Troubleshooting; Possible Causes - Myson WHISPA III 5000 Manuel D'installation, D'utilisation Et D'entretien

31601 Whispa Manual - US+French.qxp 16/11/2017 12:01 Page 11
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10 WHISPA III 5000, 7000 & 9000

11.0 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
Problem
Heating Mode -
No Fan
-
Heating Mode
Poor heating
performance and/or
unit cycles on
low limit thermostat
If the fan convector is still faulty after checking the above, call your installer or MYSON.
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
Problem
Poor heating
performance
Poor heating
performance
(unit may cycle on
low limit thermostat)

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
Low water temperature to unit
Poor water flow
Unit incorrectly sized for heat loss of room
Boiler thermostat set too low
Lack of flow to fan convector -
Isolating valves not fully open
System incorrectly balanced with unit starved of hot water flow
installer or MYSON. Before calling your installer or MYSON,
please carry out the checks listed below.
Turn up room thermostat
Check all wiring, reset breaker
Boiler ON and set to high
Circulating pump running
Note: Operation of fan convector can be checked by
switching to summer setting
Turn up boiler thermostat
Vent air from heating system
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.
Possible Causes
Pump set on low setting
Pipe sizing to unit too small
EN
Remedy
Switch on breaker
Check boiler -
Programmer ON