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11
SLIM-LINE RC
12.0 Troubleshooting (continued...)
Common Installation Faults
For optimum performance, this unit must be correctly sized to
match the heat loss requirements of the space it is required to
heat, and the heating system must be correctly designed to
provide adequate flow of hot water to the unit (refer to section
2). If the recommendations in section 2 are not followed,
problems may arise as detailed below.
Heating Mode -
No Fan
Heating Mode
(Heater model only)
poor heating
performance and/or
unit cycles on
water sensor
Possible Causes
Unit switched off
Temperature set point reached
Unit not switched on at fused spur
Fuse blown at fused spur
Unit isolating valves shut
Water temperature reaching fan
convector below 43°C
(Heater model only)
Problem Remedy
Low water temperature to unit Turn up boiler thermostat
Poor water flow Vent air from heating system
Note: Operation of fan convector can be checked by
switching to manual fan setting
Turn on
Increase temperature set point
Switch on at spur
Replace fuse
Open valves
Check boiler -
Programmer ON
Boiler ON and set to high with central
heating pump running
Note: Operation of fan convector can be checked by
switching to manual fan setting
Heating Mode
(Heater model only)
poor heating
performance and/or
unit cycles on
water sensor
Possible Causes
Boiler thermostat set too low
Lack of flow to fan convector -
Pump set on low setting
Isolating valves not fully open
System incorrectly balanced with unit starved of hot water flow
Pipe sizing to unit too small
Problem
Poor heating performance
(Heater model only)
Unit incorrectly sized for heat loss of room
13.0 Maintenance
Before undertaking any maintenance activity isolate the
electrical supply.
Maintenance should be restricted to occasional removal of dust
and lint around the unit. The outer surface may be wiped over
with warm water and mild detergent taking care to avoid water
entering the grille areas.
If the fan convector is still faulty after checking the above, call your installer or MYSON Service.
11.012.013.0
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