Troubleshooting; Table 15, Motor Will Not Start, No Output To Motor; Table 16, Motor Rotates But Does Not Reach Full Speed; Table 17, Deceleration Profile Not Operating Correctly - McQuay RVSS14 Installation, Operation And Maintenance Manual

Default
The default value for the overload parameter is 10.
Phase Order
Description
The line phasing parameter sets the phase sensitivity of the starter. This can be used to protect
the motor from a possible change in the incoming phase sequence. If the incoming phase
sequence does not match the set phase rotation, the starter will display phs err while stopped
and will fault if a start is attempted.
Values
The line phasing can be set to:
Default
The default value for the phase sensitivity parameter is INS.

Troubleshooting

The following troubleshooting charts can be used to help solve some of the more common
problems that occur.

Table 15, Motor will not start, no output to motor.

Fault Displayed.
Watchdog LED on.
Display is blank.
Stopped
No line

Table 16, Motor rotates but does not reach full speed.

Fault displayed.
Accel or Running

Table 17, Deceleration profile not operating correctly.

Motor stops too quickly.
Time seems correct but motor surges at start of
decel.
Time seems correct but motor stops before cycle
complete.
Time seems correct but water hammer occurs at
end of cycle.

Table 18, Motor stops while running.

Fault displayed.
Display is blank.
Stopped
IOMM Starter
• INS - will run with either phase sequence
• ABC - will only run with ABC phase sequence
• CBA - will only run with CBA phase sequence
Display
Shown on display.
CPU card problem.
Control voltage is absent.
FU1 on power card.
Ribbon Cables.
Control Devices
Display buttons disabled.
Missing at least one phase of main po Check power system.
Display
Shown on display
Mechanical problems.
Abnormally low line voltage.
Display
Display
Shown on display.
Control voltage is absent.
FU1 on power card
Control devices.
Cause
See fault code table.
Consult McQuay Factory Service.
Check for proper control voltage.
Replace FU1.
Check ribbon cables.
Check control devices
Enable display buttons.
Cause
See fault code table.
Check for load binding. Check motor.
Fix line voltage problem
Cause
Time setting. or improper level
setting.
Decel level 1
Decel level 2.
TruTorque DCL End Torque
Decel level 2.
TruTorque DCL End Torque
Cause
See fault code table.
Check control wiring and voltage.
Replace fuse.
Check control system.
Solution
Solution
Solution
Contact McQuay Factory
Service
Contact McQuay Factory
Service
Contact McQuay Factory
Service
Contact McQuay Factory
Service
Solution
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