Bosch RDCI Series User Manual page 4

4 | TROUBLESHOOTING
Table.4-1
Normal Operation
Basic Checks
6 720 862 438 (2016/04)
Problems
Outdoor unit
• White mist or water
•
The sound of "hissing"
Indoor unit
• Bad odour
•
Operation LED flashes
• No priority of Standby on panel is
displayed
• Thawing frost light flashes in 30s
• Unit is operating at random periods
• No operation
•
Insufficient cooling
• Insufficient heating
Causes
• Fans may stop during defrost mode, the sound of valves
operating is normal
•
When the units starts and shuts down, normal sounds like
‚running water' and valves opening/closing will be heard for
up to 3-15 minutes.
•
The unit may make a ‚hissing' noise when the temperature
inside the heat exchanger changes.
• Household smells can adhere to the units, cleaning the
filters during service will improve this.
•
Should the electrical powers supply be interrupted.
• Other equipment preheating process stops cooling
operation.
• The operator sets an opposite mode against the fixed
cooling or heating mode.
•
The fans inside the indoor units may stop periodically to
avoid discharging the incorrect temperature of air into
the room. The fans will start again once the unit has the
sufficient temperature to discharge.
•
The master unit with slave units for different purposes,
when abnormal accident happen, the director will illustrate.
• When mode switches
• Incorrect settings in the programmer.
• Check there isn't or has been an interruption to the electrical
power supply (power cut).
•
Ensure all electrical power supply switches are in the ‚on'
position.
• Has a fuse tripped and interrupted the power supply.
Ensure a competent person inspects this.
• Incorrect settings in programmer.
• Whether the air inlet and air outlet of the outdoor unit is
blocked.
•
Ensure the windows and doors to the property are not open.
• Ensure all filter on units are clean, this will impinge the
performance.
• Ensure the air deflector on the indoor units are angled in the
correct position.
•
The fan is running on low speed.
• Ensure the requested temperature for the room is adequate.
•
The operator has selected cooling and heating
simultaneously. Indicator LED for standby or no priority will
be displayed.
RDCI Series – All DC Inverter Outdoor Units