MCS T6, MCS T12, MCS T16 Troubleshooting
31
System runs
continuously.
Improper air sensor location. Verify display head location.
Install alternate air sensor if
necessary.
Unrealistic set point. Adjust set point until unit cycles off.
“ASF” (Air Sensor Fail-
ure) is displayed.
Indicates failed face plate air sensor,
alternate air sensor or display cable.
Unplug alternate air sensor if
installed or plug in alternate air sen-
sor if not installed.
Try another display cable.
Damaged jack/socket in display
head or on circuit board.
Visually check to see that pins inside
socket are not bent or corroded.
Repair or replace display or circuit
board if needed.
“FIL” (Filter Replace-
ment) is flashing.
Filter needs replacement. Replace filter.
Reset P-21 to “00”.
“HPF” (High Freon Pres-
sure) is displayed.
High-pressure switch is open (in
cooling) due to improper seawater
flow.
Strainer or intake may be plugged,
seacock may be closed.
Check seawater hose for kinks or col-
lapses.
Verify pump operation.
Check pump circuit breaker if appli-
cable.
High-pressure switch open (in heat-
ing) due to improper airflow.
Remove obstructions in return air
stream.
Clean air filter and grille.
Check for crushed or restricted duct-
ing (ducting must be as straight,
smooth and taut as possible).
If problem persists,
– reprogram Low Fan Speed Limit
for maximum value: Set P-3 to
“64”
– set the reverse fan speeds during
Heating Mode parameter P-13 to
“rEF”, or manually set fan speed to
high
Problem Possible Reason Solution
MCS-6-12-16--O-West.book Seite 31 Dienstag, 14. November 2017 11:28 11
To Next Page
Loading...
Need help?
General
