EIP RM85H Owner's Manual page 6

F. When the unit is operated in ambient of less than 59° F, a
defrost cycle should occur approximately every ½ hour. The
exact time is impossible to predict as the unit is fitted with a
temperature sensitive defrost control. During this defrost cycle
the fan will switch off.
When the unit is defrosting, the % Relative Humidity displayed on the
digital controller may increase as a result of the ice / frost melting. This
is quite normal and the display will return to its normal reading when the
unit returns to dehumidifying mode. (Fan running)
If, after carrying out the above procedures, the unit does not appear to
function properly, refer to the Trouble Shooting section, which follows,
or contact the Factory Service Center.
ONCE THE UNIT HAS BEEN SWITCHED OFF, WAIT AT
LEAST FIVE MINUTES BEFORE RESTARTING.
After using the RM85H, turn it off for five minutes to allow the condensate on
the coils to drain into the pump reservoir, then press the momentary pump
purge switch for twenty to thirty seconds to evacuate the water from the pump
reservoir.
CAUTION:
Page 6 of 12
Drawing : - TPC433
Issue : - 2
Date : - 24/11/16