Pioneer YN018GMFI16M2D Service Manual page 27

Heating mode:
Current frequency
（Hz）
HEAT_F16
HEAT_F15
HEAT_F14
HEAT_F13
HEAT_F12
HEAT_F11
HEAT_F10
HEAT_F9
HEAT_F8
HEAT_F7
HEAT_F6
HEAT_F5
If the current frequency is lower than HEAT_F4, the frequency will not be limited.
After 10s of the compressor start, if the current>IHEAT, the AC will display the failure for 30 seconds
and stop. The AC will restart 3 minutes later.
8.5.5 Indoor / outdoor units communication protection
If the indoor units can not receive the feedback signal from the outdoor units for 2 minutes, the AC will stop
and display the failure.
8.5.6 High condenser coil temp. protection.
When T3>65 for 3 seconds, the compressor will stop while the indoor fan and outdoor fan will continue.
When T3<52 , the protection will release and the compressor will restart after 3 minutes.
8.5.7 Outdoor unit anti-freezing protection
When T2B<0 for 250 seconds, the indoor unit capacity demand will be zero and resume to normal when
T2B>10 .
8.5.8 Oil return
Running rules:
1. If the compressor frequency keeps lower than RECOILINFRE for 2hours,the AC will rise the frequency
to RECOILFRE for 3mins and then resume to former frequency.
2. During the oil return process, the EXV and indoor units keep the current running mode, the frequency
will not be limited by the compressor discharge temp. and the current.
Current limit value（A）
IHEATLMT12
IHEATLMT11
IHEATLMT10
IHEATLMT9
IHEATLMT8
IHEATLMT7
IHEATLMT6
IHEATLMT5
IHEATLMT4
IHEATLMT3
IHEATLMT2
IHEATLMT1
Model
YN018GMFI16M2D
YN027GMFI16M3D
YN036GMFI16M4D
Frequency limit
Decrease the frequency to HEAT_F4 and run at
HEAT_F4 for 3 minutes.
After that, the frequency will be adjusted according to
the capacity demand and rise to the upper level every
3 minutes
(When the frequency>Heat_F4
demand).
RECOILINFRE
45
45
40
via capacity