PTAC Service Manual

Service Manual
Installation and Maintenance
62
3. Confi guration that is easy for hotel personnel to repair (7 DIP switch, the confi guration is valid only after
power failure)
A. EL. HEAT ONLY (only electric heating) (valid in wired control mode, panel and remote controller)
ON-only electric heating; OFF-normal heating mode; default-OFF, this function is only applicable to HEAT PUMP
B. REMOTE (wired controller control)
ON-wired controller control is valid; OFF-panel control is valid; default-OFF
C. FAN CYCLE FOR HEAT (invalid in panel, remote controller, and wired controller mode)
ON-fan is constantly running; OFF-fan will be stopped according to the loads (HEAT, COMP); default-OFF (After putting through the
wired controller, the fan speed is controlled by the wired controller. .Whether it runs or not, which is controlled by the controller.)
D. FAN CYCLE for COOL (invalid in panel, remote controller and wired controller mode)
ON-fan will be stopped according to the loads (HEAT. COMP); OFF-fan is constantly running; default-OFF (After putting though the
wired controller, the fan is controller by the wired controller)
E. SETPOINT (SETPOINT1, SETPOINT2) (valid in panel, remote controller mode and invalid in wired controller mode)
OFF OFF-(61-86
o
F) (16-30
o
C);
ON OFF-(63-80
o
F) (18-28
o
C);
OFF ON-(65-78
o
F) (19-26
o
C);
ON ON-(68-75
o
F) (20-24
o
C);
Default-(61-86
o
F) (16-30
o
C)
If the display value of dual 8 exceeds the set point temperature limit, the display range is also 61~86
o
F(16-30
o
C); The actual working
temperature range for the controller is the range of set point temperature limit.
F. Freeze protection is prohibited (valid in wired controller, panel and remote controller mode)
ON-shield; OFF-valid; default—OFF
4.Confi guration that isnt needed the hotel maintenance personnel to control (confi guration is valid after B dial-
up is energized, while confi guration is invalid after A dial-up is energized)
A. Heat pump and Heat Cool units for selection. (Heat Pump is electric heating + heat pump; Heat Cool is electric heating + cooling
only)
Heat pump—ON;
Heat cool-OFF
Heat pump units should be equipped with Heat pump type wired controller.
Heat Cool units should be equipped with Heat Cool type wired controller.
B. Neglect for time delay (TIMER RESET)
When the dial-up is activated for once (from OFF to ON, or from ON to OFF), it will weaken all the current delay timer (once) (eg,
the compressors min stop time, compressors min running time, electric heating min stop time). After validation, if the dial-up has no
action, all the delay will resume normal. The specifi c delay time is as below:
Electric heating minimum OFF time---------------1s
Compressor minimum stop time-------------------9s
Compressor minimum running time---------------9s
Four-way valve delays for 2mins------------------6s (available when the compressor is required)
5. Confi guration mode
After the unit is turned on for 30s, press the fan speed button and the COOLER button for 5s, the confi guration mode will be started
up. After turning to the confi guration mode, if adjusting the temperature offset by buttons to turn to switching condition, the load will
be activated after 3s. While if turning to switching condition due to the change of the ambient temperature, it can be activated only
after quitting the confi guration mode. In the confi guration mode, the fi ve/six confi guration modes as below can be selected by FAN
SPEED button.
᮴䰸⑓ࡳ㛑ᴎൟⱘ  ⾡䜡㕂῵ᓣ˖
Mode one: Fahrenheit /Centigrade display mode
Fahrenheit and Centigrade display mode can be switched by pressing WARMER or COOLER button.
F indicates Fahrenheit display mode
C indicated Centigrade display mode
Mode two: Adjusting mode for cooling temperature offset
WARMER button can increase offset fset temperature 1
o
F(or
o
C). while COOLER button can decrease offset temperature 1
o
F(or
o
C).
The indoor ambient temperature offset adjusting range is -6 to +6
o
F(-3 to +3
o
C) (cooling mode LED is bright)
Mode three: Adjusting mode for heating temperature offset
WARMER button can increase offset temperature 1
o
F(or
o
C), while COOLER button can decrease offset temperature 1
o
F(or
o
C). The