07
WHISPA III
®
5000 WM & 9000 WM
8.0
9.0
10.0 Troubleshooting
Once installed this fan convector becomes an integral part of a
complete heating system that includes boiler, pump, other
emitters such as radiators and fan convectors, and a number of
heating controls, dependent on system complexity. An apparent
problem with this unit may be the result of system controls being
incorrectly set and can be solved easily without calling out your
installer or MYSON. Before calling your installer or MYSON,
please carry out the checks listed below.
Heating Mode -
No Fan
Possible Causes
Room thermostat not calling for heat
Unit not switched on at breaker panel
Breaker tripped at panel
Water temperature reaching unit
below 110°F
Problem
Remedy
Turn up room thermostat
Switch on breaker
Check all wiring, reset breaker
Check boiler -
Programmer ON
Boiler ON and set to high
Circulating pump running
Heating Mode
poor heating
performance and/or
unit cycles on
low limit thermostat
Low water temperature to unit
Turn up boiler thermostat
Poor water flow
Vent air from heating system
11.0 Maintenance
Description
Quantity
Part Number
Spares List
Motor / Fan Assembly WHISPA III
®
5000
7100088
1
Motor / Fan Assembly WHISPA III
®
9000
7100090
1
Switch, 3 way
1300025
1
Switch, 2 way
1300024
1
Low Limit Thermostat
1260007
1
Wiring Harness
3001047
1
Cover Plate 5000 WM
7000547
1
Cover Plate 9000 WM
7000548
1
Before undertaking any maintenance activity isolate the
electrical supply.
Maintenance should be restricted to occasional removal of dust
and lint around the front overplate.
This unit should be serviced periodically by a competent person.
This should involve internal cleaning of the heat exchanger using
a soft brush or vacuum cleaner, taking care not to damage fan or
heat exchanger.
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 (see Section 2).
If the recommendations in Section 2 are not followed,
problems may arise as detailed below.
Poor heating
performance
(unit may cycle on
low limit thermostat)
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
Unit incorrectly sized for heat loss of room
If the fan convector is still faulty after checking the above, call your installer or MYSON.
10.0
11.0
EN
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