Troubleshooting MCS T6, MCS T12, MCS T16
30
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 pro-
grammed for either fan cycling with
compressor or continuous fan opera-
tion.
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.
Fan runs continuously
although it is set to cycle
with compressor.
Failed triac on control panel circuit
board.
Send for repair or call local service
technician.
No cooling or heating. The Marine Climate System is pro-
grammed for heat or cool only.
Reprogram parameter P-1.
“HPF” or “LPF” is displayed. See below.
No heat. The Marine Climate System may be
set to Electric Heat, not Reverse
Cycle.
Reprogram parameter P-15.
Unit switches to heat
while in Cool Mode.
De-icing feature enabled due to coil
icing up.
Reprogram parameter P-8
Fan coil is iced. Improper airflow. See corresponding section in “Gen-
eral Troubleshooting” on page 24,
before reprogramming 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 maximum value:
Set P-3 to 64.
MCS-6-12-16--O-West.book Seite 30 Dienstag, 14. November 2017 11:28 11
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