Lily Tech ZL-330A User manual
Suzhou Lily Tech. Co., Ltd.
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1. Features
ZL-330A is an electronic thermostat for cooling. The device is ideally fitted to refrigeration equipment for cold
storage.
2. Main Function
● Temperature measurement
● Temperature display
● Temperature calibration
● Compressor delay protection
● Blustering when system warning
● Sensor problem warning
● External warning input
● Defrost control: Timed defrost , manual defrost and defrost water dripping
● Fan control
● The conditions of the end of defrost: is time and temperature
3. Main Specification
● Temperature Sensor: NTC
● Setting Range: -40～120℃
● Display Range: -50～130℃
● Working Temperature: -10～45℃
● Storage Temperature: -30～70℃
● Humidity: 5～85%RH (without dewing)
● Power Supply: 185 ~ 245VAC 50/60HZ
● Terminal Wire: <= 2 * 1.5mm2 or 1 * 2.5mm2
● Load Current: 3A 250Vac（Resistive load）
● Case: PC + ABS Fire Proof
● Protection Degree: IP30
4. Operation Instruction
4.1 Display Indication
Panel LED Indication
LED On Off Blinking
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TEMP SET In the temperature set state
- -
FAN Fan on Fan off -
COOL Compressor on Compressor off Delay protecting now
DEFROST Defrosting now Dropping water ends Dropping water now
Panel Digit Indication
Three red digits display the measured temperature and warning code. Warning Code:
No. Display Code Warning Information
1 E1 Room sensor open circuit
2 -E1 Room sensor short circuit
3 E2 Defrosting sensor open circuit
4 -E2 Defrosting sensor short circuit
5 Hi Room temperature exceeds the MAX TEMP
6 Lo Room temperature exceeds the MIN TEMP
7 EE Data access error
8 Err Password error or max/min temperature set invalid
9 iA External warning
10 dEF Defrosting now
11 Frd Forced cooling
12 UnL Restore the default password ”11”
4.2 Keypad Operation
Set Max and Min Temperature
● Press 【SET】, MAX TEMP LED will be on, and the digits will show the current max temperature.
Press key 【▲】 or 【▼】 to change the max temperature setting.
Press 【SET】 again, we can set the min temperature limit.
Keeping depressing 【SET】 for 3 seconds, or do not press any key for 30 seconds, the device will leave
the temperature testing mode.
● The factory setting: max temperature is -15 , min temperature is ℃-18 .℃
● The MAX TEMP must be higher than the MIN TEMP 1℃,otherwise could not be saved.
Note: Only after the【SET】being depressed for three seconds, will the set data be confirmed and saved.
4.3 Set System Parameters
Enter Into System Parameter Setting Mode
Keep depressing 【SET】 for three seconds, digits show “POO”. Input password + 【SET】. If correct,
enter into the mode, else return.
After enter into the mode, the display shows “U01”. Press 【▲】 or 【▼】 to select the parameter code.
Press【SET】 will show the parameter value. Then press 【▲】 or 【▼】 to set this parameters, and
press【SET】 to return.
The factory setting: password is “11”.
4.4 Exit the Mode
Keep depressing “SET” for three seconds, the set parameters will be saved, the mode exits.
Or do not press any key for 30 seconds, the mode exits, and the set parameters are not saved.
4.5 Parameter Code and Description Table:
N
o.
Parameter code Function Range Explain Factory
setting
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1
U10 Compressor power on delay time 1～100min 3
2
U11 Compressor MIN continuous work time
0～100min 3
3
U12 Compressor run frequency 0～8 0: Disable 5
4
U20 Room temperature sensor calibration -9.9～+9.9 0
5
U21 Defrosting sensor calibration -9.9~+9.9 0
6
U22 Temperature difference 0.1～+10.0℃
Control the
temperature
hysteresis
1.0
7
U30 Defrosting cycle 0~180 hour 0: Not defrost
12
8
U31 Defrosting﹙end﹚time 1～180min 30
9
U32 Defrosting end temperature 0.5～50℃ 15
10
U33 Dropping water time 0～180min 5
11
U34 Over temperature warning delay time
after defrost ends 0~180 hour 0: Disable 2
12
U35 Defrost when the device starts 0~1 0: Disable
1:Enable 0
13
U36 Defrost delay time when the device start
0～180min 0: Disable 0
14
U41 Fan start temperature -45～+120℃ -10
15
U42 Fan start-up delay 0～600sec 60
16
U43 Fan stop delay 0～600sec 0
17
U44 Fan mode 0～1 0: Controlled
1: Free mode 0
18
U50 High-temperature warning deviation
value to Max Temp 0~60℃ 0: Disable 0
19
U51 Low-temperature warning deviation
value to Min Temp 0~60℃ 0: Disable 0
20
U52 Over-temperature warning delay time 1～180min 30
21
U53 First over-temperature warning delay
time after power supply
0~180 hour 0: Disable 2
22
U60
External input warning
0~1
0:Warning off
1:On, Lock
2:On, Unlock
3:Off, Lock
4:Off, Unlock
0
23
U61 External warning input delay 0~120min 0
24
U62 Buzzer warning 0~1 0:Warning off
1:Warning on
25
U99 Password 0~99 11
5. Control Function Description
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5.1 Compressor Control
● When the temperature ≧“MAX TEMP”, and the time that the compressor has stopped ≧“the valve of
U10”, the compressor starts.
