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Galletti MPE series, Инструкция по установке, эксплуатации и обслуживанию

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53

All copying, even partial, of this manual is strictly forbidden

RG66007169 - Rev 00

12 TROUBLESHOOTING

SYMPTOM

D

 The compressor 

does not start because 
the maximum pressure 
switch has tripped

E

   The  compressor 

does not start because 
the minimum pressure 
switch has tripped

F

   The fans do not start 

Cooling

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Heating

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Who can take 

corrective action

U 

= User

S

 =  specialised 

personnel

S

S

U

S

U

S

S

S

S

S

U

S

S

S

S

S

S

S

S

S

S

S

S

Possible control
panel indication

H1

H1

H1

H1

H1

H1

H1

H1

 

L1

L1

L1

L1

L1

L1

L1

L1

L1

L1

H1

L1

H1

L1

H1

L1

H1

L1

H1

L1

Probable cause

Pressure switch failure

Excessive refrigerant charge

Finned coil obstructed, insufficient air flow

Fan not working

Water circulation pump blocked

Water circulation pump defective

Presence of incondensable gas in the cooling circuit 

Refrigerant filter clogged

Pressure switch failure

Unit completely empty

Finned coil obstructed, insufficient air flow 

Water circulation pump blocked

Water circulation pump blocked defective

Presence of frost on the evaporating coil

Evaporator fan not working

Refrigerant filter clogged

Expansion valve is not working properly

Presence of humidity in the cooling circuit

Fan contactor deenergized (MPE only)

No power output by the fan speed control card (only 
MPE H or MPE with condensation control)

The fan's internal thermal protection has tripped 

Fan motor defective

Loose electrical connections

Possib le remedy

Check and replace

Discharge the excess gas

Remove dirt from the coil and any 
obstacles to air flow.

See item F

Release the pump

Check the pump and replace it if 
necessary.

Recharge the circuit after having drained 
and evacuated it 

Check and replace

Check and replace

See item G

Remove dirt from the coil 

Release the pump 

Check the pump and replace it if 
necessary.

See item O

See item F

Check and replace

Check and replace if necessary

Replace the filter and, if necessary, dry 
out the circuit and recharge 

Check the voltage at either end of the 
contactor coil and verify the continuity 
of the coil itself

Check the contacts and replace if 
necessary 

Check the fan conditions and the air 
temperature while the unit is running.

Check and replace if necessary

Check and fasten securely

Содержание MPE series

Страница 1: ...MPE 4 kW 76 kW INSTALLATION USE AND MAINTENANCE MANUAL GB ...

Страница 2: ...ging the operating mode from the keyboard on the unit 31 5 4 Display and setting of operating parameters 32 5 4 1 Parameters 32 5 5 Regulation logic 32 5 6 Set point compensation 33 5 7 Signals and alarms 34 5 7 1 Alarm reset 34 6 OPERATING LIMITS 35 6 1 Operating limits in chiller mode 35 6 2 Operating limits in heat pump mode 36 6 3 Thermal carrying fluid 36 7 CONTROL AND SAFETY DEVICES 37 7 1 C...

Страница 3: ...lletti S p A via L Romagnoli 12 a 40010 Bentivoglio BO Italia The unit data are reported on the rating label in this page THE LABEL SHOWS THE FOLLOWING DATA Series and size of the unit Date of manufacture Main technical data Manufacturer The label is applied on the unit usually on the enclosing panels beside the condenser coil IMPORTANT NEVER REMOVE THE LABEL Serial number of the unit The serial n...

Страница 4: ... THE FIRST START UP MUST BE CARRIED OUT EXCLUSIVELY BY QUALIFIED PERSONNEL AND AUTHORIZED BY GALLETTI SPA SEE WARRANTY SHEET ATTACHED Before performing any work on the unit disconnect it from the power supply Failure to comply with the rules provided in this manual will result in the immediate invalidation of the warranty Galletti S p A shall not accept any liability for injury or damage resulting...

Страница 5: ...rd 400 3N 50 0 Single phase M 400 3N 50 thermalmagnetic 2 Single Phase thermalmagnetic 4 Expansion Valve 0 Standard valve 0 Electronic expansion valve A Pump and accessories 0 Not present 0 Pump vessel water charge valve 1 Double pump vessel water charge valve 2 Buffer tank 0 Not present 0 Present S Heat Recover cooling only models 0 Not present 0 Present with contact for pump D Condensing control...

