Hitecsa RCAH RCF Serie Manual De Instalación, Operación Y Mantenimiento página 78

9 – T
ROUBLESHOOTING
Guidelines for troubleshooting
The following table lets the User make a first rough check when one of these possible failures are detected in the plant
system; to check and solve alarm situations shown by the controller on the remote control panel display please consult the
controller manual.
Detected failure
Fans not running
Compressor not running
Insufficient air volume
Insufficient heating/cooling capacity
Too frequent defrost mode
Too high condensing pressure
Condensed water stays inside
10 – M
D
ATERIAL
At the end of its lifetime, each unit shall be disposed complying with the regulations in force in the country where it has
been installed.
The main materials used are:
Prepainted sheet metal
-
Galvanized sheet metal
-
- Aluminum sheet metal
Copper
-
Polyester
-
- Mineral wool
Plastic
-

Power supply

Fan control signal

Electrical
loosened

Motors overloaded or on alarm
condition

Compressor working point out of
envelope (too high condensing
pressure/too low evaporating
pressure/too low speed)

Motor overloaded

Air filter(s) dirty

Air ducts not clear

Fan settings inadequate

Refrigerant filling too low

Temperature setpoint not compatible
with actual system working condition

Fresh air temperature too low

Return air temperature too low

Exhaust airflow rate too low

Exhaust airflow rate too low

Air inlet temperature(s) too high

Refrigerant filling too high

Drainage point not clear

Drain trap missing or not proper
ISPOSAL
Possible why
missing
missing
connections wrong
What to do

Switch on main power supply/unit

Check fan settings/fan signal

or Restore the right connections

Check the input current/check fan
settings

Check airflow rates, indoor and
outdoor air conditions, supply air
temperature setpoint and compare
them to unit limits; too low capacity
required

Too much capacity required

Replace filter(s)

Check ductwork (dampers open ?)

Check fan settings

Contact service center

Check the setpoint and the actual
working condition

Preheat fresh air

Wait for the right room temperature
before starting the unit

Check return air filter and return air
circuit pressure drop

Check return air filter and return air
circuit pressure drop

Check the actual working condition
comparing to unit limits

Contact service center

Clean and clear the drainage point

Install proper drain trap
9