Micro-Air, Inc. Page 18 EasyTouch Operations Manual
Rev 3.0 4/3/17
9.3 FAMU Settings & Recommendations
FAMU operation requires 3 important settings to insure proper operation of the system. Careful
consideration is recommended for each setting as described in detail below.
9.3.1 Exhaust Temperature Set Point (Factory default: 70°F/21°C)
This parameter sets the desired exhaust air temperature set point. The EasyTouch will apply
the necessary cooling and/or heating to attain this exhaust temperature within 2°F/1°C. It is
recommended that this setting be about equal to the lowest cabin control temperature set
point in all the spaces affected by this FAMU exhaust air.
9.3.2 Exhaust Relative Humidity Set Point (Factory default: 50%)
This parameter sets the desired exhaust air relative humidity. The EasyTouch will apply the
necessary cooling and/or heating to achieve a relative humidity that is at or below this setting.
Depending on the intake air temperature and relative humidity, it is recommended that this
setting be about equal to the desired relative humidity for all cabin spaces.
9.3.3 Fan Speed Setting (Factory default: Medium)
This parameter sets the fixed fan speed for all FAMU operation. Fan speeds are therefore
always manual during FAMU operation, and there is no automatic fan speed adjustment. It is
highly recommended that the fan speed be set to achieve the following:
a) High enough to provide the minimum number of air exchanges per hour as specified
for the spaces affected by this FAMU system.
b) Low enough to achieve the Exhaust Temperature and Relative Humidity Set Points.
IMPORTANT:
If the FAMU system is unable to achieve the Exhaust Temperature and Relative
Humidity Set Points, it is recommended that the Fan Speed Setting be reduced.
NOTE:
The selected Fan Speed, low, medium or high, can be more finely adjusted by
using setting the corresponding Fan Speed Programming Parameter. See
section 12.2 for more information on how to more precisely adjust the selected
fan speed.
10. FAULTS
There are a total of six different faults that the EasyTouch can declare. Only one applies during CW
operation and all six apply during DX operation.
When a fault is declared, it is displayed in the Status Area of the Home, Main, FAMU, and System Status
screens. Once the fault has cleared, the system will automatically delay 2 additional minutes (except for the
EasyStart Fault) and display “FLT DLY”, “FAULT DLY” or “FAULT DELAY”, before restarting a cooling or
heating cycle. At anytime during the fault condition or fault recovery delay, pressing and releasing over the
top of the fault status on the Main screen will display help information for the particular fault. See section
16.2 for more information on Fault Help.
Certain faults indicate a serious problem for the air conditioner. Any four faults of these types during a
single cooling or heating cycle will result in a LOCKOUT condition. Once a lockout occurs, the system will
not restart automatically. Operator intervention is required. To clear a lockout condition, power must be
cycled (turned off and back on again) via the Power button on the Home, Main, or FAMU display screens.
The fault count being monitored for lockout will be reset to zero upon the termination of the cooling or
heating cycle, or if power is cycled.
NOTE: The Air & FAMU Sensor Faults results in an immediate lockout condition. All other faults affect
lockout as described below.
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