Страница 6: ... heat exchanger 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 7: ...changer 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver fan housing 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 8: ...exchanger 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver fan housing 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 9: ...changer 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver fan housing 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 10: ...exchanger 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver fan housing 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 11: ...xchanger 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 9 4 way valve MPE H 10 Thermostatic valve 11 Water safety valve 12 Liquid receiver fan housing 13 Pump 14 Compressor 15 Refrigerant filter 16 Low pressure switch and charge port 17 High pressure switch and charge port 18 Water gauge 19 Water charge ...

Страница 12: ... exchanger 3 Fans 4 Water differential pressure switch fan housing 5 Automatic air purge valve 6 Expansion vessel fan housing 7 Water tank accessory 8 4 way valve MPE H 9 Thermostatic valve 10 Water safety valve 11 Liquid receiver fan housing 12 Pump 13 Compressor 14 Refrigerant filter 15 Low pressure switch and charge port 16 High pressure switch and charge port 17 Water gauge 18 Water charge ...

Страница 13: ... 1 4 WATER CIRCUITS MPE EVAPORATOR AND PUMP MPE EVAPORATOR OPTIONAL OPTIONAL LEGEND VS Safety valve EV Evaporator PD Water differential pressure switch MA Water gauge VAS Air bleed hole OPTIONAL ONLY FOR MPE 28 66 30 45T 54 76T RANGE VE Expansion vessel P Pump RS Drain RC Water charge VU Check valve ...

Страница 14: ... PUMP AND BUFFER TANK OPTIONAL OPTIONAL OPTIONAL ONLY FOR MPE 28 66 30 45T 54 76T RANGE ONLY FOR MPE 10 27 RANGE ONLY FOR MPE 10 27 RANGE NOT AVAILABLE FOR MPE 04 08 NOT AVAILABLE FOR MPE 04 08 LEGEND VS Safety valve EV Evaporator PD Water differential pressure switch MA Water gauge VAS Air bleed hole VE Expansion vessel P Pump RS Drain RC Water charge VU Check valve ...

Страница 15: ...nit from the pallet handle it gently without applying excessive pressure on the side panels finned coil and fan grille You should collect and separate the packing materials wood cardboard nylon etc and make them available for recycling in order to minimise their environmental impact Before lifting remove the screws that fasten the machine base to the wooden pallet The unit must be lifted using Ø 1...

Страница 16: ...CONVEYANCE DIMENSIONAL AND SITING 2 3 DIMENSIONAL LEGEND 1 Water in 1 female 2 Water out 1 female 3 Safety valve discharge outlet provided with rubber ring holder 4 Water supply 1 2 male optional tap 5 Drain manifold 1 2 female 6 Power supply Ø 28 mm 7 Electric control board 8 Dampers fastening points accessory ...

Страница 17: ...ANCE DIMENSIONAL AND SITING 2 3 DIMENSIONAL LEGEND 1 Water in 1 1 4 female 2 Water out 1 1 4 female 3 Safety valve discharge outlet provided with rubber ring holder 4 Water supply 1 2 male optional tap 5 Drain manifold 1 2 female 6 Power supply Ø 28 mm 7 Electric control board 8 Dampers fastening points accessory ...

Страница 18: ...EYANCE DIMENSIONAL AND SITING 2 3 DIMENSIONAL LEGEND 1 Water in 1 1 4 female 2 Water out 1 1 4 female 3 Safety valve discharge outlet provided with rubber ring holder 4 Water supply 1 2 male optional tap 5 Drain manifold 1 2 female 6 Power supply ĭ 28 mm 7 Electric control board 8 Dampers fastening points accessory ...

Страница 19: ...AL AND SITING 2 3 DIMENSIONAL MPE 28 45 WITH BUFFER TANK MPE 30 45 T LEGEND 1 Water in 1 1 4 female 2 Water out 1 1 4 female 3 Safety valve discharge outlet provided with rubber ring holder 4 Water supply 1 2 male optional tap 5 Drain manifold 1 2 female 6 Power supply Ø 37 mm 7 Electric control board 8 Dampers fastening points accessory ...

Страница 20: ...ENSIONAL AND SITING 2 3 DIMENSIONAL MPE 54 66 WITH BUFFER TANK LEGEND 1 Water in 2 female 2 Water out 2 female 3 Safety valve discharge outlet provided with rubber ring holder 4 Water supply 1 2 male optional tap 5 Drain manifold 1 2 female 6 Power supply Ø 37 mm 7 Electric control board 8 Dampers fastening points accessory ...

