Fault Finding - Emerson Universal-R Installing And Operating Instructions

21. FAULT FINDING

Problem
Display flashing HA
Display flashing LA
Display flashing HA2
Display flashing LA2
Display flashing P1
Display flashing P2
Display flashing P3
Display flashing EE
Display flashing dA
Display flashing EA
Display flashing bAL
Buttons will not work
Parameter cannot be adjusted
over its full range
Power on but no output operates
Small LED's flashing
Evaporator fan short cycling
1592031000 Univ-R4 GB - r1.1 - 2012.07.23
Possible reason
Temperature too high.

Temperature too low.

Condenser temperature too high.

 Condenser temperature too low.
 Fault with thermostat probe.
Wrong type of probe fitted (NTC/PTC).

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.
Fault with third probe.

Wrong type of probe fitted (NTC/PTC).

 Parameter tC has been set to 6 without
third probe fitted.
Data corruption.
Door has been left open too long.
A non serious external alarm has been detected
by the digital input.
A serious external alarm has been detected by
the digital input.
Buttons have been locked.
Some other parameter is conflicting and
preventing further adjustment.
Anti short cycle delay in progress, all relays
being held off until it expires.
Parameter FSt set too low.
Universal-R
Notes
Check cooling system.

Check alarm settings.

Check cooling system.

 Check alarm settings.
 Check condenser cooling system.
 Check alarm settings.
 Check condenser cooling system.
 Check alarm settings.
 Check probe connections and resistance value.
Change probe type or alter parameter PbC.

Check probe connections and resistance value.

Change probe type or alter parameter PbC.

 Fit evaporator probe or alter parameter tC.
Check probe connections and resistance value.

Change probe type or alter parameter PbC.

 Fit evaporator probe or alter parameter tC.
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.
Shut the door.
Trace and rectify the external problem.
Trace and rectify the external problem.
Unlock buttons by pressing both UP & DOWN buttons until display
flashes Pon.
Check other parameter settings.
Wait or adjust parameters AC or odS.
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.
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