Universal-XR
14/17
UXR01212015_REV1.4mm
Installation and Operating Instructions
21.
TROUBLESHOOTING
Problem
Possible reason
Notes
Display flashing
HA
•
Temperature too high.
•
Check cooling system.
•
Check alarm settings.
Display flashing
LA
•
Temperature too low.
•
Check cooling system.
•
Check alarm settings.
Display flashing
HA2
•
Condenser temperature too high.
•
Check condenser cooling system.
•
Check alarm settings.
Display flashing
LA2
•
Condenser temperature too low.
•
Check condenser cooling system.
•
Check alarm settings.
Display flashing
P1
•
Fault with thermostat probe.
•
Wrong type of probe fitted
(NTC/PTC).
•
Check probe connections and resistance value.
•
Change probe type or alter a parameter
PbC
.
Display flashing
P2
•
Fault with evaporator probe.
•
Wrong type of probe fitted
(NTC/PTC).
•
Parameter
tC
has been set to 4, 5
or 6 without evaporator probe
fitted.
•
Check probe connections and resistance value.
•
Change probe type or alter parameter
PbC
.
•
Fit evaporator probe or alter parameter
tC
.
Display flashing
P3
•
Fault with third probe.
•
Wrong type of probe fitted
(NTC/PTC).
•
Parameter
tC
has been set to 6
without third probe fitted.
•
Check probe connections and resistance value.
•
Change probe type or alter parameter
PbC
.
•
Fit evaporator probe or alter parameter
tC
.
Display flashing
EE
Data corruption.
Check for electrical spikes and interference. Fit filters DIXL930 & DIXL932.
Ensure probe cables are separated from power cables. Re-check all parameter
settings. Replace controller if still not working.
Display flashing
dA
Door has been left open too long.
Shut the door.
Display flashing
EA
A non-serious external alarm has been
detected by the digital input.
Trace and rectify the external problem.
Display flashing
bAL
A serious external alarm has been
detected by the digital input.
Trace and rectify the external problem.
Buttons will not
work
Buttons have been locked.
Unlock buttons by pressing both
UP
&
DOWN
buttons until display flashes
Pon
.
Parameter cannot
be adjusted over its
full range
Some other parameter is conflicting and
preventing further adjustment.
Check other parameter settings.
Power on but no
output operates
Small LED’s
flashing
Anti-short cycle delay in progress, all
relays being held off until it expires.
Wait or adjust parameters
AC
or
odS
.
Evaporator fan short
cycling
Parameter
FSt
set too low.
Adjust
FSt
to a higher setting. During commissioning, set it above ambient until
pull down is complete, then re-set to a more suitable temperature.
22.
CHANGE OVER FROM F TO C OR VIS-VERSA
1. Hold the Set & Down (n) buttons, until HY is displayed, release both buttons then hold the Set and Down (n) buttons until Pr2 is
displayed. Release the buttons.
2. Scroll with the up button to CF, then press and release Set. Change the 1 to 0, then press and release Set.
3. Scroll down and adjust the ALL, ALU, FST, AFH, ALH, LS, US, rES as well as the HY.
4. Let the control time out to the temp display.
Adjust the Set temp by holding the Set until the C or F starts to flash, adjust the set point.
23.
ENTER YOUR SETTINGS HERE FOR FUTURE REFERENCE
Label
Description
Edit
Original
Vis.
Level
Min
Max
Comment
tC
Parameter map selection
7
Pr2
1
7
PbC
Kind of probe
ntC
Pr2