Страница 21: ...is strictly forbidden RG66007169 Rev 00 2 INSPECTION CONVEYANCE DIMENSIONAL AND SITING 2 3 DIMENSIONAL LEGEND 1 Water in 2 female 2 Water out 2 female 3 Drain manifold 1 2 female 4 Power supply 5 Electric control board 6 Dampers fastening points accessory ...

Страница 22: ...irements This appliance is not intended to be used by children or persons with physical sensorial or mental problems inexpert or unprepared without supervision Be careful that children do not approach the appliance 2 4 1 INSTALLATION CLEARANCE REQUIREMENTS To guarantee the proper functioning of the unit and access for maintenance purposes it is necessary to comply with the minimum installation cle...

Страница 23: ... CONNECTION SIDE ELECTRICAL BOX EXCHANGER SIDE HEAT EXCHANGER WATER CONNECTION SIDE EXCHANGER SIDE ELECTRICAL BOX MPE N DAMPERS 04 08 4 10 15 4 18 27 4 28 66 6 30 45 T 6 54 76 T 6 2 5 DAMPERS SITING DAMPERS MPE 30 45T SIDE DISCHARGE WATER ELECTRICAL BOX EXCHANGER SIDE HEAT EXCHANGER WATER CONNECTION SIDE MPE 30 45T SIDE DISCHARGE WATER HEAT EXCHANGER WATER CONNECTION SIDE ELECTRICAL BOX EXCHANGER ...

Страница 24: ... the unit in proximity to the latter standard mechanical filter FM OBLIGATORY and check valve VNR on the supply line upstream from the filling tap RC an air vent valve at the highest point of the circuit escape pipe for the safety valve VS which in the event the safety valve opens diverts the jet of water to an area where it cannot harm persons or damage property Important vibration damping coupli...

Страница 25: ...the system regulating devices To fill the circuit open slowly the water tap of the system optional When water starts coming out of the air vent valves of the indoor units close them and continue filling until the pressure gauge reading is 1 5 bars OPTIONAL LEGEND VS Safety valve EV Evaporator PD Water differential pressure switch MA Water gauge VAS Air bleed hole SA Storage tank VE Expansion vesse...

Страница 26: ...om the electric control board you must provide a switch with a delayed fuse meeting the specifications indicated in the table To access the electric control board it is necessary to remove the inspection panel figure 4 by taking out the screws introduce the power cable into the unit through the bushing on the side panel then bring it to the electric control board through the cable holder provided ...

Страница 27: ...2 00 2 00 2 00 2 00 3 00 Power supply V f Hz Auxiliary power supply V f Hz Power cables mm2 4 0 4 0 6 0 6 0 4 0 6 0 4 0 4 0 4 0 6 0 6 0 10 0 10 0 10 0 PCD connecting cables mm2 PCDS connecting cables mm2 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Safety fuse F A 16 0 16 0 20 0 25 0 10 0 32 0 16 0 20 0 20 0 25 0 25 0 32 0 32 0 32 0 Circuit breaker IL A 20 0 20 0 25 0 25 0 16 0 32 0 20 ...

Страница 28: ...E CONTROL PANEL NOTE On the terminal block of the electric control panel a voltage of 24V will be present at the 50 24V terminals in the event of an alarm if it is desired to interface with a voltage free contact a relay must be applied for this purpose by the installer GENERAL ALARM SIGNAL COOLING HEATING REMOTE SELECTION ON OFF STAND BY SWITCH PCDS POWER SUPPLY USE SHIELDED CABLE WITH ONE TWISTE...

Страница 29: ...k that the plumbing connections have been properly made according to the indications given on the plates to be found on the unit itself water inlet water outlet etc Make sure that the pump is not blocked Make sure that the water circuit is duly bled to completely eliminate the presence of air load the circuit gradually and open the air vent valves which the installer should have set in place Warni...

Страница 30: ...ctronic control device Installing a PCD remote control panel instead provides remote access to all the electronic control functions installed in the unit 5 1 2 MAIN FUNCTIONS Control over the temperature of water entering the evaporator Management of the defrosting function MPE H only Control of fan speed standard feature of MPE H optional for MPE Complete alarm management Setup for serial line co...

Страница 31: ...eating mode using the PCDS remote control accessory or open terminal bridge 19 30 on the electric control board see section 5 3 3 5 3 2 SWITCHING THE UNIT ON AND OFF IN THE HEATING MODE MPE H HEAT PUMP MODEL ONLY Pressing for more than 5 seconds allows the heating mode to be activated or deactivated It is not possible to change over directly from the heating mode to the cooling mode to do so it is...

