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Original instructions
Installation manual
17
We reserve the right to make changes without any prior notice.
UATYQ*Y1
Packaged Rooftop
4P522681-1B
CODE DESCRIPTION MAIN CAUSES CHECKS AND TROUBLESHOOTING RESET
UNIT
OFF
ITEMS OFF
AL14 Unit Maintenance
It has been exceeded unit
operating hours threshold.
Unit check up. Perform the ordinary
maintenance operations.
M (1) No None
AL15
Main fan overload/
interblock
Thermal protection ventilation
fan
Check working conditions.
M Yes All
Check fans motor cabling, terminals and
adsorbed current.
Check thermal overload switch.
AL16 Filter dirty
The pressure drop across
theltermeasuredbythe
dierentialpressureswitchis
higher than the set value
Cleanorreplacetheairlters. M
No None
Calibrationofthedierentialpressure
switchforcloggedlters.
M
AL17 Not used - - - - -
AL18 Flow-switch alarm
Thedierentialairpressure
switch detects a pressure
(airow)lowerthantheset
point
Checkworkingconditions(airowand
pressure).
M Yes All
Check working operation of the
ventilation fans.
Check air distribution system.
Check the correct intervention of the
airowswitch.
AL19
Clock broken or not
present
The clock board is defective
Reboot the controller; if alarm persists,
replace the main board.
M No
None, hourly
programming not
operating
AL20
Summer setpoint
< winter setpoint
Summer set point is lower
than winter set point or
winter set point is higher
than summer set point and
automatic changeover is
enabled
Check for the correct temperature set
point (cooling and heating modes).
A Yes All
AL21
B1 probe broken or
disconnected
The reading of the probe B1
(supplyairowdierential
pressure probe) exceeds the
operative range
Check working conditions.
M No
All components and
fuctions directly
related to the probe
Check in the controller for the correct
probe reading range .
Check the correct reading of the probe
and eventually replace it.
Check probe wiring and terminals.
Check correct functioning of the analogic
input of the main board.
AL22
B2 probe broken or
disconnected
The reading of the probe B2
(returnairowdierential
pressure probe) exceeds the
operative range
Check working conditions.
M No
All components and
fuctions directly
related to the probe
Check in the controller for the correct
probe reading range .
Check the correct reading of the probe
and eventually replace it.
Check probe wiring and terminals.
Check correct functioning of the analogic
input of the main board.
AL23
B6 probe broken or
disconnected
The reading of the probe B6
(condensing pressure circuit
2) exceeds the range
Check working conditions.
M No
All components and
fuctions directly
related to the probe
Check in the controller for the correct
probe reading range .
Check the correct reading of the probe
and eventually replace it.
Check probe wiring and terminals.
Check correct functioning of the analogic
input of the main board.
Содержание
- Models 1
- Operation manual 1
- Rooftop packaged unit 1
- Rooftop packaged unit english 1
- Contents 3
- Operating guide 5 3
- User interface 4 3
- User interface 4
- Operating guide 5
- Software menu 5
- Main mask and menu 6
- Switching on off he unit from keyboard 7
- Temperatureandairflowsetpointadjust 7
- Clock menu and time slots setting 8
- Time slots programming examples 9
- Stopwashingfunction forcedfreecoolingatunitstart up 10
- Summer winter changeover from keyboard 11
- Input output visualization 12
- Change language and unit and software data visualization 14
- A automatic whenthealarmconditiondisappears thealarmisautomaticallyreset ac automaticcontrolled thealarmisautomaticallyresetforalimitednumberofattemptsinacertaintime after 15
- Above or by the supervisor reset variable for each alarm with manual reset the reset day and time are stored on the alarm history 15
- Alarms 15
- Eachalarmisidentifiedbyacode alxx andthealarmcauseisdescribedinthemask toresetanactivealarm press and hold for at least 2 seconds the alarm key if the alarm has been successfully reset the alarm mask disappears and if no other alarms are active the red alarm key is switched off an alarm can be reset only if the condition that has activated the alarm is not present anymore 15
- Inthe offunit column itisreportedifthealarmstopsthewholeunitornot 15
- M manualresetfromdisplayorfromsupervisor thealarmmustbemanuallyresetbydisplayasdescribed 15
- On alarm history menu last 150 alarms are stored when the memory is full and another alarm is activated the oldest alarm is overwritten in the following the full alarm list is reported with the main possible causes some troubleshooting hints the reset mode the action on the unit and on its components thealarmresetmodeisreportedonthe reset column 15
- That the reset becomes manual 15
- The manual reset of an alarm must be done only after checking the alarm cause and solving the problem that has activated the alarm the improper reset of an alarm can cause serious damages to the unit or to its components 15
- The mask displays the working hours of compressors 3 and 4 15
- When an alarm is triggered the red alarm key is on and the alarm digital output is activated by pressing the alarm key the last alarm is displayed the other active alarms can be scrolled with arrow keys thisisanexampleofanalarmmask 15
- Yes thealarmstopstheunit no thealarmdoesnotstoptheunit butonlytheconcerneddevices 15
- 1 maintenance alarms must be reset from masks ac ad ae of the maintenance menu and they cannot be reset by 21
- 2 the alarm is reset automatically but to clear the alarm visualization it is necessary to press and hold the alarm 21
- Key for at least 2 seconds 21
- Pressing the alarm key 21
- Cm_dkn_0001_rooftop_en_06 05 2019_rev02 24
- P522681 1 24
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