Dometic MCS5 Notice D'utilisation page 29

_BA_MCS.book Seite 29 Donnerstag, 2. April 2009 9:56 09
MCS5, MCS15
9.3 Control Panel Troubleshooting
Problem
Control panel is not lit. 8-pin display cable plugs are not
Fan is not running or
runs continuously.
Fan is not running but
the compressor is.
Fan runs continu-
ously although it is set
to cycle with compres-
sor.
No cooling or heating. The Marine Climate System is
No heat.
Unit switches to heat
while in Cool Mode.
Fan coil is iced.
Possible Reason
making contact (unplugged, dirty,
bent, or broken pins).
The Marine Climate System is
programmed for either fan cycling
with compressor or continuous
fan operation.
Failed triac on control panel
circuit board.
Failed triac on control panel
circuit board.
programmed for heat or cool only.
"HPF" or "LPF" is displayed.
The Marine Climate System may
be set to Electric Heat, not
Reverse Cycle.
De-icing feature enabled due to
coil icing up.
Improper airflow.
Troubleshooting
Solution
Power off at the circuit breaker.
Remove connector and inspect.
If damaged, replace connector or
entire display cable.
Reprogram parameter P-14.
Note: After the compressor
cycles off, the fan will continue to
run for 2 min in Cool Only Mode
and 4 min in Heat Only Mode
regardless of parameter setting.
Send for repair or call local
service technician.
Send for repair or call local
service technician.
Reprogram parameter P-1.
See below.
Reprogram parameter P-15.
Reprogram parameter P-8
See corresponding section in
chapter "General Troubleshoot-
ing" on page 24, before repro-
gramming the Marine Climate
System.
Reprogram parameter P-8 to
enable de-icing.
If de-icing cycle does not melt ice,
switch air conditioning unit to
heat until ice melts or use hair
dryer to melt ice.
If problem persists, reprogram
Low Fan Speed Limit for maxi-
mum value: Set P-3 to 64.
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