DE DIETRICH MIT-II-E, MIT-II-H, MIT-EP, MIT-HP and QUADROPAC DUP 500 - Manual (Page 20)

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MIT-II - MIT/P - QUADROPAC DUP 500 14/04/2010 - 300015090-001-L
FAIL. PAC V4V x x 4-way valve fault
PAC malfunction
Fault level: temporary - 4-way valve blocked open or closed
- Reversal of the heating flow and return
- Lack of refrigerant
- Regulator faulty
FAIL. PAC PUMP x Fault level: Permanent /
temporary - No water
- Circulating pump breakdown
FAIL.EXT.S.PAC x Fault level: permanent in hot
mode / temporary in cold mode - Opening or short circuit on the outside temperature
sensor
FAIL.RET.S.PAC x x Fault level: Permanent - Opening or short circuit on the water inlet temperature
sensor
FAIL. PAC FLOW S. x x Fault level:Permanent - Opening or short circuit on the water outlet
temperature sensor
FAIL.BAT.S.PAC x Fault level:Permanent - Opening or short circuit at the fin tube exchanger
refrigerant temperature sensor
FAIL.EXCH.S.PAC x Fault level: permanent in cold
mode / temporary in hot mode - Opening or short circuit of the refrigerant temperature
sensor at the heat exchanger inlet
HGAS S.HP FAIL x Fault level:Permanent - Opening or short circuit of the refrigerant temperature
sensor at the compressor outlet
FLOW FAIL. 6 x Fault level:Permanent /
temporary - Exchanger frozen
FLOW FAIL. 7 x Fault level:Permanent /
temporary - Exchanger frozen
FLOW FAIL. 8 x Fault level: temporary - Exchanger frozen
FAIL.EEPROM CPU x Error EEPROM CPU - Switch off PAC and start up again
- Change the micro-connect board
FAIL. UNKNOWN x Fault unknown - Switch off PAC and start up again
- Change the micro-connect board
MC COM.FAIL x x Communication fault Boiler
Module
BIOS FAIL. x Wrong Carel box - Replace the box
CONFIG.FAIL. x Wrong coding resistor / cold
sensor combination - Check the wiring and the cold sensor
SHUNT/CA FAIL. x If the contact is open and there
is a communication with the
control panel, the PAC stops
(except ROE-H)
COND. ANTI. F. x The PAC flow temperature is too
low - Check that the back-ups are working
DEFROST FAIL. x -
AIR IN S.FAIL x - Opening of or short circuit on the air inlet temperature
sensor
HGAS S.FAIL x - Opening of or short circuit on the hot gas temperature
sensor
EVA.S.HP FAIL x - Opening of or short circuit on the evaporator
temperature sensor
COND.S.HP FAIL x -
HP FAIL.: ... x Fault number if this is not
included in the list -
Display ROE-II
ROE-H
ROE+
ROE+TH
SOLO
NAPO
ROI+ Installation malfunction/HP or
PAC
Meaning / Cause (listed in order of likelihood)

When a fault is displayed followed by AUTO, this disappears automatically after a few minutes. When the fault displayed is followed by
MANU, it is necessary to reset the HP using the reset button (See section 3.1).