ABB ACH550-UH HVAC Installation, Operation & Maintenance Manual page 74

74
Alarm
Code
4016 INP VOLTAGE
LOW
4019 OVERRIDE 1
4020 OVERRIDE 2
4021 Selected by PAR
1621
START ENABLE 1
VIBRATION
SWITCH
FIRESTAT
FREEZESTAT
OVERPRESSURE
VIBRATION TRIP
SMOKE ALARM
SAFETY OPEN
LOW SUCTION
PRES
4022 Selected by PAR
1622
START ENABLE 2
VIBRATION
SWITCH
...
LOW SUCTION
PRES
4023 Selected by PAR
1623
START ENABLE 3
VIBRATION
SWITCH
...
LOW SUCTION
PRES
ACH550 E-Clipse Bypass
Alarm Name In
Panel
3-Phase input voltage
has not reached a
sufficient level to
enable editing of
parameters via the
keypad. This message
is generated within a
few seconds of power
up
Alarm is generated
when Smoke Control is
active
Alarm is generated
when Fireman's
Override is active
Alarm will occur when
start order is given and
the "RUN Enable" is not
present
Alarm will occur when
start order is given and
the "RUN Enable" is not
present
Alarm will occur when
start order is given and
the "RUN Enable" is not
present
ACH550 Installation, Operation and Maintenance Manual
Alarm Possible Cause
NA
NA
NA
Run Enable condition is
not satisfied.
Bad 24v supply
Bad digital input
24 V common is not
tied to Digital input
common on bypass
when using external 24
v supply
Run Enable condition is
not satisfied.
Bad 24v supply
Bad digital input
24 V common is not
tied to Digital input
common on bypass
when using external 24
v supply
Run Enable condition is
not satisfied.
Bad 24v supply
Bad digital input
24 V common is not
tied to Digital input
common on bypass
when using external 24
v supply
Corrective Action
Loose J7 connector
Low input voltage.
Incoming voltage has
not reached at least
155 VAC within a few
seconds of powerup
Check Parameter
0103 and 0104 for
digital input status
Check Parameter
0103 and 0104 for
digital input status
Check 24 Volts on
RBCU unit
Check for 24 volts on
respective DI when
condition is satisfied
Check Parameter 0103
For status of digital
input
Check 24 Volts on
RBCU unit
Check for 24 volts on
respective DI when
condition is satisfied
Check Parameter 0103
For status of digital
input
Check 24 Volts on
RBCU unit
Check for 24 volts on
respective DI when
condition is satisfied
Check Parameter 0103
For status of digital
input