● When the temperature ≦“MIN TEMP”, and the time that the compressor has run ≧“the valve of U11”,
the compressor stops.
● Compressor emergent on
Press and hold “▼” key for five seconds, the compressor will power on if the following meets:
◆ controller in non-defrosting status
◆ controller in non-dropping water status
◆ the compressor stops
In compressor emergent on status, press and hold “▼” key for five seconds, the mode exits.
5.2 Compressor Delay Protection
● After power supply, the compressor is able to start only after the time (U10) has passed.
● After the compressor stops, it is able to restart again only after the time (U10) has passed.
● After the compressor starts, it is able to stop only after the time (U11) has passed.
5.3 Temperature Sensor Failure Protection: Protected Running Mode
● When the room temperature sensor fails, the system will automatically run in the protected running
mode. In this mode, the compressor will run and stop with the period of 30 minutes. Compressor works
for U12* 3 minutes, stop for ﹛30 - (U12* 3) ﹜minutes.
Note: If U12=0, system stops when sensor fails
5.4 Defrosting Function
5.4.1 Automatic Defrosting
● When the compressor continuously running time reaches the time of defrost cycle (U30), the system
starts to defrost.
● When one of the conditions (defrosting end time (U31) and defrosting end temperature(U32)) meets,
the defrosting stops.
5.4.2 Manual Forced Defrosting
● When in non-defrosting stage, press and hole【▲】 for 7 seconds, the system starts forced
defrosting. When in defrosting stage, press and hole 【▲】 for 7 seconds, the defrosting stops.
5.4.3 Dropping Water Function
● System can be set” Dropping water time (U33)”. After defrosting, within “Dropping water time”,
system will not start cooling.
● This function will not work when:
◆ manual forced defrosting ◆ during defrosting, while defrosting sensor fails
5.4.4 Check Defrosting Data
● Check defrosting sensor temperature: When the digit show the room temperature, depress 【▲】,
the digits will show defrost sensor’s temperature. Do not keep depressing for 7 seconds; else the
device will launch forced defrosting.
● Check the left time of defrosting or dropping: During automatic defrosting or dropping process,
depress 【▼】, the digits show the left time.
5.5 High-temperature and Low-temperature warning
● When the test temperature ≥ “MAX TEMP”+ “U50”,and the time reaches to “U52 or U53”,high
temperature warning starts.
● When the test temperature ≦ “MIN TEMP”+ “U51”,and the time reaches to “U52 or U53”,low
temperature warning starts.
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5.6 External input warning
●There are several ways for the external warning input to this device:
On: Close, warning starts. When ok, input opens.
Off: Open, warning starts. When ok, input closes.
Lock: when the external warning input signal disappears, system keep warning, Only press the key,
can warn stop.
Unlock: when the external warning input signal disappears, warning stops.
5.7 Fan control
Fan control mode: Controlled mode and free mode.
5.7.1 In the "controlled mode", the fan operates if it is cooling. But the fan does not start immediately
when the cooling starts. Controller probe to detect the temperature of the evaporator through the
defrost temperature, when the evaporator temperature drops below the fan temperature it will start the
fan, which can prevent the fan start after defrost refrigeration play hot air. Start cooling evaporator
temperature drop for a long time down more than the time prescribed by the fan start delay will be
forced to start the fan. If you want to immediately start the fan and fan start delay can be set to 0. After
the cooling stop, the fan will not immediately stop. It will be delayed for some time; this time should be
set in the fan stop delay parameter. If you do not need to delay, set this parameter to 0.
5.7.2 In the "free mode", the fans often turn only stop when defrosting. In this mode, ”fan start
temperature” , “fan start delay” and "fan stop delay" parameter have no effect.
6. Temperature Calibration Function
When there is tolerance between the measured temperature and real temperature, set parameter U20 and
u21 to calibrate. The calibration range is ±9.9℃. When set the parameter, the step is 0.1 for every key ℃
press. Keep pressing, the set data will increase/decrease quickly.
7. Restore the default password
When password forgotten, the following way can restore it:
Press and hold“▲”and “▼”key, turn on the power supply, the device displays “UnL”, after three seconds,
buzzer sounds, system auto restores the default password“11”.
8. Controller Installation
8.1 Warning
Avoid installing the device in the following environment:
● Relative humidity is greater than 90%, or possibly dewing.
● Strong vibration .
● Possibility be dropped, or within fog.
● Exposed to eroding and polluting gases (such as: air containing sulfur and ammonia, salty fog, smoky
mist) to prevent erosion and oxidation.
● Under strong electrical and magnetic fields such as under a powerful antenna, or near a huge power
motor.
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