Service Manual
Technical Information
32
In OFF mode, dual 8 wont display the error code (except the low temperature protection), and number 6, 7, 8 protection marks will
be eliminated. When multiple protections are overlapped, it activates only the protection with the highest priority.
3. Configuration that is easy for hotel personnel to repair (7 DIP switch, the configuration 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
(This function can be only be controlled by control panel or remote controller)
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
(
This function can be only be controlled by control panel or remote controller)
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.Configuration that isnt needed the hotel maintenance personnel to control (configuration is valid after B dial-up is
energized, while configuration is invalid after A dial-up is energized)
A. Heat pump and Heat Cool units for selection. (Heat Pump is electric h heat pump; Heat Cool is electric h 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 specific 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. Configuration mode
After the unit is turned on for 30s, press the fan speed button and the COOLER button for 5s, the configuration mode will be started
up. After turning to the configuration 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 configuration mode. In the configuration mode, the five configuration modes as below can be selected by FAN
SPEED button.
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
10
Frost protection(heat pump)
STATUS LED blinks 7 times and goes out for 3s circularly
11
Refrigerant lacking protection
Dual 8 displays "F0"
12
Compressor over-current protection
Dual 8 displays "E5"
13
Protection for electric heater error
Dual 8 displays "A2"
