Page 144 - IOM / ROOFTOP BALTIC Series - 0704 - E
maintenance diagnostic
FAULT
Heat Pump mode:
Circuit breaker
open
POSSIBLE CAUSE AND SYMPTOMS
High Amps due to a low voltage from the main
supply
High amps due to freezing of the coil
Flexy: Water ingress in the motor connection
box.
SOLUTION
Check the voltage drop when all components
are running.
Change the circuit breaker for one with a
higher rating.
Check the adjustable amps on the motor
starter.
Adjust the defrost cycle set points.
Change the component
OUTDOOR AXIAL FAN
FAULT
High Temperature
trip out on electric
heater
POSSIBLE CAUSE AND SYMPTOMS
Low airflow rate
Incorrect position of the Klixon
SOLUTION
Measure and estimate the airflow and pres-
sure and compare with the specification from
customer.
Check that the Klixon, is positioned in the
airflow, relocate Klixon if necessary
Check that there is no heat transfer from the
Klixon support.
ELECTRIC HEATER
FAULT
Water found in the
ventilation section
Water ingress in
the filter
compartment
POSSIBLE CAUSE AND SYMPTOMS
Cooling mode:
Water carried away from the coil because of
excessive airflow and speed on the coil.
Low air pressure in the compartment due to a
high airflow rate or a high pressure drop before
the fan
Check seals around the ventilation section.
Water ingress through a leaking fresh air hood
or when running 100% fresh air
SOLUTION
Estimate the airflow rate and check the speed
is lower than 2.8 m/s
Check filter
Reduce airflow rate
Check the door seal
Check for the presence of silicone seals in the
corners of the door and at the bottom of the
refrigeration section bulkhead.
Check the seals and flanges in the fresh air
hood
Reduce the airflow rate if necessary
WATER LEAKS
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