cooling operation. Installation variables such
as grille sizes, length of ducting, insulation R factors and ambient temperatures determine
the cooling run time required to achieve set point. Customer usage may substantially
increase run times by operating the system with the hatches and doors open.
Programming unrealistic set point [55' F] and leaving the salon door open will usually cause
the evaporator to ice up on warm muggy days.
De-Icing is accomplished by switching the reversing valve into the Heat Mode while the
system is cooling. The valve will remain energized for the programmed cycle time. The
cycle is programmable from OFF through a period of 3 minutes. The factory default setting
is Off.
P-8: Optional Pump Sentry
The Tempwise 2001 can be equipped with an optional temperature sensor that is used to
monitor the condenser coil temperature. The sensor is plugged into the outside air sensor
jack and parameter P-8 programmed for a temperature between 100/and 150/F
depending on sea water temperature and the system type. When the coil temperature
rises above the programmed value the pump and compressor are shut down and “PPP”

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is flashed in the display. The factory default is Off, no pump sentry installed.
P-9: Display Brightness Control
The display brightness can be adjusted to suit ambient cabin lighting conditions. The
allowed settings are four (4) to thirteen (13), with four (4) being the dimmest and thirteen
(13) the brightest. Typically a dark cabin will require a setting of four or five. A very bright
cabin will require a setting of twelve or thirteen. The factory default setting is thirteen (13).
P-10: Fahrenheit or Celsius Selection
The unit can be programmed to display either Fahrenheit or Celsius. Programming /F
selects degrees Fahrenheit and programming /C displays degrees Celsius. The factory
default setting is /F, Fahrenheit. When degrees Celsius (/C) is selected the readings are
displayed in tenths, i.e. 22.2/.
P-11: Cycle Pump With Compressor
To increase pump life and conserve electricity the pump can be programmed to cycle on
and off with the compressor. The pump can also be programmed to operate continuously
whenever the system is on. To program the pump for continuous operation turn P-11 On.
The factory default is Off, which cycles the pump with the compressor.
P-12: Reverse Automatic Fan Speeds During Heating
The automatic fan speeds can be reversed during the heating mode to improve personal
comfort in cooler climates. The fan speed is decreased as the temperature spread
increases. The fan will speed up as the set point is approached. Lowering the fan speed
when the cabin is cold raises the supply air temperature. The fan switches to low speed
when the set point is satisfied and the water valve cycles off. The fan can be programmed
to operate the same as in cooling by programming P12 nor which represents normal fan
operation during the heating cycle. The factory default is rEF, which reverses the
automatic fan speeds during heating.
P-13: Cycle Fan with Compressor
The fan can be programmed to run continuously when the system is on or can be allowed
to cycle with the compressor. When cycled with the compressor, the fan will operate only
when heating or cooling is called for. To cycle the fan with the compressor select CYC

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Page 17
which stands for cycle the fan with the compressor. To operate the fan continuously select
con which represents continuous fan operation. The factory default is [con] continuous fan
operation when the system is on.
P-14: Reverse Cycle or Electric Heat
Units not equipped with reverse cycle heat may have an electric heater added. Electric
heat requires the compressor be turned off when heating is called for. The reversing valve
output is used to control the optional electric heating element contactor. The valve output
relay can only carry 6 amps, therefore, a heavy duty contactor must be installed to carry
the heater current. Program parameter ELE for the electric heat option. The factory
default is nor which is normal reverse cycle heating.
P-15: Fan Motor Selection
There are two basic fan motor types, shaded pole (SP) and split capacitor (SC). Each
motor reacts differently to speed control and each motor requires different timing for
optimum fan speed variation. The default setting is "SP" which selects the shaded pole
motor type, however, "SC" should be selected if a split capacitor type of fan motor is used.
Aqua-Air Manufacturing supplies shaded pole type fan motors, therefore, the factory
default selection is "SP".
P-16: Reset Memorized Defaults
The default programming parameters can be reset by entering the program mode and
selecting “rest”. This will restore the programmable parameters to the values selected
when the system was shipped. The program parameters listed on page nine may be
altered by Aqua-Air Manufacturing, the installing dealer or the end user. Once new
defaults are entered (see page 7, dual button functions) and memorized the new defaults
will be reset. The original factory programmable parameters as listed on page nine (9) will
have to be restored manually.
Why Memorize New Defaults?
Once the desired programming changes have been made and the system tests
satisfactorily, your work can be saved as the new factory defaults. Your new defaults are
initiated by simultaneously pressing and releasing the up and down buttons prior to exiting
the program mode. New defaults can be initialized at any time by entering the program

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Page 18
mode and following the above instructions. Once new defaults have been initialized the
control will revert back to the new defaults whenever factory defaults are restored as
described on page 10 of this manual.
FAIL-SAFE AND FAULT HANDLING CODES
When a fault is detected Tempwise 2001 will display one of the following Mnemonic fault
codes:
HPF...Indicates high Freon pressure. Fifteen (15) second Delay... Ignored in Heat Mode.
LPF...Indicates low Freon pressure. Ten (10) minute charge time delay.
LAC...Indicates low AC line power
AAA...Indicates failed air sensor. Unit will not run until repaired.
PPP...Indicates the sea water pump has failed.
Fail-Safe
There are four levels of fail-safe protection including the fail-safe off mode. Level one
monitors the sensors, takes appropriate action and allows continuous restarts after a 90
second delay... Does not display the fault code. Level two works the same as level one,
however, the appropriate fault code mnemonic is displayed during the time-out between
restarts. Level three is identical to level two with the inclusion of a three successive failures
lockout routine. After four (4) consecutive failures the system is shut down and a manual
reset is required.
Lockout
Lockout occurs if P-5 is programmed for level 3 and four consecutive faults are detected
within a heating or cooling cycle. Lockout causes the system to shut down and flash the
mnemonic fault code. Lockout can only be cleared by turning the unit off, then on using
the Power button.
Fault Display
When a fault occurs the appropriate mnemonic code is flashed in the display. The flashing
mnemonic can be removed from the display by pressing and releasing the power button
to reset the control. Resetting the control does not solve the problem that caused the fault!