STULZ CyberRow DX Series Installation, Operation & Maintenance Manual
4-7
01/01/09 00:00:00
00.0°F
00%rh
Dp 00.0°F
Unit On
Main Screen
3.
If the status message "
OFF-Manual Restart Req
"
appears instead of "
Unit On"
, the Automatic On feature
may not be enabled. In this case turn the air conditioner on
by pressing the
Enter (
) key.
NOTE
You may turn the A/C unit on and off at anytime
by pressing and holding the Enter (
) key for 3
seconds.
Other status messages that may appear at the bottom of
the screen are:
"
OFF by remote shutdown"
-
Indicates the Remote
Start/Stop feature is enabled and requires a remote
start switch to be turned On.
"
OFF by Network"
-
Indicates the unit is part of a
group and is off due to a grouping priority command
such as a compressor alarm or loss of airfl ow
or,
the BMS communication feature is enabled and the unit
received a network signal to pause operation.
"
OFF by Internal Alarm"
-
Unit is off due to a
group alarm condition. (Only active with grouped units.)
"
Unit on CL Lockout"
-
This indicates cooling
has been locked out while there is a demand for
dehumidifi cation because the temperature is below the
minimum temperature allowable for dehumidifi cation
(factory default setting is 4°F below setpoint).
4.
After the initialization period expires, the controller
enables the control output to the fl uid control valve
(CRS-W & CRS-G units) and the fans are allowed to
begin operating.
5.
The STULZ logo in the display is replaced with a
blower
symbol. The fans begin operating in stages
with fi ve second time delays. The middle fan starts fi rst,
then the upper fan, then the lower fan.
6.
Following a 45 second time delay (after the fi rst fan
turns on) the controller polls the air proving switch. If
adequate airfl ow is detected, the controller enables the
compressor to turn on if there is a demand for cooling or
dehumidifi cation as defi ned by the control setpoints.
Initialization
Period
Air Proving
Time Delay
30 sec.
45 sec.
Fans
1
3
2
5s 5s 5s
Compressor
Time Delay
10 sec.
7.
The controller records the date and time power is re-
initialized in the alarm history log.
8.
If the actual room conditions are not within the range
of the programmed setpoints, the system will begin
operating in the mode(s) needed to reach the setpoints
(cooling or dehumidifying). Symbols (shown below)
appear in the display to indicate the active operating
modes.
=
Blower On
=
Call For Cooling
=
Dehumidifying
9.
Temperature and humidity alarms are masked out
for 30 minutes to allow for conditions to stabilize without
triggering nuisance alarms.
10. Operator interface to the menu loops is available
from the Main screen by pressing the Program
(Prg)
key.
The controller starts a timer whenever a key sequence
is initiated. Every time a button is pressed, the timer
is reset. If there is no key activity for 60 seconds, the
controller will return to the Main screen unless the Screen
Lock feature is enabled in the Information menu loop (see
page 4-16).
Summary of Contents for CyberRow DX CRS-042-G
Page 94: ......
