Cruisair Cuddy dc, Installation And Operation Manual

Page: 10 / 36

10
❖
English
L-2028 Operation
Zephyr and Cuddy dc Units • Operation
Operation
Manual Control Panel Operation:
2-knob (2KB), 3.5-5K units; 3-knob (3KB), 10, 12, 16K
units, see figures 6 & 7.
1. Ensure seawater intake ball valve (seacock) is open.
2. Turn top (MODE) control knob to OFF.
3. Turn on air conditioning unit circuit breaker. If the seawater
pump has its own circuit breaker, turn that on too.
4. Turn top (MODE) control knob to FAN, this energizes the
fan (and the DPM in Cuddy dc systems).
5. Turn THERMOSTAT control knob to the coolest position
by rotating it fully clockwise.
6. Turn middle (FAN) control knob to highest setting
(for 3KB switch only).
7. Verify that the fan is running and that there is steady
airflow out of the supply air grill.
8. Turn top (MODE) control knob to RUN (for 2KB switch)
and ON (for 3KB switch). This will start the compressor
and seawater pump.
9. Check for a steady solid stream of seawater from the
overboard discharge.
10. To set the THERMOSTAT, allow sufficient time for the unit
to cool the area to the desired temperature. When the
area is sufficiently cooled, turn the thermostat knob slowly
toward the center position until it clicks once. The
thermostat is now set to maintain a constant temperature.
Important
Do not turn the unit off and immediately turn it back on. Wait
at least 30 seconds (2 minutes for the Cuddy dc) for system
refrigerant pressures to balance.
Troubleshooting Guidelines
Before you call for service, review this list. It may save you
time and expense. This list contains common occurrences
that are not a result of defective workmanship or materials. If
you need service after trying these procedures, call your
nearest Cruisair dealer.
Problem: System will not start.
Possible Reason/Solution
1.
Air conditioner circuit breaker is off.
Turn circuit breaker
on at ship’s panel.
2. Wiring at terminal strip is miswired (VAC unit only).
Check wiring diagram; correct if necessary.
3.
Input line voltage is insufficient (VAC unit only).
Check
power source for proper voltage. Check wiring and
terminals for proper sizes and connections.
4.
Cuddy dc plugs are not connected tightly (DC unit
only).
Check polarized plugs from unit to pump, power
module, and control. There should be an audible “snap”
when plugs go together.
5. Batteries are not fully charged (DC unit only). Turn
Cuddy dc unit off and charge battery bank.
6.
DC power wires are incorrectly sized (DC unit only).
See the “Electrical System and Wiring for DC Powered
Cuddy dc” section of this manual. Ensure that DC power
wires are sized and connected correctly.
7. Dedicated Power Module (DPM) is in lockout mode
(DC unit only).
The DPM has a protective overload lockout feature that
will cause it to shutdown in case of a problem. When this
occurs, turn Cuddy dc off and wait 2 minutes before
turning back on. If that does not solve the problem, then
continue reading:
a) If DPM has overheated (
≥
167°F [75°C]) then ensure that it
has at least one inch of air space above unit for, and is in
an area that provides, proper ventilation.
b) If compressor has overheated then check water pump,
strainer and hoses. When operating properly, there should
be a steady stream of water from the overboard dis-
charge. Strainer may need cleaning. Ensure that hoses
are not kinked or restricted in some other way. Pump
should come on with the compressor when control is set
to RUN.
c) If refrigerant pressure is too high, then turning the system
off for 2 minutes should correct that by allowing pressure
to equalize. Note: Turning the Cuddy dc on and off too
quickly may cause a high-pressure shutdown. During
normal operation wait at least 2 minutes from the time
control is turned off until it is turned back on.
d) If DC voltage is too high (>16-17VDC) or too low
(<10.5VDC), then check battery bank for correct charge.
Charge batteries if need be. Note: Turn Cuddy dc off and
charge batteries for 5 minutes. Try turning Cuddy dc on
again. If it runs, then that is a good indicator the batteries
were low. Fully charge batteries at this time.
e) If there is a dead short in the wiring, then disconnect
power supply and repair wiring.
If, after trying all of the above, the fan runs, but the
compress and pump do not, then that is a good indicator
there is a problem with the compressor and/or pump.
Whereas, if the fan does not come on at this time, then
that is a good indicator there is a problem with the fan or
the DPM. Either way, call for a service technician – please
see listing in back of this manual.