Page 124 - IOM / ROOF-TOP FLEXY™ Series
maintenance diagnostic
FAULT
HP PROBLEMS
AND HP CUT
OUTS
Strong variations
of pressure ( 2 to 3
bar) Thermostatic
Expansion Valve
"hunting"
Very high
discharge
temperature,
High amps
measured at
compressor
POSSIBLE CAUSE AND SYMPTOMS
Moisture or contaminants in the system
Condenser coil is obstructed
Recycled Hot Air
Incorrect adjustment of the expansion valve
Low refrigerant charge
Filter drier obstructed with gas bubbles at the
expansion valve inlet
Moisture in the system
Very high superheat, very hot compressor
Four Way reversing valve possibly blocked,
abnormal noise from the valve, low LP and
increasing HP
SOLUTION
If the circuit pressure is higher (<1bar) than the
saturated pressure corresponding to the
measured outdoor temperature, there is
possibility that some contaminants are present
in the system.
Reclaim the refrigerant, and vacuum the circuit
(Ensure very low and slow vacuum for R407c)
Recharge the unit
Check the condenser coil and clean is
necessary
Check clearance around the condenser
Refer to LP problems and LP cut out section
Open the superheat adjustment on the expan-
sion valve.
Check the pressure drop on the filter drier in
the suction line
Check operation of the valve by going through
cycle inversions. Change if necessary.
Refer to LP problems
INDOOR FAN BLOWER
REFRIGERATION
FAULT
High amps on
action Fan motor
High amps on
reaction Fan
motor
Unstable running
and high vibration
POSSIBLE CAUSE AND SYMPTOMS
Pressure drop in the ducting installation too
low.
Pressure drop in the ducting installation too
high.
Fan jumping from one operating point to
the other.
SOLUTION
Reduce the rotation speed of the fan
Measure and estimate the airflow and pressure
and compare with the specification from
customer.
Reduce the rotation speed of the fan
Measure and estimate the airflow and pressure
and compare with the specification from
customer.
Change rotation speed of the fan.
Summary of Contents for ROOFTOP FLEXY FCA 100
Page 1: ...INSTALLATION OPERATING MAINTENANCE MANUAL ROOFTOP FLEXY English August 2003 ...
Page 2: ......
Page 33: ...IOM ROOF TOP FLEXY Series Page 31 AIR FLOW BALANCING AT 12 12 FAN ...
Page 34: ...Page 32 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING AT 15 15 FAN ...
Page 35: ...IOM ROOF TOP FLEXY Series Page 33 AIR FLOW BALANCING AT 18 13 ...
Page 36: ...Page 34 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING AT 18 18 FAN ...
Page 37: ...IOM ROOF TOP FLEXY Series Page 35 AIR FLOW BALANCING RDN 450 FAN ...
Page 38: ...Page 36 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING ADN 355 FAN ...
Page 39: ...IOM ROOF TOP FLEXY Series Page 37 AIR FLOW BALANCING ADN 400 FAN ...
Page 40: ...Page 38 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING ADN 450 FAN ...
Page 104: ...Page 102 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS MAIN CURRENT DIAGRAM ...
Page 106: ...Page 104 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS CLIMATIC CONTROLLER ...
Page 108: ...Page 106 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS CLIMATIC INPUT FG FD ...
Page 112: ...Page 110 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS GAS BURNER 180 Kw ...
Page 132: ...Page 130 IOM ROOF TOP FLEXY Series ISO 9001 CERTIFICATION ...
Page 133: ...IOM ROOF TOP FLEXY Series Page 131 PED CERTIFICATION OF CONFORMITY ...
Page 134: ...Page 132 IOM ROOF TOP FLEXY Series GLASS WOOL FIRE CLASS ...
Page 135: ...IOM ROOF TOP FLEXY Series Page 133 33 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 136: ...Page 134 IOM ROOF TOP FLEXY Series 60 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 137: ...IOM ROOF TOP FLEXY Series Page 135 120 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 138: ...Page 136 IOM ROOF TOP FLEXY Series 180 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 139: ...IOM ROOF TOP FLEXY Series Page 137 INSULATION FIRE CLASS ...
Page 140: ...Page 138 IOM ROOF TOP FLEXY Series INSULATION FIRE CLASS ...
Page 141: ......