DE DIETRICH MIT-II-E, MIT-II-H, MIT-EP, MIT-HP and QUADROPAC DUP 500 User 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).