119
Alarm Screen
Description &
Classification
Possible Causes
Corrective Actions
•
Return duct damaged
•
Sensing Bulb is loose
•
Over charge of
refrigerant
•
Expansion valve
Overfeed
•
Faulty high-pressure
switch. Cut out:
R410A at 575 PSI or
R407 at 450PSI.
•
High indoor temperature, check
blower speed, and check
equipment selection
•
Check return duct for leakage
and check temperature entering
evaporator coil
•
Tighten bulb bracket
•
Check sub-cooling (8-10) and
adjust charge if necessary.
Recover charge, evacuate, then
re-charge system
•
Adjust and check expansion
valve operations
•
Replace high pressure switch
Compressor
Short Cycle
Compressor
has started
more than 10
times in an
hour.
** Urgent
•
Not enough Heat Load
or Oversized System
•
Temperature Dead
Band is set too low
•
Humidity Dead Band
is too low (causing
frequent dehum
cycles).
•
No electric reheat
•
Lack of vapor barrier
•
Unusual high rate of
building heat gain
•
Check for heat load
•
Check and raise Temperature
Dead Band
•
Check and raise Humidity Dead
Band
•
Check reheat elements for
proper operation
•
Seal room with the proper vapor
barrier
•
Check room infiltration
Hi Humidity
The return air
humidity is
higher than the
high humidity
alarm limit.
*Warning
•
Humidity is too High
•
Humidity alarm set
point needs to be
adjusted
•
Check humidity in the room
•
Check High humidity alarm set
point (range 35%-90%)
•
Check water vapor infiltration
Summary of Contents for dap4 touch
Page 1: ...1 dap4 User Manual Data Aire Inc 230 W BlueRidge Avenue Orange CA 92865 www dataaire com...
Page 33: ...32 MENU F INFORMATION differently from what is written in this manual...
Page 69: ...66 MENU K ALARMS LIMITS Service Level continued Control Only...
Page 82: ...78...
Page 133: ...129 Wiring Connections...