Страница 32: ...utton return to the previous value b If no operations are performed on the keypad for 60 seconds the controller exits the parameter modification menu by timeout and the changes are cancelled With this new configuration the operating mode can be changed only from the keypad on the unit itself or from the PCD remote control panel accessory which remotely duplicates all its functions terminals 19 30 ...

Страница 33: ...n other situations the setpoint actually being used to control the unit will thus not be displayable as a parameter on the controller such a situation might however mislead the end user into making an unsuitable setpoint adjustment HEAT PUMP UNITS Such units provide for the offset logic to be used in the heating mode in order to reduce the working setpoint as the outdoor temperature decreases The ...

Страница 34: ...m relay is activated and the display starts flashing The alarm must be manually reset EPr EPb Eeprom error alarm It indicates that a problem has occurred in the saving of parameters in the non volatile memory of the unit EEPROM If the code shown is EPr the unit will continue to function until the next time the power supply is cut off If the error is still present when the power supply is restored ...

Страница 35: ...option OPZ 1 2 Condensation control glycol low temperature option EEV Electronic expansion valve STD Standard Warning The units are designed to work with water and air temperatures falling within the range defined by the operating limits Attempting to operate the units beyond these limits could cause irreparable damage to the units themselves 1 For transitory periods e g equipment start up values ...

Страница 36: ...URE All copying even partial of this manual is strictly forbidden RG66007169 Rev 00 6 OPERATING LIMITS 6 2 OPERATING LIMITS IN HEAT PUMP MODE RH Relative humidity of outdoor air Tbs1 Outdoor temperature dry bulb Tw2 Outlet water temperature 6 3 THERMAL CARRYING FLUID The units belonging to the MPE series can work with mixtures of water and up to 30 ethylene glycol ...

Страница 37: ...essure switch stops the compressor when the intake pressure falls below the set value 7 2 4 ANTI RECYCLE TIMER The function of the timer is to prevent excessively frequent compressor starts and stops This device is a function included in the microprocessor control it prevents the compressor from starting up again after a stop until a set period of time has elapsed approximately 5 minutes 7 2 5 ANT...

Страница 38: ...scribed in this section MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL Warning Before carrying out any work on the unit or accessing internal parts make sure you have disconnected it from the mains electricity supply Warning The upper part of the compressor casing and the outlet pipe reach high temperatures Be especially careful when working in their vicinity Warning Be especially careful when wo...

Страница 39: ...7 7 5 8 5 9 7 9 2 Maximum power input kW 2 0 2 3 3 0 5 0 5 0 5 1 7 2 8 9 10 5 12 5 13 6 14 5 18 0 18 3 Maximum current absorption A 9 8 11 6 15 3 24 2 9 2 26 3 14 4 17 4 20 0 24 3 26 2 27 6 33 6 35 5 Starting absorbed current A 38 44 63 98 49 99 50 65 68 75 104 158 132 133 n of compressors circuits 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Refrigerant charge kg 1 5 1 5 2 0 2 1 2 1 2 ...

Страница 40: ... 2 16 9 19 6 22 5 24 9 28 8 Maximum power input kW 18 9 21 8 22 4 22 7 23 3 20 9 24 4 26 6 30 8 27 0 29 9 32 3 39 4 Maximum current absorption A 36 5 41 5 42 5 45 2 46 2 39 9 45 9 49 7 56 7 48 0 53 0 57 0 69 0 Starting absorbed current A 166 161 163 163 165 86 96 127 130 177 187 202 229 n of compressors circuits 1 1 1 1 1 1 1 1 1 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 Refrigerant charge kg 7 5 7 8 10 8...

Страница 41: ... Heating power input kW 1 6 1 9 2 5 3 7 3 4 4 0 4 0 5 1 5 9 7 0 7 5 8 5 9 3 9 7 Maximum power input kW 2 0 2 3 3 0 5 0 5 0 5 1 7 2 8 9 10 5 12 5 13 6 14 5 18 0 18 3 Maximum current absorption A 9 8 11 6 15 3 24 2 9 2 26 3 14 4 17 4 20 0 24 3 26 2 27 6 33 6 35 5 Starting absorbed current A 38 44 63 98 49 99 50 65 68 75 104 158 132 133 n of compressors circuits 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

Страница 42: ...3 2 MPE HP HS Heating power input kW 11 0 12 1 13 7 19 2 24 0 11 4 13 4 14 5 16 8 19 8 22 8 24 7 28 1 Maximum power input kW 18 9 21 8 22 4 22 7 23 3 20 9 24 4 26 6 30 8 27 0 29 9 32 3 39 4 Maximum current absorption A 36 5 41 5 42 5 45 2 46 2 39 9 45 9 49 7 56 7 48 2 53 2 57 2 69 2 Starting absorbed current A 166 161 163 163 165 86 96 127 130 177 187 202 229 n of compressors circuits 1 1 1 1 1 1 ...

