Troubleshooting and Checkout Procedures for CVHE/F/G Units with UCP2 Controls
Contents
General Troubleshooting Index .....................1
UCP2 Control Panel and Module
Description .......................................................4
Unit Control Panel ..................................................4
UCP2 Control Panel
and Module Description................................. 6
Chiller Module........................................................ 6
Circuit Module........................................................ 6
Stepper Module...................................................... 6
Starter Module........................................................ 6
Purge Module......................................................... 7
Local Clear Language Display.............................. 7
Remote Clear Language Display Panel
and Remote Clear Language Display
Interface Module .................................................... 7
Options Module...................................................... 7
Module Setpoints relating to the
options module:..................................................... 7
Tracer Communications Interface........................ 7
Printer Interface Module........................................ 8
Secondary Printer Options............................................ 8
Duplex Control Module (DCM).............................. 8
General Troubleshooting Information ......... 9
Problem 1: AFD (adaptive frequency drive)
diagnostics................................................................... 9
Problem 2: Failure to accelerate or did not
accelerate..................................................................... 9
Problem 3: Approach Temperature
reads -40°F .................................................................. 9
Problem 4: Auto X-former starter: Runs (3) seconds and
trips. Unit will not transition....................................... 9
Problem 5: IGV BPI not found or low ..........................9
Problem 6: Bearing Temperatures
1 and 2 Locations. ..................................................... 10
Problem 7: Capacity Limited by High Current when the
phase current as read from the Compressor report reads
zero amps. Getting this message during the run mode...
10
Problem 8: Current Overload...................................... 10
Problem 9: Chiller Loss of Communication with Circuit
module and IGV overdriving close........................... 10
Problem 10: Check Clock (lFW) Informational
Warning Diagnostics. On a loss of power, the
power loss (greater than 15 seconds).......................10
Problem 11: Chiller Loss of Communication with Starter
and the IGV calibrates. ............................................. 11
Problem 12: Chiller Loss of Communication with Starter
or Circuit Loss of Communication with Chiller Diagnostics
11
Problem 13: Clear Language Display won’t go into
Demo mode............................................................... 11
Problem 14: Communication diagnostic; None or De-
graded Communications. .......................................... 11
Problem 15: Loss of Communication with Starter Diag-
nostics at Startup with no Inlet
Guide Vane action. Mode is “Resetting” and can move
through the menus..................................................... 11
Problem 16: Loss of Communication or Intermittent
Communication between any of the modules. (Chiller,
Starter, Tracer, Circuit, Stepper, Options, Purge, etc.)..
12
Problem 17: No Communication, on a power up, get
message “No Communication, Data Not Valid” and no
action in the IGV....................................................... 13
Problem 18: No Communication, on a power up, get
message “No Communication, Data Not Valid” but the
Inlet Guide Vane calibrates....................................... 13
Problem 19: Starter Loss of Communication with Chill-
er. No other diagnostic.............................................. 13
Problem 20: TCI Loss of Communication with Chiller.
13
Problem 21: High compressor Discharge temperature
The compressor discharge temperature exceeded 200×F.
13
Problem 22: Cond. Pressure 2-10 VDC output will not work.
14
Problem 23: Condenser Pressure Delta-pressure output
does not show up....................................................... 14
Problem 24: Cond. Refrig. Temp. Sensor diagnostic,
when the displayed Cond. Refrig. Temp. is reading fine.
14
Problem 25: Condenser and Evaporator entering and
leaving water temps. changing rapidly and reading in-
correctly, i.e. -25°F to 900×F.................................... 14
Problem 26: Condenser Water Flow lost diagnostic. Unit
will not restart
until manually reset................................................... 14
Problem 27: Capacity limited by
current limit................................................................14
Problem 28: Custom menu - Unwanted items that you
did not install and
you cannot remove.................................................... 14
clock does not keep time if there is an extended
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