Troubleshooting guide

Monark 831 E
22
Operation interferences
It is normally considered that about 70 % of all shutdowns on small computers are caused by mains interferences,
i.e. at shot over voltage. These interferences can often be caused by different machinery, which is started or
stopped. The processor in the computer is then reacting incorrectly or is not working at all. The problems can be
solved by means of a mains interference protector, which is connected between the mains and the transformer.
Troubleshooting guide
Symptom Probable Cause/Corrective Action
LED doesn’t light up. No current in the outlet. Check the fuses.
Right trafo? Check so that the trafo information in section “Facts” is
in accordance with the trafo used.
No connection to PC. Check cables.
Right COM port?
Drivers missing when using the USB serial adaptor. CD with drivers is
included.
Is the right “type cmd” set?
Does not load work. Check rpm (no force is applied if rpm is less than the pedal low ref,
default 30 rpm).
Check calibration.
No heart rate. Check the chestbelt (battery). Wet the thumbs and place them on the
electrodes. A low clicking sound will appear near battery lid while you
click on the electrodes with one thumb.
Use another external HR monitor to check the belt.
Check that the chestbelt is positioned correctly on test subject and
tight enough.
Check that the electrodes are wet, in some cases it is necessary to use
a contact gel or a mixture of water with a few drops of washing-up
liquid.
The level for HR signal can vary from person to person. Put chestbelt
on another known person who has a good pulse rendering.
Check for no loose cables or jack if you have a plug-in receiver. Use
another pulse receiver (pulse watch or test bike monitor) to check the
chestbelt.
Check that it is the correct receiver and that it is in the correct place. If
it has a round Polar-sticker it should be placed straight.
No rpm reading. Check cable.
Unable to calibrate force. Potentiometer belt may be slipping or broken. Replace if damaged.
Potentiometer misadjusted.
Reboot memory from service menu (99). Set default (3).
Uneven heart rate. Use an external unit, for example a pulse watch, to check if it also
indicates irregular pulse. If his is the case, there is probably distur-
bance in the room. Magnetic fields from high voltage cables, elevators,
fluorescent tube etc can cause the disturbance. Other electronic equip-
ment could be placed too close.
If irregular pulse remains we recommend measuring HR manually. If
HR still remains irregular at workload test subject’s health needs to be
examined.
There is a click noise with every pedal revolu-
tion (increases with the weight).
The pedals are not tight. Tighten them or change pedals.
The crank is loose. Check, tighten.
The base bearing is loose. Contact your dealer for service.
Scratching sound is heard when pedalling. Check that the carriage block is taken off and that none of the covers
is scratching.
There is a click noise and a squeak noise when
pedalling.
Loosen the chain.