Daikin UATYQ-ABAY1, Руководство по эксплуатации

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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
the filter measured by the
differential pressure switch is
higher than the set value
Clean or replace the air filters. M
No None Calibration of the differential pressure
switch for clogged filters.
M
AL17 Not used - - - - -
AL18 Flow-switch alarm
The differential air pressure
switch detects a pressure
(airflow) lower than the set
point
Check working conditions (airflow and
pressure).
M Yes All
Check working operation of the
ventilation fans.
Check air distribution system.
Check the correct intervention of the
airflow switch.
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
(supply airflow differential
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
(return airflow differential
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.