Страница 43: ... valve 9 High pressure switch 10 Low pressure switch 11 High pressure gauge 12 Low pressure gauge 13 Service connection 14 Diff pressure switch 15 Check valve 16 4 Way diversion valve 17 Liquid separator 18 Liquid receiver 19 Pressure transducer 20 Liquid distributor 21 Oil pressure switch 22 Desuperheater 23 Shut Off valve 24 Pocket 25 Security valve 26 Fusible plug 27 Flow switc 28 Restrictor 29...

Страница 44: ...ll copying even partial of this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 2 MPE 04 07 WATER CHILLER COOLING CIRCUIT WITH ELECTRONIC VALVE 11 1 MPE 04 07 WATER CHILLER COOLING CIRCUIT ...

Страница 45: ...ll copying even partial of this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 4 MPE H 04 07 HEAT PUMP COOLING CIRCUIT WITH ELECTRONIC VALVE 11 3 MPE H 04 07 HEAT PUMP COOLING CIRCUIT ...

Страница 46: ...COOLING CIRCUIT WITH ELECTRONIC VALVE 11 5 MPE 08 27 WATER CHILLER COOLING CIRCUIT NOT PRESENT IN MPE 08 15 NOT PRESENT IN MPE 08 15 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 ...

Страница 47: ...CUIT 11 8 MPE H 08 27 HEAT PUMP COOLING CIRCUIT WITH ELECTRONIC VALVE 11 7 MPE H 08 27 HEAT PUMP COOLING CIRCUIT NOT PRESENT IN MPE 08 15 NOT PRESENT IN MPE 08 15 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 OPTIONAL NOT AVAILABLE FOR MPE 08 ...

Страница 48: ...this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 10 MPE 28 66 WATER CHILLER COOLING CIRCUIT WITH ELECTRONIC VALVE 11 9 MPE 28 66 WATER CHILLER COOLING CIRCUIT OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL ...

Страница 49: ...tial of this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 12 MPE H 28 66 HEAT PUMP COOLING CIRCUIT WITH ELECTRONIC VALVE 11 11 MPE H 28 66 HEAT PUMP COOLING CIRCUIT OPTIONAL OPTIONAL OPTIONAL OPTIONAL ...

Страница 50: ... this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 14 MPE 30 76 T HEAT PUMP COOLING CIRCUIT WITH ELECTRONIC VALVE 11 13 MPE 30 76 T HEAT PUMP COOLING CIRCUIT OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL ...

Страница 51: ...al of this manual is strictly forbidden RG66007169 Rev 00 11 COOLING CIRCUIT 11 16 MPE H 30 76 T HEAT PUMP COOLING CIRCUIT WITH ELECTRONIC VALVE 11 15 MPE H 30 76 T HEAT PUMP COOLING CIRCUIT OPTIONAL OPTIONAL OPTIONAL OPTIONAL ...

Страница 52: ...tifreeze sensor defective Tripping of main circuit breaker Not enabled by high or low pressure switch Compressor defective Compressor burnout or seizure Compressor contactor deenergized Power circuit open Motor thermal protection open Minimum pressure switch has tripped Compressor contactor defective Wrong set point or differential setting Lack of refrigerant Possible remedy Check the voltage and ...

Страница 53: ...pump blocked defective Presence of frost on the evaporating coil Evaporator fan not working Refrigerant filter clogged Expansion valve is not working properly Presence of humidity in the cooling circuit Fan contactor deenergized MPE only No power output by the fan speed control card only MPE H or MPE with condensation control The fan s internal thermal protection has tripped Fan motor defective Lo...

Страница 54: ...tedheatingcapacity Liquid filter clogged Low level of refrigerant 4 way cycle reversing valve defective Expansion valve is not working properly Water circulation pump blocked Water circulation pump defective Low level of refrigerant Liquid filter clogged 4 way cycle reversing valve defective The defrost thermostat has broken down or has been set incorrectly The compressor is noisy The panels vibra...

Страница 55: ...55 All copying even partial of this manual is strictly forbidden RG66007169 Rev 00 NOTES ...

Страница 56: ...www galletti it 40010 Bentivoglio BO Via Romagnoli 12 a Tel 051 8908111 Fax 051 8908122 Company UNI EN ISO 9001 and OHSAS 18001 certified ...

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