Specifications

12
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English
Fault: Fan is not running but the
compressor is.
Possible Reason/Correction
1. Failed triac on Passport I/O circuit board.
Fault: Fan runs continuously although it
is set to cycle with compressor.
Possible Reason/Correction
1. Failed triac on Passport I/O circuit board.
Fault: No cooling or heating.
Possible Reason/Correction
1. Digital control programmed for heat or cool only.
2. “HPF” or “LPF” is displayed.
Fault: No heat.
Possible Reason/Correction
1. Digital Control may be set to Electric Heat, not
Reverse Cycle.
Fault: Unit switches to heat while in cool
mode.
Possible Reason/Correction
1. De-icing feature enabled due to coil icing up.
Fault: Fan coil is iced.
Possible Reason/Correction
1. Improper airow.
Fault: System runs continuously.
Possible Reason/Correction
1. Improper air sensor location.
Fault: “HPF” is displayed.
Possible Reason/Correction
1. High-pressure switch is open (in cooling) due to
improper seawater ow.
2. High-pressure switch open (in heating) due to
improper airow.
Fault: “LPF” is displayed.
Possible Reason/Correction
1. Low-pressure switch is open due to low seawa-
ter and/or low return air temperatures.
2. Low pressure switch is open due to loss of re-
frigerant.
Fault: “ASF” is displayed.
Possible Reason/Correction
1. Indicates failed face plate air sensor, alternate
air sensor or display cable.
2. Damaged jack/socket in display head or on cir-
cuit board.
Fault: “PLF” is displayed (Elite Digital
Control only).
Possible Reason/Correction
1. Indicates that seawater ow through the con-
denser coil is insufficient.
MCP Mechanical Control Panel
Troubleshooting
Fault: Fan is not running.
Possible Reason/Correction
1. MCP system switch is not set properly.
2. MCP fuse blown.
3. Wire became disconnected or loosened during
installation.
Fault: System runs continuously.
Possible Reason/Correction
1. Improper MCP air sensor location.