Dometic MCS15 - Manual (Page 27)

EN
MCS5, MCS15 Troubleshooting
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Failsafe Level 1
All actions in level 0 plus all other faults detected but not indicated.
The system shuts down for 2 min or until the fault is cleared, whatever is
longer.
The system will restart if the fault is cleared.
Failsafe Level 2
All actions same as level 0 and 1. Faults are indicated.
The system shuts down for 2 min or until the fault is cleared, whatever is
longer.
Failsafe Level 3
All actions the same as level 0, 1 and 2.
The system shuts down for 2 min or until the fault is cleared, whatever is
longer.
The system will lockout after four consecutive “HPF” or “LPF” faults.
To clear the lockout:
➤ Pressing the Power Button once to Off Mode.
➤ Pressing the Power Button again to On Mode.
9.3 Control Panel Troubleshooting
Problem Possible Reason Solution
Control panel is not lit. 8-pin display cable plugs are not
making contact (unplugged, dirty,
bent, or broken pins).
Power off at the circuit breaker.
Remove connector and inspect.
If damaged, replace connector or
entire display cable.
Fan is not running or
runs continuously. The Marine Climate System is
programmed for either fan cycling
with compressor or continuous
fan operation. 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.
Fan is not running but
the compressor is. Failed triac on control panel
circuit board. Send for repair or call local
service technician.