39
Table 17 — PIC 5 Alarm Codes (cont)
NOTE: Some alarm codes (identified in the Reset Type column) are
eligible for Swift Restart when the Auto Restart option is enabled.
The Swift Restart algorithm allows for quicker restart and decreases
the normal start-up delays and verification times.
ALARM
CODE
(ALARMRST)
ALARM TEXT
DESCRIPTION
RESET TYPE
ACTION TAKEN
BY CONTROL
POSSIBLE CAUSE
PROTECTIVE LIMITS (CONT)
Alm-264
ALM-264 Protective Limit
— Diffuser Position Fault
Manual Unit shuts down.
Confirm that Diffuser Option in SRD
Configuration screen has not been
Enabled if compressor does not have a
split ring diffuser. May indicate rotating
stall condition.
Check rotating stall transducer wiring
accuracy and sealing.
Check diffuser schedule and guide vane
schedule in SRD Configuration screen.
Check for proper operation of diffuser
and inlet guide vane actuators including
inlet guide vane calibration.
Check diffuser actuator coupling for
rotational slip.
Check for electrical noise in IOB Diffuser
Pressure wiring. Do not continue to
operate compressor except for diagnos-
tic purposes..
Alm-265
ALM-265 Protective Limit
— Refrigerant Leak
Manual Unit shuts down.
REFRIGERANT LEAK OPTION is
Enabled and the REFRIGERANT LEAK
SENSOR output exceeded REFRIGER-
ANT LEAK ALARM mA.
Check for refrigerant leaks.
Check leak detector for proper operation.
Check REFRIGERANT LEAK ALARM
mA setting in the OPTIONS screen.
Check 4 to 20 mA or 1 to 5 v output from
refrigerant leak sensor to IOB.
Confirm that IOB SW2 dip switch 1 is in
the correct position.
Alm-266
ALM-266 Protective Limit
— IOB Low Voltage
Automatic Unit shuts down.
Check IOB 24 VAC power supply and
the transformer output voltage.
Alm-267
ALM-267 Protective Limit
— Guide Vane Fault
Manual Unit shuts down.
Alarm before start indicates guide vane
opening has not closed to less than 4%.
Alarm while running indicates guide
vane position is < –1% or > 103%.
Enter Quick Test and conduct Guide
Vane Calibration.
Check wiring between the guide vane
feedback potentiometer and IOB
terminals.
Check the 10,000 ohm guide vane posi-
tion feedback potentiometer or 4 to
20mA current.
Alm-268
ALM-268 Protective Limit
— Damper Valve Fault
Manual Unit shuts down.
Check damper valve wirings.
Do a control test on the damper valve to
check the feedback signals.
Alm-269
ALM-268 Protective Limit
— EC Valve Fault
Manual Unit shuts down.
Check EC valve wirings.
Do a control test on the EC/HGBP valve
to check the feedback signals.
Alm-270
ALM-270 Protective Limit
— High Cond Water Flow
Manual Unit shuts down.
Check condenser water pressure sen-
sor and wirings.
Alm-271
ALM-271 Protective
Limit — Emergency Stop
Automatic Unit shuts down.
Check EMSTOP command from net-
work and the remote stop dry contact
from IOB.
Alm-272
ALM-272 Protective Limit
— ISM Config Conflict
Automatic Unit shuts down.
Configuration data in controller and ISM
are mismatched.
In Maintenance menu, choose Main-
tains ISM configDelete ISM config:
NO - Upload ISM configuration data to HMI
YES- Download ISM configuration to ISM
Alm-273
ALM-273 Protective Limit
— Swift Restart Limit
Exceeded
Manual Unit shuts down.
Understand the reason and correct why
Swift Restart happens frequently.
Alm-274
ALM-274 Protective Limit
— Chiller Lockout
Automatic Unit shuts down. Check chiller lockout input in IOB
Alm-275
ALM-275 Protective Limit
— Fire Alarm
Automatic Unit shuts down. Check fire alarm input in IOB
Alm-276
ALM-276 Protective Limit
— Stop Override
Manual Unit shuts down.
Check stop override point status in
GENUNIT table
Alm-280
ALM-280 Protective Limit
— High VFD speed
Manual Unit shuts down.
Check VFD actual speed
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