Alarms - AIRSYS 3R1C1 Installation And Operation Manual

Alarms

When a problem occurs during operation of the unit, the controller records the related information and the Sel button
will be lit. Depending on the severity of the alarm, various components are automatically shut down. The system
will restart most of these devices without human intervention after a defined delay period. However, manual reset is
required when high or low pressure alarms occur three times within an hour.
If the Sel button is illuminated, press the Sel button when the screen displays indoor temperature. The code
identifying the malfunction displays on the screen of the user terminal. Press Up to scroll through any other active
alarms. You can review alarm history through a separate menu and this will be covered in the following section.
Table 20 lists the alarm codes that may display with a brief description. Table 22 on page 52 provides more detail on
troubleshooting alarms should they occur during operation of the system.
1
Code Description
5 5
A02 Low pressure 1
5 5
A03 High pressure 1
5 5
A04 Low pressure 2
A05 Smoke/Fire
5 5
A06 High pressure 2
A07 High temperature
A08 Low temperature
2
A09 Prime power outage (Only if DC Failover is used)
2
A10 Supply fan overload 1
2
A11 Supply fan overload 2
A15 Dirty air filter1
A16 Dirty air filter2
A17 pLAN alarm
A18 Clock card alarm
A19 Humidity alarm
A20 Indoor temperature sensor defective
A21 Backup indoor temp. sensor defective
A20&A21 Indoor & backup indoor temp. sensors defective
A22 Outdoor temp. sensor defective
A23 2nd compressor run
A24 Damper Failure 1
A25 Damper Failure 2
A26
HVAC 1 supply air temp. sensor defective
A27
HVAC 2 supply air temp. sensor defective
A28
Generator run
3
A29
HVAC1 air flow defective or DC part powered off
3
A30
HVAC2 air flow defective or DC part powered off
3
A31
HVAC1 AC part powered off alarm
3
A32
HVAC2 AC part powered off alarm
1. Alarm codes listed in the table above will result in an audible tone and a red alarm light presented on the PLD.
2. A09, A10&A11 will not display if the HVAC is equipped with DC EC supply fan and ASLLC.2.48 is chosen.
3. A29, A30, A31& A32 will not display if the HVAC is equipped with AC EC supply fan and ASLLC.2 is chosen.
4. HVAC major alarm will not be cleared until manually reset or the components can work normally at the next working time.
5. If a Low pressure or High pressure alarm is triggered 3 times in one hour, the corresponding unit will LOCKOUT. This
means only the supply fan will operatate with no compressor function. There are two ways to clear the alarm: a. Power
cycle the controller or b. Access the parameters in the table:
reset if high pressure).
Page 50
Table 20: Summary of System Alarms
Outpu
t
Delay
60/10s
2s
60/10s
None
2s
300s
300s
40s
0s
0s
10s
10s
30s
60s
60s
60s
60s
60s
60s
5s
60m
60m
60s
60s
5s
30s
30s
30s
30s
L04
-
Chapter 3: System Operation
Alarm Contact Reporting
High/low HVAC 1 HVAC 2
temp. Major Major
Alarm Alarm Alarm
X
X
X
X
X
X
X
X
X
U2L
(Manual reset if low pressure) or
Alarms
PLD
nd
2
display
Comp.
Run
X
X
X X
X
X X
X
X
X X
X
X X
X
X
X X
X
X
X
X
X X
X
X X
X
X
X
X
X
X
X X
X
X X
U2E
(Manual