DE DIETRICH MIT-II-E, MIT-II-H, MIT-EP, MIT-HP and QUADROPAC DUP 500 - Manual (Page 19)

19
14/04/2010 - 300015090-001-L MIT-II - MIT/P - QUADROPAC DUP 500
H.PRES. FAIL. x x High Pressure fault
Installation malfunction
The PAC has been deactivated
after reaching the high pressure
limit - Heating water flow rate too low
- Heating circulating pump defective
- Differential valve incorrectly set or incorrectly
dimensioned
- Air in the heating circuit
- Nonreturn valve in the collector open or faulty
- HP pressure switch defective
- Condensor blocked
- Regulator faulty
HOT GAS FAIL. x Hot gas fault The temperature between the primary and the PAC
outlet is too high. (For example: -20°C outside - 50°C at
PAC outlet)
- Heating water flow rate too low
- Heating circulating pump defective
- Differential valve incorrectly set or incorrectly
dimensioned
- Air in the heating circuit
- Nonreturn valve in the collector open or faulty
- HP pressure switch defective
- Condensor blocked
- Regulator faulty
L.PRES. FAIL x x Low Pressure fault
PAC malfunction
The PAC has been deactivated
after reaching the high pressure
limit - System temperature too low
- Evaporator on PAC air/water frozen
- Heat source production or collector on PAC under-
dimensioned
- Leak in refrigerant circuit
- LP pressure switch defective
- Filter blocked
- Regulator faulty
- Glycol water concentration too weak
- Evaporator on PAC blocked
MOT.PROT.FAIL x x Motor/compressor protection
PAC malfunction
Compressor fault - defective
- Progressive starter faulty
- Filter blocked
- Electricity consumption too high
- Glycol water concentration too weak (< 25 %)
- Evaporator rusty
FLOW FAIL. x x Flow rate fault (Only with hot
water PACs and heating with 1
compressor)
Installation malfunction - On NAPO PAC : Flow rate on well too low
- Filter blocked
- Absorption well and supply well inverted
- Evaporator on PAC blocked
COMP.FAIL. x Fault level: temporary - Compressor rotation
HP OUT LIMIT x Under the lower operating limit
Installation malfunction - Antifreeze protection 2 time in 2 hours
OUT LIMIT 1 x Under the lower operating limit -
OUT LIMIT 3 x Above the upper operating limit -
FAIL. H.P PAC x Fault level: Permanent /
temporary - HP or fin tube battery sensor short circuited
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).