Mermaid Air Conditioner - Manual (Page 30)

4. Cooling Water:
a) Cooling water enters the boat through the foot scoop under the boat, up into the boat
through the sea cock, into the raw water strainer through the strainer and into the "water
in" port on the water pump. The water pump is controlled by the electrical box and will
be turned on and off with the air conditioner compressor. When the pump is operational,
it forces the cooling water through the "double fluted" air conditioner condensing coil
"inner chamber," cooling the system freon which is flowing through the condensing
coil "outer chamber". After passing through the condensing coil, the cooling water,
now warm from the heat exchange in the condensing coil, is passed overboard through
the "water out" thru-hull fitting (See FIGURE 3).
B. TROUBLE SHOOTING:
1. Standard 24v Thermostat In COOL Position - No Operation:
a) Make sure that Thermostat delay period has expired. Delay may be as long as 5
minutes.
b) Check SET temperature to make sure temperature is set below cabin temperature.
c) Once you are satisfied that the delay period has expired, check that both boat main
circuit breaker and air conditioner circuit breakers are in the ON position.
d) If both breakers are in the ON position, check to see if boat power source is present. If
power source is present, turn on another boat 115 vac accessory to make sure main
breaker is operational.
e) If main breaker is operational, using an AC voltmeter, check for 115 vac power at the
unit electrical box.
WARNING
ALWAYS USE EXTREME CARE WHEN CHECKING 115 VAC POWER.
CONTACT WITH 115 VAC POWER CAN CAUSE SERIOUS INJURY OR
DEATH.
f) If power is not present, check 115 (220) power leads on unit electrical box WHITE
terminal block for polarity, tightness and for signs of discoloration. If power is still not
present, check the air conditioner circuit breaker in the Main Circuit Breaker Panel for
loose connections (SEE ABOVE WARNING).
g) If 115 (220) vac power was present at the WHITE terminal block, using your AC
voltmeter, check for 24 vac on the "RED" wire attached to the BLACK terminal board
located directly above the WHITE terminal block on the side of the electrical box. You
should get a reading by placing one voltmeter lead on the "RED" wire and the other lead