Fan Mode - Fisher PTTW-10-EC Series Engineering Manual

24
THROUGH THE WALL UNIT
Maximum defrosting time is 12 minutes (including compressor stoppage). If defrosting time is
greater than 12 minutes and the OPT temperature is still below 15℃, the defrost cycle is
stopped and normal heating resumes.

2.2.5 FAN MODE

2.2.5.1 Compressor status: Stopped.
2.2.5.2 Four-way valve: No power supply.
2.2.5.3 Outdoor unit fan motor: Stopped.
2.2.5.4 Indoor unit fan motor: Auto, low, middle and high fan speeds may be selected.
2.2.6 PTC ELECTRIC HEATER
2.2.6.1 ON-BOARD ELECTRIC HEATER
2.2.6.1.1 Auto electrical heater function.
When unit is in heating mode, on-board electric heater functionality will be activated
automatically. System will check the room temperature RT after the compressor has been
working for 10 minutes
a. When RT≤18℃, on-board electrical heater is ON.
b. When RT≥22 ℃, on-board electrical heater is OFF.
c. The on-board electrical heater will turn on again when RT≤18℃.
2.2.6.1.2 Manual electrical heater function
When unit is in heating mode, change the on-board electric heater from automatic to manual
by pressing the electric heater power button from on-board control panel or IR-handset
(electric heater LED indicator will light up). Press the same button again to disable the electric
heater function.
On board electric heater will turns on when following conditions are fulfilled:
a. When compressor has been run for 4 minutes.
b. Indoor fan is on.
c. Unit is not in defrost function.
d. Room temperature RT＜25 ℃.
Note: Once on-board electric heater change from auto to manual, it is not possible to change
to auto unless the unit is switch off and switch on again.